3 way 2 way crossfire crashing bsob r9 280x gigabyte windforce

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zak2501

Reputable
Feb 15, 2014
2
0
4,510
I7 4770k
16gb ram
MSI z87 gd 65
Corsair ax1200 watt PSU
3x r9 280x gigabyte oc windforce rev2

Games tried:
Uniengine 4.0
Garry's mod
Planet side 2
Mechwarrior online
Counterstrike source

Killawatt displays 360watts coming out from my PC which seems really low for 3 cards and 18 fans 2 pumps.
When the game starts to load the graphics I get a bsob or a black screen forcing me to reset. The cards all show 45-55c before the system crashes, they are not overclocked.
With 1 card games work fine.
Very frusterating. I'm using latest stable drivers. Gpuz reports 3 cards in crossfire and same with ccc.
2 monitors my gaming monitor is 1080p/144hz any help would be great. I am new to crossfire.
 
Solution
O
I may have your answer. After spending a couple days dealing with the SAME issue you were experiencing, I found out my root cause. All games that I would open crashed immediately as the cards kicked in the 3d rendering. I moved cards across the slots, tested them individually, and even moved cables around on my PSU. The problem seems to be with crossfire Radeon 280x cards trying to run a 144hz refresh rate. It might sound crazy, I know, but as soon as I dropped my refresh rate down to 120hz, all of my games would load again. When I kicked it back up to 144hz, crash/reboot again. Unbelievable.. I hope ATI fixes that issue so I can use my monitor at a refresh rate that is acceptable for single cards. Hope this helps..

CPU...
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iam2thecrowe

iam2thecrowe

Glorious
Jul 4, 2010
10,591
21
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well, if your new to crossfire, you should have done some research before you bought.
3 way crossfire is nearly always problematic, doesnt scale well, not good game support, does not support amd's frame pacing as far as im aware.
sell one of the cards and go with 2 way crossfire, its more than enough for 1080p.

To solve your problem start by removing one of the cards and get 2 way crossfire working with frame pacing, it will give you much smoother output of frames to your monitor, and often more performance than 3 cards.
 
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Z

zak2501

Reputable
Feb 15, 2014
2
0
4,510


I new some games have trouble, but I didn't know it was this bad.
I forgot to mention that I am having the same problem with setting it to just 2 gpus in ccc. Will completely removing the 3rd even though its not active in crossfire help?
 
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O

oconnr

Reputable
Apr 19, 2014
1
0
4,520
I may have your answer. After spending a couple days dealing with the SAME issue you were experiencing, I found out my root cause. All games that I would open crashed immediately as the cards kicked in the 3d rendering. I moved cards across the slots, tested them individually, and even moved cables around on my PSU. The problem seems to be with crossfire Radeon 280x cards trying to run a 144hz refresh rate. It might sound crazy, I know, but as soon as I dropped my refresh rate down to 120hz, all of my games would load again. When I kicked it back up to 144hz, crash/reboot again. Unbelievable.. I hope ATI fixes that issue so I can use my monitor at a refresh rate that is acceptable for single cards. Hope this helps..

CPU: 3.5ghz 3770k (OCed to 4.5ghz)
Monitor Ben Q XL2420TE
Gigabye 77X UDH5 mobo
2x Gigabyte Radeon R9 280x cards (not OCed)
 
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