It might be wise to consider a cooler for your Intel i5 6600K processor.
It might be wise to consider a cooler for your Intel i5 6600K processor.
Is it beneficial to purchase a cooler for this Intel i5 6600K processor?
I’m currently using a stock cooler with an overclocked BCLK up to 105 MHz, and it’s working well at 4095 MHz (default 39x multiplier). My concern is that the VCORE voltage fluctuates around 1.28–1.30V, but with OCCT it rises to about 1.36–1.38V. Some forum users report achieving higher frequencies at these voltages, though I’m using auto-voltage instead of a fixed setting.
Does this suggest my chip is underperforming and won’t improve with a better cooler? Or could the auto-voltage setting raise the VCORE too much?
It depends on your setup. Your motherboard and CPU affect performance. Some CPUs handle overclocking better than others. You might struggle to reach a 4400MHz daily boost with the stock cooler, but it could be possible. The NH-U12s seems like a reliable cooler option.
The crashes you're seeing may be better discussed elsewhere. I haven't encountered any unexpected crashes outside of known issues.
When using an OC, always keep things off auto. Setting values manually is preferable since leaving them on auto usually increases voltages significantly. Using better coolers, like close loop liquid coolers, can be very helpful. High-performance HSF coolers often match or exceed the effectiveness of AIO closed-loop coolers, depending on your needs. Choose what suits you best. If you decide on an HSF cooler, I highly recommend it.
I believe the usual method for protecting those chips is to boost the mult and keep the bclk unchanged. Not that I'm a specialist. I installed my first chip at 4500MHz without adjusting voltages, which caused a core failure, and the replacement part only worked reliably at 4400MHz. The initial chip ran under a 280AIO Corsair loop, while the second one I have now uses an EK-based loop with a 280AIO but includes the GPU in it.
I prefer keeping the voltage at auto, which gives me 0.83V while idle, 1.30V while gaming, and 1.38V during a stress test. It stays well below the safe limit of 1.40V. Keeping it at auto might help extend the CPU's lifespan... I don’t need to maintain a steady ~1.35V.
The Noctua NH-U12s could also work for HSF, wouldn’t they? Smaller but I still need access to RAMs because the PC sometimes crashes and I have to reattach RAMs and reset the BIOS when booting.
I changed BLCK back to the default 100 and am currently running at 4200MHz on a stock cooler (though it’s in a cooled case). Temperatures never reached 70°C during the stress test. Maybe I can increase the frequency to 4400MHz and install an aftermarket cooler—just have to keep an eye on the voltage.
It depends on your setup. Your motherboard and CPU affect performance. Some CPUs handle overclocking better than others. You might struggle to reach a 4400MHz daily boost with the stock cooler, but it could be possible. The NH-U12s seems like a reliable cooler option.
The crashes you're facing might be better discussed elsewhere. I haven't encountered any unexpected crashes unrelated to known issues.
I think those crashes might be linked to DRAM being overclocked from 2667 to 2800 MHz. I usually encountered them while switching tabs on games or other BSODs. The same issue appeared when I attempted to push the overclocks further.
I’m currently keeping my OC at 4300MHz. After about 10 minutes of OCCT, the stock cooler was operating at full capacity and started showing instability around 70°C, with spikes reaching up to 82°C on one core while other cores stayed cooler by about 5°C but still experienced those spikes.
This situation occurred when the case cooler was set to low. If I switched it to high, the temperatures dropped by roughly 5°C and the stock cooler stabilized its speed slightly.