szzy2727 Posted September 30, 2015 Share Posted September 30, 2015 Hello, My Spec: Windows 10 i7 4790K (Evo 212 Heatsink) GTX 970 OC 16GB Ram 500 GB SSD PSU: EVGA 850 G2 I goal is to have a stable Gaming PC, make sure all parts are functional. How should I run the stress test to achieve this goal and how should I read the test result? I ran a single test with FPU stress test for 5 minutes, my CPU went up the 95c. My idle temp is at 29c. When I ran the test, my case is open, my room temp is 25c. Is this indicate something wrong with my CPU? Best Regards, Quote Link to comment Share on other sites More sharing options...
Fiery Posted October 1, 2015 Share Posted October 1, 2015 No, there's nothing wrong with your CPU. Haswell and Devil's Canyon processors tend to work at extremely high temperatures and it's normal that they start throttling under very demanding stress. The FPU subtest of AIDA64 System Stability Test (SST) is designed to put the processor under the heaviest load, and so drive its working temperature to the maximum. You should however let it run for several hours. 5 minutes is great to see if there's an immediate issue, e.g. you get a BSoD or such. As for the other subtests of the AIDA64 SST, you should simply enable them all, and let it run for several hours. Drawing a conclusion of the stress tests is easy: if any error message pops up, your computer restarts, locks up, powers off suddenly, or a BSoD is shown, then your computer is not stable. If the test keeps working without any negative feedback for several hours, then it's a pass. Just make sure to run it in both modes: first with only the FPU subtest enabled, that is the thermal stress test. And the second time with all subtests enabled, that is the general stress test using a more diverse workload. Regards, Fiery 1 Quote Link to comment Share on other sites More sharing options...
szzy2727 Posted October 1, 2015 Author Share Posted October 1, 2015 Thank you for your respond Fiery, great support here. The FPU subtest really stress out the CPU. I used Prime95 before. Aida64 is much more polished with tons awsome features. So, I ran the single FPU subtest for 4 hours without any negative feedback. My max temp has reached 100c degrees, all cpus are constant at 85c to 95c during the 4 hours test. Is 4 hours long enough? Is 100c degrees the highest reading the software will record( meaning the cpu temp might even went above 100c)? After this test result, do you suggest that I need a better cooling system? Best regards, Quote Link to comment Share on other sites More sharing options...
Fiery Posted October 1, 2015 Share Posted October 1, 2015 Thank you for your respond Fiery, great support here. The FPU subtest really stress out the CPU. I used Prime95 before. Aida64 is much more polished with tons awsome features. So, I ran the single FPU subtest for 4 hours without any negative feedback. My max temp has reached 100c degrees, all cpus are constant at 85c to 95c during the 4 hours test. Is 4 hours long enough? Yes, it should be enough to state your system stable under heavy load. Is 100c degrees the highest reading the software will record( meaning the cpu temp might even went above 100c)? AIDA64 can measure up to 127 Celsius on most systems, but CPUs cannot work at such high temperatures. Your CPU most likely works at up to 100 Celsius, and then it starts throttling to prevent permanent damage. After this test result, do you suggest that I need a better cooling system? Well, that's not an easy question to be honest Surely, with water cooling you could put those temperatures down by 5, 10 or even more Celsius, depending on the performance of the cooling system. But, with regular air cooling, your system will not perform a lot better even with a bigger fan. You could get it down by 5 Celsius, but IMHO it doesn't worth the effort and costs. Especially since what the AIDA64 SST FPU subtest does is the absolute worst scenario. Even gaming all day long (or encoding videos for that matter) will not cause such high temperatures for your CPU, since the CPU load will not be that high all the time while playing a game. So as long as your computer works stable at those temperatures, it is fine and a proper build in my book Quote Link to comment Share on other sites More sharing options...
szzy2727 Posted October 1, 2015 Author Share Posted October 1, 2015 Really appreciate your replies! Awesome forum!!! Awesome software!!! Quote Link to comment Share on other sites More sharing options...
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