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[HELP] Z77X-UP7 - 16GB - DUAL GTX 660


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#1
Xpsycho

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Hello everyone, I am having a problem that I can't seem to fix. I have built many hackintosh systems over the years and not had many problems that I couldn't fix however this is the first time I am completely stumped.

System Specs:
Gigabyte Z77X-UP7 motherboard
Intel core i7-3770k processor
Kingston HyperX Blu 32GB Ram
OCZ Vector 256gb SSD
EVGA GTX 660 video
Cooler Master V6 GT cooler
Cooler Master Cosmos II Case

I have built the system and everything works perfect with a single video card. The minute I install my second video card and hook up the SLI cable, my system freezes during Boot up. I figured a motherboard issue so I tried to install windows 8 on the drive. The windows 8 boots perfect and runs great.

I am hoping one of the gurus here can help me out to figure out what is happening and why.



#2
iFIRE

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I´m not sure100%, but 99% that Mac OS X don`t support SLI Mode

#3
Xpsycho

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No OSX doesn't support SLI however on my other hack it works perfect. I honestly think it has something to do with the motherboard and osx. I have a gigabyte z77-ud5h with dual cards in SLI and it works fine.

#4
Rampage Dev

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Does this happen when the SLI bridge is installed?

#5
Xpsycho

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It happens regardless if the SLI cable is installed or not. As long as both cards are in, it happens..

#6
Rampage Dev

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Was this a retail install?

#7
Xpsycho

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Yes. But I think I found my problem. I may be running out of power to fully function. I have a 750 watt OCZ power supply trying to power the everything including 10 3tb seagate 7200 rpm drives, 2 2tb sea gate 7200 rpm drives, a Blu-ray drive and a DVD burner. Time to try a new power supply.

Ok still doesn't make sense. I have disconnected everything, installed just processor, fan, 256gb SSD, 2 video cards.

Booted into Mac and windows perfect.

Installed my rocketraid 2720sgl and booted into windows perfect but when I tried to go into Mac, freeze!

If I pull my 2nd video card, it boots into Mac perfect as well.

I am stumped.

#8
Rampage Dev

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I´m not sure100%, but 99% that Mac OS X don`t support SLI Mode


Not in a straight forward manner. It is Apples personal opinion that multi GPU support is at the Application level and not a Apples level. Apps like CS6 After Effects,, CS6 Premier and Black Magics Di Vinci Resolve all support SLI under Mac OS X. This does not require a bridge and therefor is not as efficient. But it still is SLI.

Yes. But I think I found my problem. I may be running out of power to fully function. I have a 750 watt OCZ power supply trying to power the everything including 10 3tb seagate 7200 rpm drives, 2 2tb sea gate 7200 rpm drives, a Blu-ray drive and a DVD burner. Time to try a new power supply.

Ok still doesn't make sense. I have disconnected everything, installed just processor, fan, 256gb SSD, 2 video cards.

Booted into Mac and windows perfect.

Installed my rocketraid 2720sgl and booted into windows perfect but when I tried to go into Mac, freeze!

If I pull my 2nd video card, it boots into Mac perfect as well.

I am stumped.


Not power. You can't be pulling more the 550 WATTS.

Can you boot into the USB installer with both cards installed and can you post a screen shot of the code where it locks up.

#9
Xpsycho

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Thank you for all your help. I got it figured out. I moved my video cards into the pic-e x16 slot 3&4 and put my rocketraid card into the pic-e x8-1 slot, fired it up with SLI cable on and BAM triple monitor fired up, I jumped for joy, and now if anyone else experiences this problem, there is finally a solution..

#10
theconnactic

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Not in a straight forward manner. It is Apples personal opinion that multi GPU support is at the Application level and not a Apples level. Apps like CS6 After Effects,, CS6 Premier and Black Magics Di Vinci Resolve all support SLI under Mac OS X. This does not require a bridge and therefor is not as efficient. But it still is SLI.


Is the same valid for Crossfire at app level?

#11
Rampage Dev

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Is the same valid for Crossfire at app level?


Yes, but I do not know of any that openly do this for AMD/ATI.

#12
theconnactic

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Good to know. I used to think SLI wasn't supported at all. So it is, yet at app level. Does that mean that dual cards like the 690 and the 7990 are also supported at app level?

P.S.: one thing is not straight yet: if SLI is supported only at app level, and the SLI bridge it's unnecessary altogether, why didn't Xpsycho system accept to boot without the SLI cable?

#13
Rampage Dev

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Good to know. I used to think SLI wasn't supported at all. So it is, yet at app level. Does that mean that dual cards like the 690 and the 7990 are also supported at app level?


590 and 690 are supported.

7990 is not supported at all due to a addressing issue with the card.

#14
theconnactic

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I know they can boot fine, QE/CI and all - there's a MacMod of the month build, Mufasa, that uses the 690. The question is, are they supported as dual cards at least at application level under OSX?
Thanks for the info about the 7990.

#15
Xpsycho

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My system is using the SLI cable. If I disable the cable, it won't boot. The downfall to this is that I have yet to get the SLI capabilities working under MAC. I strictly use the SLI portion for Windows Gaming.

#16
Rampage Dev

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My system is using the SLI cable. If I disable the cable, it won't boot. The downfall to this is that I have yet to get the SLI capabilities working under MAC. I strictly use the SLI portion for Windows Gaming.


Your not understanding what I am talking about. SLI does NOT WORK IN MAC OS X and only at application level.

#17
Xpsycho

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Well after I thought I fixed the problem, I was wrong. While my system would boot fine with the way I moved my stuff around, it didn't change. I tried to access my raid drives once I got it up and running and no raid drives so back to square one. I think I am going to have to talk to Gigabyte for this or try a different raid card.

#18
Rampage Dev

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Well after I thought I fixed the problem, I was wrong. While my system would boot fine with the way I moved my stuff around, it didn't change. I tried to access my raid drives once I got it up and running and no raid drives so back to square one. I think I am going to have to talk to Gigabyte for this or try a different raid card.


I have the same RAID card and it works fine. What format is the RAID and are you booting off the RAID card?

#19
Xpsycho

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I am not booting off the raid. If I pull my second video card, It will work fine with the raid card. The only problem is when I stick a second video card in. I was thinking it was something with the motherboard but it works fine with windows. Just not mac. I have the drives set up as Raid 5/0.

The motherboard I have is the Z77X-UP7 which advertises (4) PCI-E x16 slots EVEN when populated, they are supposed to stay X16 which I am starting to dis-believe. I know with my other system running the Z77X-UD5H, If I use one slot it is X16, 2 = X8, and 3= X4 which won't work with the raid card because it requires X8 slot.

#20
Rampage Dev

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I am not booting off the raid. If I pull my second video card, It will work fine with the raid card. The only problem is when I stick a second video card in. I was thinking it was something with the motherboard but it works fine with windows. Just not mac. I have the drives set up as Raid 5/0.

The motherboard I have is the Z77X-UP7 which advertises (4) PCI-E x16 slots EVEN when populated, they are supposed to stay X16 which I am starting to dis-believe. I know with my other system running the Z77X-UD5H, If I use one slot it is X16, 2 = X8, and 3= X4 which won't work with the raid card because it requires X8 slot.


Your lanes will NEVER run at those speeds.... unless.... you use PCIe 3.0 cards. There is no card on the market at the moment which really use the 3.0 bandwidth. So when you have SLI installed:

x8 x8 x8 x8 PCIe 3.0 when converted into the 2.0 standard it is x16 x16 x16 x16 when it comes to bandwidth which is what they use to advertise.

My Asus MB has a feature to help compatibility per lane and can set what standard it uses. Not sure about yours...





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