- Jul 24, 2015
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- 4,510
So I have an interesting problem. I have an i7 4790k CPU on a Maximus VII Hero mobo with a Hyper 212 Evo cooler. The cooler has the fan that came with it on the back as a puller and a Noctua NF-F12 fan on the front as a pusher. Normally, according to both Intel's Extreme Tuning Utility as well as SpeedFan, the CPU idles in the high 30s-low 40s. When I run the XTU stress test, it stabilizes in the mid to high 70s. The memory test gets it a little higher than the CPU test, but not excessively so. When I run the Small FFTs test with Prime95, the temperature instantly shoots up to 100 degrees and the CPU starts thermal throttling, according to XTU about 50%. Of course, I stop the test instantly.
I have the CPU overclocked to 4.6 GHz but the cache is still at 4.0 GHz and the core voltage is only 1.17V. At stock settings, the XTU stress test produces temps in the low to mid 70s.
Now, I did just purchase this new mobo and installed the CPU/heat sink myself, so it is possible I installed it incorrectly, but I tinted the CPU first, spread a thin layer of paste on the heat sink using the heat pipe/credit card method, and used the vertical line method as suggested by the Arctic Silver website for Intel 4th Gen CPUs. And yes, the fans are plugged in and working.
I'm thinking perhaps because the break-in period isn't even close to over, the temps might be higher, but that wouldn't explain the radical difference between the XTU stress test and Prime95, would it?
The part that really confuses me is why idle temps and XTU test temps are more or less normal, but Prime95 cooks it instantly.
I have the CPU overclocked to 4.6 GHz but the cache is still at 4.0 GHz and the core voltage is only 1.17V. At stock settings, the XTU stress test produces temps in the low to mid 70s.
Now, I did just purchase this new mobo and installed the CPU/heat sink myself, so it is possible I installed it incorrectly, but I tinted the CPU first, spread a thin layer of paste on the heat sink using the heat pipe/credit card method, and used the vertical line method as suggested by the Arctic Silver website for Intel 4th Gen CPUs. And yes, the fans are plugged in and working.
I'm thinking perhaps because the break-in period isn't even close to over, the temps might be higher, but that wouldn't explain the radical difference between the XTU stress test and Prime95, would it?
The part that really confuses me is why idle temps and XTU test temps are more or less normal, but Prime95 cooks it instantly.
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