Overclocking the i7-5820k
Overclocking the i7-5820k
I constructed a computer a few months back using an i7-5820k chip. I boosted it to 4.5 GHz at 1.3v, but stability under heavy use was inconsistent. I reduced it to 4.2 GHz and it performs much better, though the maximum temperature with my liquid cooler stays at 60°C. I’m wondering if adding more voltage is safe, since the cooler can handle a lot. Also, my DDR4 3000 RAM struggles above 2133 MHz, even though I sometimes use 2666. What’s the best stable overclock setting? Thanks for your guidance!
1.3v typically delivers 4.5ghz in about 90% of cases.
Before increasing voltage further, verify your RAM stability using memtest86.
Check your cache clock or ring ratio—aim for x35 or x40, avoid higher settings.
Setting it to auto or above 40 may lead to instability.
For extra power beyond 1.3v, you can reach up to 1.4v, but temperatures should stay under 80°C.
I’m confident you can achieve 1.3 at 4.5ghz with some adjustments.
1.3v typically delivers 4.5ghz in about 90% of cases.
Before increasing voltage further, verify your RAM stability using memtest86.
Check your cache clock or ring ratio—aim for x35 or x40, avoid higher settings.
Setting it to auto or above 40 may lead to instability.
For extra power beyond 1.3v, you can reach up to 1.4v, but temperatures should stay under 80°C.
I’m confident you can achieve 1.3 at 4.5ghz with some adjustments.
I will also state clearly that I would never personally exceed 1.35v (I have never gone beyond 1.32). If you can achieve 4.5 at those levels, I believe it isn't worth it and you should settle for the lower setting. It remains extremely fast.
I need to verify my cache clock to determine its current value. I plan to maintain a lower clock setting, but so far no problems have arisen.
There isn't a significant real-world benefit to using a cache or ring clock faster than 4ghz (or around 3.5ghz, which is a bit of a stretch). Some individuals prefer keeping it synchronized with the core clock in a 1:1 ratio, but this isn't essential and demands precise adjustments along with higher voltage. They do all of this without any actual performance gain.