Sapphire R9 295x2 Doesn't appear to be using both GPU's - runs very poorly, low fps

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Mekkalyn

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Jun 11, 2015
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I have purchased a Sapphire R9 295x2, which to my understand is supposed to be a very powerful card.

I purchased a EVGA Supernova 1000 p2 power supply with the graphics card and installed them at the same time, since my old power supply was a 550watt. I tried running games expecting a huge increase in performance, to be met with barely an increase at all in FPS (with the exact same settings as my old card).

I realized that my motherboard did not support a second GPU at x16 speed, so I purchased a new one: Gigabyte 990fxa-ud3 that would run them both at x16. I did not get any increase in performance.

I looked in GPU-Z while running The Witcher 3 and noticed that my second GPU doesn't seem to be working. I will include a screenshot of my GPU-Z logs. One gets 100% GPU load, and the second one barely does anything. The 100% one is getting 80-100watts and the one that does nothing gets like 10w. I also have AMD crossfire enabled. I tried disabling it to see if it made a difference, and it didn't seem to do anything (same FPS).

I have done a complete uninstall/reinstall of my AMD drivers (beta and nonbeta).
I have updated my bios.
I have not done any overclocking or messed with any values.

Here are my specs -
CPU: AMD FX-8350 8 core 4.0 mhz
RAM: 4 gb ddr3 800 mhz G.skill (2 sticks)
Motherboard: Gigabyte 990fxa-ud3
GPU: Sapphire Radeon R9 295x2

Here are screenshots of my GPU-Z log -
ohmelv.jpg

2eo9y6x.jpg


If there is any other information you need, I will supply it.
Any help would be appreciated.
 
Solution

You seem to be spot on with Tomb Raider. This is with TressFX off.
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_980_Ti/25.html
tombraider_1920_1080.gif



I'm definitely going to point the finger at your AMD CPU. All the TechPowerUp results, which had the Witcher 3 showing only 41 FPS at 1080p and slower than a single 290, were obtained on a bit more powerful system.

Intel Core i7-4770K @ 4.2 GHz (Haswell, 8192 KB Cache)
Motherboard...

You seem to be spot on with Tomb Raider. This is with TressFX off.
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_980_Ti/25.html
tombraider_1920_1080.gif



I'm definitely going to point the finger at your AMD CPU. All the TechPowerUp results, which had the Witcher 3 showing only 41 FPS at 1080p and slower than a single 290, were obtained on a bit more powerful system.

Intel Core i7-4770K @ 4.2 GHz (Haswell, 8192 KB Cache)
Motherboard: ASUS Maximus VI Hero Intel Z87
Memory: 16 GB DDR3 @ 1600 MHz 9-9-9-24

You're not going to match that with your AMD FX-8350. I doubt the driver update is going to completely make up the difference either.
 
Solution



Alright, thank you very much. That will have to be my next upgrade.