Crossfire and psu problems

hardcorebluesct

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Feb 23, 2014
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Psu, cpu and crossfire setup different readings when doing tests. I'm running fx 8320 at 4.4 on sabertooth 990fx r2.0 with 2 r9 270x toxic in crossfire with corsair cx 750m psu. Now.....I run prime95 and furmark together full screen and what happens is my watts are like 840 (kill a watt installed) with 80 fps and 80% gpu usage and 100% cpu. When I turn all software of and turn it back on I get lag in furmark. 30-60 fps 40-60 % gpu usage and 640 watts and cpu at 100%. What can cause this readings? Bad psu? All help appreciated.
 
Solution
You computer is fine furmark is not a good way to test anymore and you should just do real world test or Heaven Benchmark 4.0, 3DMark,Valley Benchmark 1.0 and playing Games and you'll never have any problems it's just furmark is flawed

hardcorebluesct

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Feb 23, 2014
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I'm running fx 8320 at 4.4 on sabertooth 990fx r2.0 with 2 r9 270x toxic in crossfire with corsair cx 750m psu. Now.....I run prime95 and furmark together full screen and what happens is my watts are like 840 (kill a watt installed) with 80 fps and 80% gpu usage and 100% cpu. When I turn all software of and turn it back on I get lag in furmark. 30-60 fps 40-60 % gpu usage and 640 watts and cpu at 100%. What can cause this readings? Bad psu? All help appreciated.
 

hardcorebluesct

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Feb 23, 2014
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You think changing PSU will improve Crossfire performance? Cause I think 2 r9 270x's should do better than 88 FPS in furmak alone without running prime95 at the same time. What PSU and how many watts I should get?

 
Nvidia and AMD have both programmed drivers to recognize the Furmark executable, and throttle accordingly, regardless of temperature or power usage. This can usually be disabled, but it will throttle it by default. So it will lag in furmark
 

hardcorebluesct

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So you suggesting that my psu and crossfire is ok?
 
AMD and Nvidia have implemented throttling to keep power draw and temperatures down under extreme loads (like furmark) so I would test my gpu with Heaven Benchmark 4.0, 3DMark,Valley Benchmark 1.0 and playing Games is always the best way.
 

hardcorebluesct

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Well.....:sarcastic: I tried stress it all the way......to make sure mu OC is stable.......but why would I get 2 different readings......one after another? Psu pushing more juice? That's what got me thinking...........

 
You computer is fine furmark is not a good way to test anymore and you should just do real world test or Heaven Benchmark 4.0, 3DMark,Valley Benchmark 1.0 and playing Games and you'll never have any problems it's just furmark is flawed
 
Solution

Vic 40

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Don't know about those two readings.
If you oc the card use a program to just stress the card and the card alone (the benchmarks of ezskills also put load on the cpu,but not like prime95),if you oc the cpu just stress the cpu and not the card.So test them seperately.


There shouldn't be a need for that.
 
The best way is to play games there is no game on the planet that will only use your gpu and no cpu at all so the don't kill your computer looking for a magic way that only uses your gpu with no cpu at all.Just make sure your system is stable and enjoy