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7950 crossfire crashing

maglue
By maglue
in Graphics Cards
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Posted

I have hd issues with my crossfire 7950's.
When the second card is in the system crashes under load.
I thought it was the psu but have since changed to a TX 750M.It still crashes
They only thing i have not is the motherboard. Could i motherboard cause such a problem?

My system is:
asrock 970 extreme 3
fx 8320
8 gb ripjaw gskills ram
two 7950's in crossfire
Aswell as about 6 fans 
1 hdd
1 ssd
TX 750M

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Do you know what temps they're running at load?

CPU: 5820k 4.5Ghz 1.28v, RAM: 16GB Crucial 2400mhz, Motherboard: Evga X99 Micro, Graphics Card: GTX 780, Water Cooling: EK Acetal CPU/GPU blocks,


240mm Magicool slim rad, 280mm Alphacool rad, D5 Vario pump, 1/4 ID 3/4 OD tubing, Noctua Redux 140/120mm fans. PSU: Evga 750w G2 SSD: Samsung 850 Pro 256GB & Seagate SSHD 2TB Audio: Sennheiser HD558s, JBL! speakers, Fiio E10k DAC/Amp Monitor: Xstar DP2710LED @ 96hz (Korean Monitor) Case: Fractal Node 804

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https://linustechtips.com/topic/67260-7950-crossfire-crashing/#findComment-920323
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Have you tried replacing GPU 1 with GPU 2 and just running GPU 2 under load?

 

Your 2nd card may be faulty/unstable.

<p>Mobo - Asus P9X79 LE ----------- CPU - I7 4930K @ 4.4GHz ------ COOLER - Custom Loop ---------- GPU - R9 290X Crossfire ---------- Ram - 8GB Corsair Vengence Pro @ 1866 --- SSD - Samsung 840 Pro 128GB ------ PSU - Corsair AX 860i ----- Case - Corsair 900D

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https://linustechtips.com/topic/67260-7950-crossfire-crashing/#findComment-920401
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Make sure the ULPS "ultra low power state" or something like that is disabled, it should automatically disable itself once you launch a game, but some times it doesn't, so you have to manually disable it from the windows registry.

 

Edit: Run GPU-z, and see if the 2nd GPU has its 384-bit "Bus width", if it doesn't then its ULPS messing with your crossfire.

Main rig. Updated :D CPU: FX8350 @stock Cooler: Corsair h110 Motherboard: Ga-990fxa-ud5 Memory: Corsair Vengance 8Gigs 1866Mhz GPU: MSI GTX 970 SLI (blower cooler)  PSU: Cooler Master Silent pro 850w SSD: Corsair Force GT 60Gb HDD: WD 500 Caviar blue Case: Thermaltake core V71 Fan controler: NZXT Sentry
 
Secondary PC: CPU: i5 4670k @stock Cooler: Thermaltake NIC L/31 Motherboard: Asus Z97I-PLUS Memory: Corsair Vengance 8Gigs 2133Mhz GPU: ZOTAC GTX 780 (Titan cooler) PSU: Antec 520m Pro SSD: Corsair Force GT 60Gb HDD: WD 500 Caviar blue & WD 2TB Green Case: Thermaltake core V1

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