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      Hello folks! As some things are being fixed, we'll keep you updated. Per hour the Forum Rules don't have a dedicated "Tab", so here is the place that we have our Rules back. New Users Lounge > [READ] - InsanelyMac Forum Rules - The InsanelyMac Staff Team. 
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GA-EP45T-UD3LR Xeon X5472 weird problem - SOLVED

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Before I ask you guys for help I googled for hours and found nothing. 

 I got myself new/old board: GA-EP45T-UD3LR and Xeon X5472. I modified 775 socket for 771 and Xeon cpu with sticker.

Under Windows everything works perfectly, I tested CPU with Intel utility and run various stress tests for GPU/CPU and memory. Not a single glitch. System running stable at stock 3Ghz, 1600FSB and DDR3 1600.


 I plugged my OSX HDD and it booted but system was behaving weirdly, windows were half opening and sometimes it wasn't displaying anything in finder, some icons froze on desktop, proper screen artifacts. I have an GTX-760 and HD5770 to swap, both used to work natively on my old motherboard.

Right I thought new hardware needs new system. I Installed Niresh Mavericks distro as only thing working was a  PC. I had the same problems with displaying when installing, it sometimes become unresponsive on the welcome screen, sometimes freeze on grey screen. I managed to install but glitches are still there. I tested with 2 different graphics card, same thing.

 System works but display freeze sometimes or showing stuff with delay. I tried all the boot flags and no difference.


Many thanks for any input. I will post pictures tomorrow.  

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Hi,try to use smbios to MacPro 3.1 first

i use boot flag for Xeon  tscsync npci=0x2000

good hack

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Thank you so much for your answer.  It working ok-ish with cpus=1 flag, at least I can do something. 


I see you've got similar setup. I will try tscsync thing now.  Are you using Chameleon or Clover?


I found this ironic that I got problem with CPU used on real MacPro 3.1 :)




I'm pleased to inform that after installing tscsync package all 4 cores are working and there is no more screen artefacts.


Many thanks Husaber. I owe you a beer or two :)

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i need five beeer :hysterical:

and it's very good info from you,hackintosh work like champ with this modded processor :drool:

But not everyone can do it use.. :hysterical:

Cheers and GOOD HACK


PS-you check speedstep?work or no?

in terminal command-

ioreg -lw0 | grep PerformanceStateArray
ioreg -lw0 | grep CSTInfo
kextstat | grep LPC

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I got this after typing first command:

    | | |       "PerformanceStateArray" = (<b80b0000c05d00000a0000000a0000002147000021470000>,<f00a0000805700000a0000000a0000002107000021070000>,<280a0000405100000a0000000a0000002146000021460000>,<60090000004b00000a0000000a0000002106000021060000>)


nothing after second command and this after third:

49    0 0xffffff7f81193000 0x12000    0x12000    org.hwsensors.driver.LPCSensors (1018) <14 11 10 7 5 4 3>


Is that ok?


It sleeps ok and frequencies are changing in HW monitor, it's showing 4 cores at 2.4 or 3 GHz depends on load.

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