Temperature is low during idle but rises significantly under load.
Temperature is low during idle but rises significantly under load.
Recently I assembled my PC, just yesterday, and I’m still trying to figure things out...
I’m using an UpHere design CPU cooler, an i5-7600k with factory clock, and DDR4 RAM at 2400MHz (16GB).
My temperatures for each core are 23, 25, 27, and 26 degrees—quite low idle temps. The room is cool enough so they look reasonable. However, when I enabled the Game Boost option on my motherboard (z270M mortar), it jumped to 4.3GHz, while the factory clock was 3.8GHz. Running Prime95 caused it to spike to 90 very fast.
Normally, without OC, Prime95 only reaches 72-73°C, which is a big difference compared to the 4.3GHz result. I was aiming for at least 4.8GHz with OC, but if I can’t hit 4.3 without damaging the chip at full load, it’s not ideal. I’m aware I need a better cooler, but is this expected?
In short, is there something obvious going on here?
The pre-installed auto overclocking tool in the BIOS often applies excessive voltage beyond what's needed. Check the voltage at the stock level after installing it. Increased voltage generates more heat. Note: Also, which version of Prime95 are you running?
The built-in auto overclocking tool in the BIOS often applies more voltage than needed.
Check the voltage at stock during OC.
Increased voltage is the primary cause of extra heat.
Edit: Also, which Prime95 version are you running?
26.6 build 3.
And indeed, voltage is the main factor for heat. So I was considering boosting the clock as much as possible at stock voltage until it fails, then just keep watching the temperatures.
Manual OC'ing is always the optimal approach, and it looks like you already have a clear plan in mind. Another option is to record the voltages that the auto OC establishes at 4.3ghz, then manually adjust these values and gradually reduce them until you identify the lowest necessary voltage.
Manual OC'ing is always the top choice, and it looks like you already have a clear plan.
Another option is to record the voltages the auto OC sets at 4.3ghz, then manually adjust them down until you reach the lowest voltage required.
I checked the auto volts, but the duration was quite high—about 1.4 to 1.5 volts for Auto mode, while the factory setting is only around 1.1.
ShadyHamster:
The 1.4-1.5v setting is quite high for around 5ghz. Even with mine, I can achieve 5GHz using just a 1.35, the 7600k doesn't require such high voltage to operate. Some folks might struggle due to silicon issues and need much more voltage to reach even 4.8Ghz.