GTX 260 on Snow Leopard

[dontbeefkeith]

Cheers Rich

 

I had to go out and buy a cheapy just to get my machine running (had a shed load of work to do!).

 

This afternoon I'm going to take the damn thing by the scruff and teach it not to {censored} on the sofa. No need for this calm assertive stuff. Screw Cesar Milan, I'm going Crocodile Dundee on it's arse.

 

I'll let you know if it works.

 

Elliot

On the lam, UK

[FKA]

Hi Guys!

 

I'm running my Asus GTX 260 (dual DVI) simply with GraphicsEnabler=yes ! No EFI string or DSDT patch

Curently PC EFI 10.5

 

Both DVI outs work. DVI to HDMI works and DVI to VGA works.

 

I currently have DVI to VGA and DVI to HDMI connected!

 

D.

[dontbeefkeith]

Cool,

 

I'll give that a bash, I'm on 10.6.2, I've got a Gigabyte GTX260 896MB GDDR3 With a DVI, VGA and HDMI out, I'm a bit concerned that if I'm not going to be able to get all outputs to work. I've no idea what the NVCAP for this would be. OSX X86 Tools only has a DVI-VGA DVI-DVI etc... There is nothing for 3 outputs, one including HDMI.

 

Any one know what the NVCAP should be?

[FKA]

Cool,

 

I'll give that a bash, I'm on 10.6.2, I've got a Gigabyte GTX260 896MB GDDR3 With a DVI, VGA and HDMI out, I'm a bit concerned that if I'm not going to be able to get all outputs to work. I've no idea what the NVCAP for this would be. OSX X86 Tools only has a DVI-VGA DVI-DVI etc... There is nothing for 3 outputs, one including HDMI.

 

Any one know what the NVCAP should be?

 

because you have DVI, VGA, HDMI ports you will most likely need EFI with NVCAP to get all ports working!!

 

Viva Dual DVI!!

[dontbeefkeith]

Yeah, I just need to know the NVCAP for DVI VGA & HDMI and I should be able to build my own efi string. Plus I've no access to a windows box to throw the card in capture the rom with the flash tool and get the nvcap from that.

 

Really should have looked for dual dvi when I bought this card, I was taken in because it is an overclocked version.

[FKA]

Yeah, I just need to know the NVCAP for DVI VGA & HDMI and I should be able to build my own efi string. Plus I've no access to a windows box to throw the card in capture the rom with the flash tool and get the nvcap from that.

 

Really should have looked for dual dvi when I bought this card, I was taken in because it is an overclocked version.

 

I used this for a 9500 GT with DVI VGA HDMI - it was the only NVCAP config that made the HDMI port work.

 

0400000000000b00040000000000000700000000

 

NVCAP should be port specific so this 'should' work for you.

 

Also note I've never managed to get DVI and HDMI to output at the same time with DVI VGA HDMI ported cards

- With these cards the HDMI port is a mirror of the DVI (TV out) so even in windows will only output a mirror of the DVI !

 

I honestly dont know why manufacurers still make DVI, VGA .HDMI cards .... it's frankly cheep !

I see no reason for all new cards not to be dual DVI!

 

 

D.

[mattycraig]

I've been searching high and low for months now about support for my GTX 260. I cant seem to find anything about it anywhere so I figure I'll ask here. I'm tempted to just go out and buy a compatible card that works out of the box but I figured I'd give it one last go and ask for help.

 

I have an nVidia GeForce GTX 260 with 1792mb of ram and nothing seems to work... EFI strings, patched DSDT, GraphicsEnabler=yes, NVEnabler... Ive tried them all to no avail. I'm wondering if its because I need to put in the right VRAM size? I'm at a loss. Any ideas? Does anybody have this card?

 

By the way my specs:

Dell Studio XPS 9000

i7 920 2.66 GHz

9GB DDR3

GTX 260 1792mb

 

 

**UPDATE**

 

I went out and bought myself an ASUS Gtx 285 and it works perfectly! Everything else works perfectly fine, sound with voodoo, sleep works, 64 bit with no problems.... Im so happy

[Bootes]

So I've spent days trying to get this to work and it isn't. I have an Asus P5B-Deluxe motherboard and a EVGA 896-P3-1264-AR GeForce GTX 260 SSC Edition 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card .

 

I installed OS X by formatting my external HD with 2 partitions. I copied my Snow Leopard installer to one partition and installed Snow Leopard to the other. I removed all the NV kexts from /System/Library/Extensions on the installer and used to EmpireEFI to boot the installer. Once it was installed, I booted into Single User Mode and followed http://www.infinitemac.com/f19/guide-gefor...-leopard-t4057/ of moving the NV kexts. I booted into Snow Leopard ok and ran MyHack from the EmpireEFI disc http://osx86.sojugarden.com/installer/ installing com.apple.Boot.plist, GraphicEnabler, FakeSMC, FramebufferDisabler, JMicronATA, LegacyAppleRTC, NullCPUPowerManagerment, OpeHaltRestart, PlatformUUID, and SleepEnabler. I then ran System Update and updated to 10.6.2 and completed the rest of the guide on getting my GTX 260 working. When I booted I got a kernal panic on SleepEnabler, and realized I needed a newer one for 10.6.2, which I did. Next boot I got a black screen.

 

So I remove the NV kext's Snow Leopard boots perfectly and everything works great, but if I put them back I get a black screen still. Anyone have any idea why it isn't working? I added the stuff to both my com.apple.Boot.plist in /Library/Prefereces/SytemConfiguration and /Extras.

 

Thanks!

[Freaky Chokra]

Don't do any of these hack or EFI strings. I spent the better part of sunday fiddling with it.

 

I suggest either reinstalling or going back over EVERYTHING. Make sure ALL com.apple.Boot.plists are wiped of any EFI info (even one's not in /Extra folder, such as the system folder one, some utilities to get cards working go there instead of /Extras).

 

The only thing I do is boot with a CUSTOM dsdt.aml–which includes the graphics card and ethernet–and graphics enabler in Chameleon/PC_EFI. I'll throw the link to the DSDT.aml tutorial (It's a PDF by a member of this forum, it's his link, cant find topic offhand)

 

http://www.mediafire.com/download.php?mmqy2nzmgzd

 

 

And I'm running a LG 32" 1080P TV and a NEC 20.1" LCD (1680x1050) both by DVI (TV is DVI-HDMI cable). 100% working. 100% openCL goodness (mind you it's an EVGA Superclocked card so a bit better than normal benchies).

 

 

So I'm a content Graphic Designer

 

 

Hi Philz.

 

Wanted to get my hands on the guide to fix a certain GTX 260. The link you have posted is reported to be private.

can you send me another link or the file?

Or Can you please share your DSDT, if you've added the DSDT code for your GTX 260 in it? That is if you are using a GTX 260.

 

Please, reply soon if possible.

 

Regards,

Freaky Chokra : :pirate2:

[FKA]

currently booting DSDT injection for GPU and guess what .... mirror displays works !!!

 

Top HOle Smith@@ for helping me

 

This DSDT patch works for GTX260 - in fact it fixes a mirror display issues I had with GraphicsEnabler.

 

                Device (GFX0)
               {
                   Name (_ADR, Zero)
                   Name (_SUN, One)
                   Method (_DSM, 4, NotSerialized)
                   {
                       Store (Package (0x1C)
                           {
                               "@0,compatible", 
                               Buffer (0x0B)
                               {
                                   "NVDA,NVMac"
                               }, 

                               "@0,device_type", 
                               Buffer (0x08)
                               {
                                   "display"
                               }, 

                               "@0,display-cfg", 
                               Buffer (0x04)
                               {
                                   0x03, 0x01, 0x00, 0x00
                               }, 

                               "@0,name", 
                               Buffer (0x0F)
                               {
                                   "NVDA,Display-A"
                               }, 

                               "@1,compatible", 
                               Buffer (0x0B)
                               {
                                   "NVDA,NVMac"
                               }, 

                               "@1,device_type", 
                               Buffer (0x08)
                               {
                                   "display"
                               }, 

                               "@1,display-cfg", 
                               Buffer (0x04)
                               {
                                   0xFF, 0xFF, 0x00, 0x01
                               }, 

                               "@1,name", 
                               Buffer (0x0F)
                               {
                                   "NVDA,Display-B"
                               }, 

                               "NVCAP", 
                               Buffer (0x18)
                               {
                                   /* 0000 */    0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 
                                   /* 0008 */    0x1C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0010 */    0x00, 0x00, 0x00, 0x00
                               }, 

                               "NVPM", 
                               Buffer (0x1C)
                               {
                                   /* 0000 */    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0008 */    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0010 */    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0018 */    0x00, 0x00, 0x00, 0x00
                               }, 

                               "VRAM,totalsize", 
                               Buffer (0x04)
                               {
                                   0x00, 0x00, 0x00, 0x38
                               }, 

                               "device_type", 
                               Buffer (0x0C)
                               {
                                   "NVDA,Parent"
                               }, 

                               "model", 
                               Buffer (0x17)
                               {
                                   "nVidia GeForce 260 GTX"
                               }, 

                               "rom-revision", 
                               Buffer (0x06)
                               {
                                   "3172a"
                               }
                           }, Local0)
                       DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
                       Return (Local0)
                   }
               }
           }

 

NB this NVCAP is for Dual DVI and TV out ... havent tried the HDTV out on this card yet though !!

 

Enjoy

D

[Jocelyn84]

I already own two 260's (216 core) and they're working fine, but just picked up a 192 core for cheap on another forum. Its for a second system, and I'm wondering if anyone has a 192 core working or if I might run into problems???

 

Thanks in advance

[FKA]

I already own two 260's (216 core) and they're working fine, but just picked up a 192 core for cheap on another forum. Its for a second system, and I'm wondering if anyone has a 192 core working or if I might run into problems???

 

Thanks in advance

 

im 216 .. sorry cant help

[Wallstreet]

I've got a EVGA 260 GTX Core 216 SC and an EVGA 260 GTX 192 Superclocked both running fine with the following string in /Extra/com.apple.boot.plist. The SLI bridge is connected, and SLI works great in Win7 (Thanks to x986123 on InfiniteMac - He has 2 MSIs, one 216 and one 192). This has been tested on 2 different motherboards across 3 different vendors and works under 10.6.2/3:

 

<key>device-properties</key>
<string>8e0700000100000002000000c10300001500000002010c00d041030a000000000101060000030
101060000007fff04003a000000400032002c0068007700730065006e0073006f0072002d0070006
1
00720061006d0073002d00760065007200730069006f006e00000008000000000000022200000040
0
032002c006400650076006900630065005f0074007900700065000000120000004e5644412c67707
5
2d64696f64650e0000004e00560050004d0000002000000001000000000000000000000000000000
0
000000000000000000000001e00000072006f006d002d007200650076006900730069006f006e000
0
00090000003331373261100000004e00560043004100500000001800000004000000000003000c00
0
000000000070000000022000000400032002c002300730069007a0065002d00630065006c006c007
3
000000080000000000000022000000400030002c006400650076006900630065005f007400790070
0
0650000000b000000646973706c6179100000006d006f00640065006c0000001a0000004e5649444
9
41204765466f726365204754582032363014000000400030002c006e0061006d0065000000120000
0
04e5644412c446973706c61792d4120000000400032002c0063006f006d007000610074006900620
0
6c0065000000160000004e5644412c73656e736f722d706172656e7414000000400031002c006e00
6
1006d0065000000120000004e5644412c446973706c61792d4212000000400032002c00720065006
7
00000008000000000000021c0000006400650076006900630065005f007400790070006500000010
0
000004e5644412c4765466f72636520000000400031002c0063006f006d007000610074006900620
0
6c00650000000e0000004e5644412c4e564d616326000000400032002c0023006100640072006500
7
30073002d00630065006c006c007300000008000000000000010e0000006e0061006d00650000000
f
0000004e5644412c506172656e7422000000400031002c006400650076006900630065005f007400
7
9007000650000000b000000646973706c617920000000400030002c0063006f006d0070006100740
0
690062006c00650000000e0000004e5644412c4e564d6163220000005600520041004d002c007400
6
f00740061006c00730069007a0065000000080000000000003836000000400032002c00680077006
3
00740072006c002d0070006100720061006d0073002d00760065007200730069006f006e00000008
0
000000000000214000000400032002c006e0061006d00650000001100000073656e736f722d70617
2
656e74c10300001500000002010c00d041030a000000000101060000070101060000007fff04003a
0
00000400032002c0068007700730065006e0073006f0072002d0070006100720061006d0073002d0
0
760065007200730069006f006e000000080000000000000222000000400032002c00640065007600
6
900630065005f0074007900700065000000120000004e5644412c6770752d64696f64650e0000004
e
00560050004d00000020000000010000000000000000000000000000000000000000000000000000
0
01e00000072006f006d002d007200650076006900730069006f006e0000000900000033313732611
0
0000004e00560043004100500000001800000004000000000003000c000000000000070000000022
0
00000400032002c002300730069007a0065002d00630065006c006c0073000000080000000000000
0
22000000400030002c006400650076006900630065005f00740079007000650000000b0000006469
7
3706c6179100000006d006f00640065006c0000001a0000004e5649444941204765466f726365204
7
54582032363014000000400030002c006e0061006d0065000000120000004e5644412c446973706c
6
1792d4120000000400032002c0063006f006d00700061007400690062006c0065000000160000004
e
5644412c73656e736f722d706172656e7414000000400031002c006e0061006d0065000000120000
0
04e5644412c446973706c61792d4212000000400032002c007200650067000000080000000000000
2
1c0000006400650076006900630065005f0074007900700065000000100000004e5644412c476546
6
f72636520000000400031002c0063006f006d00700061007400690062006c00650000000e0000004
e
5644412c4e564d616326000000400032002c0023006100640072006500730073002d00630065006c
0
06c007300000008000000000000010e0000006e0061006d00650000000f0000004e5644412c50617
2
656e7422000000400031002c006400650076006900630065005f00740079007000650000000b0000
0
0646973706c617920000000400030002c0063006f006d00700061007400690062006c00650000000
e
0000004e5644412c4e564d6163220000005600520041004d002c0074006f00740061006c00730069
0
07a0065000000080000000000003836000000400032002c00680077006300740072006c002d00700
0
6100720061006d0073002d00760065007200730069006f006e000000080000000000000214000000
4
00032002c006e0061006d00650000001100000073656e736f722d706172656e74</string>

[Jocelyn84]

I've got a EVGA 260 GTX Core 216 SC and an EVGA 260 GTX 192 Superclocked both running fine with the following string in /Extra/com.apple.boot.plist. The SLI bridge is connected, and SLI works great in Win7 (Thanks to x986123 on InfiniteMac - He has 2 MSIs, one 216 and one 192).

 

I already have two 216's working on my main system (my sig) with a much simpler DSDT edit, but thanks for letting me know 192 core cards are working.

[FKA]

currently booting DSDT injection for GPU and guess what .... mirror displays works !!!

 

Top HOle Smith@@ for helping me

 

This DSDT patch works for GTX260 - in fact it fixes a mirror display issues I had with GraphicsEnabler.

 

                Device (GFX0)
               {
                   Name (_ADR, Zero)
                   Name (_SUN, One)
                   Method (_DSM, 4, NotSerialized)
                   {
                       Store (Package (0x1C)
                           {
                               "@0,compatible", 
                               Buffer (0x0B)
                               {
                                   "NVDA,NVMac"
                               }, 

                               "@0,device_type", 
                               Buffer (0x08)
                               {
                                   "display"
                               }, 

                               "@0,display-cfg", 
                               Buffer (0x04)
                               {
                                   0x03, 0x01, 0x00, 0x00
                               }, 

                               "@0,name", 
                               Buffer (0x0F)
                               {
                                   "NVDA,Display-A"
                               }, 

                               "@1,compatible", 
                               Buffer (0x0B)
                               {
                                   "NVDA,NVMac"
                               }, 

                               "@1,device_type", 
                               Buffer (0x08)
                               {
                                   "display"
                               }, 

                               "@1,display-cfg", 
                               Buffer (0x04)
                               {
                                   0xFF, 0xFF, 0x00, 0x01
                               }, 

                               "@1,name", 
                               Buffer (0x0F)
                               {
                                   "NVDA,Display-B"
                               }, 

                               "NVCAP", 
                               Buffer (0x18)
                               {
                                   /* 0000 */    0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 
                                   /* 0008 */    0x1C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0010 */    0x00, 0x00, 0x00, 0x00
                               }, 

                               "NVPM", 
                               Buffer (0x1C)
                               {
                                   /* 0000 */    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0008 */    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0010 */    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
                                   /* 0018 */    0x00, 0x00, 0x00, 0x00
                               }, 

                               "VRAM,totalsize", 
                               Buffer (0x04)
                               {
                                   0x00, 0x00, 0x00, 0x38
                               }, 

                               "device_type", 
                               Buffer (0x0C)
                               {
                                   "NVDA,Parent"
                               }, 

                               "model", 
                               Buffer (0x17)
                               {
                                   "nVidia GeForce 260 GTX"
                               }, 

                               "rom-revision", 
                               Buffer (0x06)
                               {
                                   "3172a"
                               }
                           }, Local0)
                       DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
                       Return (Local0)
                   }
               }
           }

 

NB this NVCAP is for Dual DVI and TV out ... havent tried the HDTV out on this card yet though !!

 

Enjoy

D

 

Not 100% happy with this .

 

When playing 720 or 1080 video with VLC (1.0.5 and 64 bit beta versions.) and 32 or 64 bit kernel I get a horizontal split in the video about midway down the screen.

 

Don't get that with GraphicsEnabler or EFI string - any ideas appreciated !?

 

D

[FKA]

Not 100% happy with this .

 

When playing 720 or 1080 video with VLC (1.0.5 and 64 bit beta versions.) and 32 or 64 bit kernel I get a horizontal split in the video about midway down the screen.

 

Don't get that with GraphicsEnabler or EFI string - any ideas appreciated !?

 

D

 

This is only happening with my 2 displays mirrored.

Thought it might be due to a mismatch with the monitors - but both are set to 1920x1080 60Hz so can't see it being that - however 1 has DVI the other HDMI (that shouldn't matter either!)

 

So maybe down to the @0,display-cfg values I'm using??

Haven't had chance yet to try the other values smith@@ posted here post29.

 

Is there any way to determin the correct values for @0,display-cfg and @1,display-cfg for the GTX260?

 

D.

[Smith@@™]

hi, i don't think that other values can works. Have you try OTHER player? I don't use vlc in mirror, simply because, with monitor with not same resolution, vlc in mirror on snow give me black screen. With divx player instead also with monitor with not same resolution all work good.

 

i'll investigate...

[FKA]

hi, i don't think that other values can works. Have you try OTHER player? I don't use vlc in mirror, simply because, with monitor with not same resolution, vlc in mirror on snow give me black screen. With divx player instead also with monitor with not same resolution all work good.

 

i'll investigate...

 

same with QT+Perian and DIVX player ... I'm not a big DIVX play fan. VLC has always been the best 'play all' media player for me ..

 

I've just noticed I only see the horizontal split (and only when there is motion.) on my BENQ G2222HDL DVI monitor. My LG HDMI LCD TV is fine.

 

The BENQ came with drivers for Win7 (can't find any for 10.6) so this could be the problem (any dynamic backlight etc is turned off.) - but saying that why does it play back fine in none mirror mode?!

 

Let me know if you find anything out. I don't have to use mirror but the more I have used it the more I'm liking it .

 

Cheers

D.

[Smith@@™]

same with QT+Perian and DIVX player ... I'm not a big DIVX play fan. VLC has always been the best 'play all' media player for me ..

 

I've just noticed I only see the horizontal split (and only when there is motion.) on my BENQ G2222HDL DVI monitor. My LG HDMI LCD TV is fine.

 

The BENQ came with drivers for Win7 (can't find any for 10.6) so this could be the problem (any dynamic backlight etc is turned off.) - but saying that why does it play back fine in none mirror mode?!

 

I don't have to use mirror but the more I have used it the more I'm liking it .

 

Cheers

D.

 

Hi friend,i'm agrre with you about vlc and not divx player, but i was referring to mirror mode about. With vlc both screen are black in mirror mode WITH a movie in total screen, in full screen. Instead with divxplayer in full screen ALL works amazing, also the movie in full screen. So i have say to you to test with another soft

 

Also I don't use the mirror mode, it's only for "test" ...

 

My problem is that i have not two monitor full or hd ready for see with my eyes your problem.

 

Let me know if you find anything out.

 

Sure

 

 

Edit: improved explanation ...

[FKA]

With vlc both screen are black in mirror mode WITH a movie in total screen, in full screen.

 

That's not good!

D

[Smith@@™]

That's not good!

D

 

Eh?

That this is not good.. i know!

 

 

But we speak the same language, more or less, in this green earth of god?

 

With vlc both screen are black in mirror mode WITH a movie in total screen, in full screen. Instead with divxplayer in full screen ALL works amazing, also the movie in full screen. So i have say to you to test with another soft.

 

The problem for me,in this case, is vlc, ONLY vlc!

 

By;)

 

Keep me posted...

[FKA]

Have extracted and tried to inject GPU BIOS rom file using the method in post No. 71 here but it has made no difference to the mirrored monitor fault or the performance of the GPU.

 

D

[dacanayl]

Hey guys, i'm a long time mac user hoping to build my first hack soon and have a few questions regarding GPU choice. I'd like to use the GTX 260 SLI in windows 7 for gaming but i'm concerned 10.6.3 won't recognize both GPUs and fail to boot. Looks like others in this thread not only have two GPUs but have SLI working in 10.6.3? So it's actually possible to have SLI operational in either SL or win7? That's amazing! If i'm wrong please correct me so I know what to expect as I didn't think SLI in SL was possible. If I can run SL so that it at least recognizes one of the cards, does the second card keep running regardless?

 

I'm building from scratch (will start purchasing parts in 1-2 wks) so if anyone has advice regarding components or even if it would be better to wait for 10.6.4 to see what GPU support develops i'd be open to suggestions. Judging from other posts I've come across, the gigabyte x58a-ud3r + i7 920 + gtx 260 x2 might be a good match?

 

Thanks much and I'm grateful this forums exists!

Leo

[FKA]

Hey guys, i'm a long time mac user hoping to build my first hack soon and have a few questions regarding GPU choice. I'd like to use the GTX 260 SLI in windows 7 for gaming but i'm concerned 10.6.3 won't recognize both GPUs and fail to boot. Looks like others in this thread not only have two GPUs but have SLI working in 10.6.3? So it's actually possible to have SLI operational in either SL or win7? That's amazing! If i'm wrong please correct me so I know what to expect as I didn't think SLI in SL was possible. If I can run SL so that it at least recognizes one of the cards, does the second card keep running regardless?

 

I'm building from scratch (will start purchasing parts in 1-2 wks) so if anyone has advice regarding components or even if it would be better to wait for 10.6.4 to see what GPU support develops i'd be open to suggestions. Judging from other posts I've come across, the gigabyte x58a-ud3r + i7 920 + gtx 260 x2 might be a good match?

 

Thanks much and I'm grateful this forums exists!

Leo

 

Like crossfire I don't think SLI will work in a Hack. Two independant cards however will work.

 

D

 

Have extracted and tried to inject GPU BIOS rom file using the method in post No. 71 here but it has made no difference to the mirrored monitor fault or the performance of the GPU.

 

D

 

Re: the mirror'd monitor issue -

 

Noticed last night I actually get this fault with windows 7 also only on the my HDMI LG LCD rather than the DVI BENQ.

 

It's either a 'feature' of this card or down to a missmatch between the monitors.

 

D.

[dacanayl]

Are you saying that OS X won't boot with a SLI setup or that it simply won't recognize the second card? My intention is to have the second gtx 260 for windows gaming so I'm ok with os x only utilizing the first card. Now I see that some people have their setups with SLI in their sig (ie, jocelyn84) and I'm confused as to how they get os x running.