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Unigine Heaven Benchmark 4.0 Low Framerate when Prime95 is Running at the Same Time?

post #1 of 4
Thread Starter 
I tried yesterday to see how much power consumption my rig is consuming at CPU+GPU load, and I noticed that when Heaven 4.0 is running really choppy like 15-55fps. I closed Heaven after seeing that and closed Prime95, and ran the benchmark again and everything went back to normal.

Any idea why did that happen? I ran all my previous PCs with different specs using both Prime95 and Heaven 4.0 running and everything is fine, so this is the first time it happened to me. I also noticed that the temperature sensor is borked, like 50000C is what I am seeing. The first time I ran Heaven, it does not detect the temps at all, just blank.

Maybe I need to reinstall Heaven or something?

Here are my specs by the way:
i5 4670k (stock for now)
z87m OC Formula
Sapphire R9 290 Tri-X (stock for now)
Toshiba Q
WD Black
Seasonic X



Thanks!
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post #2 of 4
It's absolutely normal to see poor fps when running Prime95 and Heaven together, especially when you are running a powerful GPU and a not so powerful CPU at stock speeds. The CPU becomes the bottleneck when usage is high (in this instance), thus causing the GPU to stall (in terms of GPU usage), which reduces the fps overall.

Overclocking the CPU would help increase the fps slightly. Also, running both tests together is not a good indication of max power draw, because the CPU will do more work compared to the GPU since there is a bottleneck caused by the 100% usage on the CPU, thus reducing the GPU's workload, which equals reduced GPU power draw. Best way to indicate real usage is to play a highly demanding game and take an average from your wattage readings.

As for the temp sensor, what software are you using? Sounds like a software issue. I get this sometimes, when using MSI Afterburner.
Edited by BradleyW - 4/14/14 at 5:59am
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post #3 of 4
i would not recommend leaving the cpu at stock with that gpu. just no.
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post #4 of 4
Thread Starter 
The thing is, I paired the tri-x with my "ancient" i5 2500 non-K and a Gigabyte B75N before going to work, and I don't get that same "bottleneck" I am experiencing with the 4670k frown.gif

I do not want to start OCing because I want to know what is the root of the problem first.

EDIT: I just check the temp in Heaven while benchmarking, in other software, Afterburner or Trixx (im using this now) and the temps are OK. Havent reinstalled Heaven yet and will try later after work.

EDIT2: grammar and typos, still sleepy lol
Edited by Dyaems - 4/14/14 at 4:13pm
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Windows 7 Ultimate Dell U3014 HHKB Pro JP Seasonic X760 
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