Extended overclock sessions versus temperatures
Extended overclock sessions versus temperatures
Since we have high-end cooling in the house we definitely should have decent tweakability on the processor.
As such, we were wondering where we'd end up with a quick overclock session. So we popped in a Core i5 750 processor for a good reason, we had a peek at a selection of stages in overclocking and it's respective temperatures, have a look at the following results please.
Overclock results - temperatures in degrees Celsius
We'll remain focused on this solution with one fan, that's what most of you guys will use. It's a bit hard to read in the chart, but these are the four tested stages:
- Core i5 750 @ default | fan regulated by motherboard (dynamic PWM)
- Core i5 750 @ 3.3 GHz with 1.3 volts on the CPU | fan fixed at 80%
- Core i5 750 @ 3.8 GHz with 1.4 volts on the CPU | fan fixed at 80%
- Core i5 750 @ 4.2 GHz with 1.5 volts on the CPU | fan fixed at 80%
So when we take this Core i5 processor from default towards 3800 MHz / 1.4v @ CPU we see that the temperatures are not an issue just yet. With all the processor's physical cores stressed we max out at roughly 64 degrees C. That is just okay.
Mind you that we measure at a controlled room temperature of 21 degrees C, in hot countries the ambient temperature will obviously have a (negative) effect on overall cooling performance.
We also took the processor to 4200 MHz and fired off 1.5v on the CPU, when 100% stressed the CPU would reach roughly 77 degrees. That is too hot really, but still a manageable operating temperature and it remains stable.
The 1.5 volts we used is high for a 4200 MHz CPU clock on a Core i5 750 processor. Typically 1.4v would be fine as well. We use a slightly higher voltage to show you the cooler can cope with the additional heat coming from the CPU.
What we can conclude here is that the thermal dissipation, or even better, the stated cooling capacity under high stress is quite decent with the LMX cooler.
