Intel burn test vs xtu4/29/2023 The right way to ensure your overclock is fully stable The lesson here would be that Intel knows what they’re doing when choosing these automatic settings. Incidentally, this is close to the Vcore that the CPU chooses automatically for a 4.3 GHz clock speed, if you select the so-called “offset mode” instead of forcing a fixed Vcore. In order to make it IBT+Furmark stable for several hours, I would have probably had to increase Vcore to around 1.3 V. (Notice that if the crashes had been due to overheating, the test would have failed more quickly than before, as increasing the CPU Vcore made the CPU hotter.) Instead of failing after 5-30 minutes (as verified in multiple tests), IBT+FurMark failed after 108 minutes. This was a novel hypothesis I hadn’t seen it discussed in any of the overclocking resources that I had read.Ĭonfirmation: In the words of Colonel Hans Landa, that’s a bingo! Upping the Vcore from 1.25 V to 1.275 V improved the stability by a large margin. In other words, the CPU Vcore is set high enough for isolated CPU load, but not high enough for combined CPU+GPU load. Hypothesis #3: Loading the GPU is somehow causing the CPU to lose enough power to become unstable. (3) With an open case and all fans set to maximum, the CPU+GPU test failed just as quickly. (2) During isolated CPU/GPU stress testing, CPU/GPU core temps were the same, yet there were no crashes. Refutation: (1) GPU and CPU core temperatures were carefully monitored during stress testing and did not exceed 90☌. Hypothesis #2: The increased heat production is causing the GPU, CPU, or video card VRMs to overheat. Refutation: After replacing the PSU with the Be Quiet! Straight Power E9 580 W (564 W on the 12 V line), the symptoms were exactly the same. The Corsair HX520W supplies 480 watts on the 12V line an overclocked 3570K + HD7850 shouldn’t draw more than 300 W, but there’s also the motherboard, and the PSU is kind of old – who knows, maybe the capacitors have aged? Hypothesis #1: The PSU can’t supply enough power for the combined CPU+GPU load. I repeated the experiment several times and the time to failure was always between 5 and 30 minutes. However, when I ran IntelBurnTest and FurMark simultaneously, I was shocked to see FurMark fail almost immediately. Most overclockers would agree that these results look rock-solid. Prime95 Small FFT (all cores) for 8.5 hours.The system had successfully completed the following stress tests: I had overclocked an i5 3570K to 4.3 GHz at 1.25 Vcore. That’s why the Vcore you arrived at using Prime95 or IBT may be too low to guarantee CPU stability when the GPU is under stress. In other words, to be stable under combined CPU+GPU loads, your CPU may need a higher Vcore than it does for isolated CPU loads. Interestingly, loading the GPU can make your CPU unstable! That doesn’t guarantee that your system will be stable when both the CPU and the GPU are under load. The problem is that you stress-tested the CPU and GPU separately. ![]() Congratulations! Your system is now considered stable.īut then you run Crysis or Battlefield 3 and you get random lockups and reboots. ![]() You follow all the standard recommendations that you can find on overclocking forums: you run Prime95 for 12-24 hours, do a few hours of FurMark, and a few hours of IntelBurnTest for good measure. I feel like it is a relatively accurate stress test for my uses.Consider the following situation: You’ve overclocked your CPU, set the core voltage (Vcore) to some reasonable number, and then it’s time for some stress testing to make sure your rig is stable. I'm now using realbench as recommended by one of the commenters. Seeing as my CPU fails Prime95 but passes XTU ok, do you think my system is stable enough to never crash during normal gaming (and my general usage patterns)?Įdit: Thanks for all the help guys. Other than that it's just web surfing and streaming/downloading videos (none of which are cpu intensive). The most demanding thing I do on my PC is game for 8-10 hours a day depending on the game. I am looking for a system that will never crash on me based on my day-to-day usage. Now to note: I am not looking for a 100% rock solid totally stable system. I've also stress tested using XTU for 1hour (both cpu and memory) and I had no issues. I've stress tested it with prime95 and it does fail within a minute or so (one of the threads anyway). ![]() I have it very modestly overclocked to 4.8ghz 1.27v. So I've been stress testing my new i7 8700k gpu.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |