Cooler Master Masterliquid ML240R RGB review -
Core i7 4790K OC at 4600 MHz 1.3 Volts
Now we up the ante. Understand that 1.30V and higher voltages are the levels where Haswell processors get into serious problems due to the aforementioned heat-spreader versus TIM design applied solution from Intel. We now set the Core i7 4790K @ 4600 MHz and apply 1.30 volts on the CPU while loading it with 100% stress for wPrime to run on all available CPU threads three times. Below, you can see the IDLE results with the Core i7 clocked at 4790K @ 4600 GHz with 1.30 volts on the CPU. Again, the results are the IDLE temperatures thus you are on your desktop doing pretty much nothing.
The temps normally rise above and beyond 90 Degrees C for a lot of heatpipe based coolers, which is a definitive no-go. As you can see, we have dangerous temperatures for most coolers. LCS class coolers perform far better here and cooler actually hold ground very decently.
To advance on overclocking to see where our thermal threshold (the point of no return) is we tweak in four stages where we up the core voltage from 1.30v upwards to a more (rather unrealistic) 1.40v. Normally we can hardly reach 1.40v with a heatpipe cooler with this processor, however, the cooler did allow me to reach 1.40 Volts stable (which is hefty for this CPU). However, at 1.40 Volts DBa acoustic levels spun out of control to an unacceptable level. Up-to 1.30V you are good to go though.
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