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SLI causing hard freeze?

post #1 of 10
4/15/12 at 9:11am
Thread Starter 
Hello everyone. I've recently bought another gtx 560 ti for my computer and so i had to change my motherboard too since the old one didn't support SLI. Well first of all i haven't noticed about any increase in performance when playing games (not too many atm) or when running msi kombustor benchmark. Secondly when playing BF3 with SLI enabled it runs horribly... it's worse than with just 1 card and after 5-15 minutes of gameplay the whole computer freezes and i'm forced to restart. At first i thought it was only BF3 but then it happened with Left 4 Dead 2 (after about 1 hour of gameplay). I didn't find any answer to this problem except people just telling to re-install GPU drivers but i have done this many times and have tried the newest BETA drivers and also the latest WHQL driver. Everything works normally when SLI is disabled so i don't suppose it's the new motherboard which is a P8P67- EVO. So does anyone have any idea what might be causing this bad performance and freezing? Any help is appreciated... thanks.

specs:

i5 2500k
2x 4gb kingston hyperX 1600mhz RAM
2x msi twin frozr gtx 560 ti 1gb in SLI
Asus p8p67 evo
Corsair GS800w psu
Edited by Edisoni - 4/15/12 at 9:18am
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post #2 of 10
4/15/12 at 9:15am
I'll ask the two obvious questions - what PSU do you have, and have you put the sli bridge on? biggrin.gif
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space heater
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Hard DriveOptical DriveCoolingOS
2x500GB F3s SS RAID0, 1x1TB F3 LiteOn IHAS124 Noctua NH-D14 W764 Pro, Fedora 14, FreeBSD 
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Acer GD245HQ (120hz) LG W2420P LG IPS231P HP ZR24w 
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LG 32LH3000 (w/IPS) razer bwu. dampened. LEDs replaced. Caps replaced. Antec TruePower New 650W Casecom 6788 (£29 case:)) 
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Modified original G5 Asus Xonar PCIe Sennheiser HD595 Tannoy Mercury 5 
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NAD C165BEE Bowers & Wilkins 683 Cambridge Audio DACMagic+ 
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post #3 of 10
4/15/12 at 9:17am
Thread Starter 
oh yes the psu.. it's a corsair GS800w and yes i have installed the bridge
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post #4 of 10
4/15/12 at 9:21am
Have you tried resitting the 2nd GPU and checking if it's being detected?
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RAMHard DriveHard DriveHard Drive
Corsair Dominator 8GB DDR3 1600MHz CL8 8-8-8-24 1TB Samsung spinpoint F3 1TB Samsung spinpoint F3 1TB Samsung spinpoint F3 
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Intel X25-M SSD 120GB LITE-ON USB 2.0 External XSPC Raystorm  XSPC EX360 Rad  
CoolingCoolingCoolingCooling
XSPC EX120 Rad  XSPC Duel bay res w/VPP655 Pump Primoflex white tubing 1/2ID, 3/4OD Swiftech Komodo 7970 
CoolingOSMonitorMonitor
Swiftech Komodo 7970 - SOON Windows 7 Premium 64 bit Dell U2412M - SOON Dell U2412M - SOON 
MonitorKeyboardPowerCase
Dell U2412M - SOON Corsair Vengeance K90 Corsair AX1200 w/Black carbon fiber Caselab Magnum M10 w/Custom window 
MouseMouse PadAudioOther
Cyborg R.A.T 7 Infection Cyborg G.L.I.D.E 7 Corsair Vengeance 1500 Koolance QDC Extreme Flow No-Spill, Female ID:1... 
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Bitfenix 3-Pin to 3x 3-Pin Y Cable Splitter red Bitfenix 3-Pin to 3x 3-Pin Y Cable Splitter red  Phantek 120mm 1300RPM ModRight FilterRight Square Design 120mm 
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ModRight FilterRight Square Design 120mm ModRight FilterRight Square Design 120mm Koolance QDC Extreme Flow No-Spill, Male ID:1/2... ModRight FilterRight Square Design 120mm 
OtherOtherOtherOther
ModRight FilterRight Square Design 120mm ModRight FilterRight Square Design 120mm  120mm Black fan grill  BitFenix Alchemy Connect™ 30 LED Light Strip Red 
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BitFenix Alchemy Connect™ 30 LED Light Strip Red DEMCiflex magnetic filter GT AP-15's 1850RPM sleeved red   Phantek 120mm 1300RPM 
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GT AP-15's 1850RPM sleeved red  120mm Black fan grill GT AP-15's 1850RPM sleeved red GT AP-15's 1850RPM sleeved red 
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Phantek 120mm 1300RPM  Phantek 120mm 1300RPM  120mm Black fan grill  Phantek 120mm 1300RPM 
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post #5 of 10
4/16/12 at 12:27am
Thread Starter 
well i can see both of them in the nvidia control panel so i guess they're detected? and oh, instead of msi kombustor i tried furmark this time and i did get a better score with SLI enabled. but still, this freezing worries me. gotta try some more games and see if i get a difference in performance...
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post #6 of 10
4/18/12 at 12:28pm
Thread Starter 
when SLI is enabled the FPS is almost 2 times better than with just one card in games like Skyrim, Killing Floor and Left 4 dead 2 but i get this weird stuttering when moving my mouse that doesn't show up in the FPS. what could be causing this? and also BF3 was still unplayable. Also when running SLI the 1st GPU gets WAY hotter than when using only 1 card. Could the problem be with my motherboard? How could i test if my motherboard is defective? ps. the new mobo (p8p67 EVO) has a slight delay when booting the pc. It's only like 1 second but still I didn't have this kinda thing on my previous boards. Could this be something to think about?
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post #7 of 10
4/18/12 at 12:46pm
Same thing happens to me with SLI gtx460's. My computer completely freezes with BF3 and Skyrim. I've ask around and no one seems to know the problem. I got sick of it and just went with single 570.
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post #8 of 10
4/18/12 at 12:58pm
The top card will always get hotter! Think about it! I'm sure you'll work out why thumb.gif

Are you using a wireless mouse? If so, try lowering the poll rate!
And make sure your mouse and keyboard are plugged in the USB 2.0 ports! Not the USB 3.0 ports smile.gif

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post #9 of 10
4/19/12 at 8:10am
Hi Edisoni. May be obvious but install each card alone to see how they behave. Might just be one of them giving you problems.

Harry @ Videocardshop.co.uk.
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post #10 of 10
4/19/12 at 8:48am
Thread Starter 
I decided to play it safe and returned the other card while I still could. Didn't wanna get stuck with a POSSIBLY defective card so... Anyway, I'm still eager to know what was causing this if someone might have an idea, but the bad thing is I'm unable to tinker with the SLI at the moment so I can't test it anymore. Basically this isn't my main concern anymore so no one has to go extremes trying to solve this.

Thanks to everyone who replied. And I'm still hoping for suggestion on what might have been the problem.
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