Voltage Settings for Safe Overclocking on i5 9600k
Voltage Settings for Safe Overclocking on i5 9600k
You should avoid exceeding a voltage that keeps your system stable over time. While 1.3V was once considered safe, many users now push to 1.4V or higher without issues. This change likely reflects improved thermal management and component reliability. Make sure temperatures stay below 80-90°C for best results.
Approximately 1.35 or 1.375 volts works well for 5GHz, though it varies with your cooling setup
1.4V works well when temperature stays under 70°C, otherwise it drops to about 1.35V (up to 80°C). Above that, cooling becomes a serious issue.
I'm using 1.35 delivered, 5 GHz with AVX-512 enabled. On an older Prime95 95 system without AVX, I'm around 85 with one core occasionally reaching 90. On the newer Prime95 95 with AVX-512 small FFT, that core nears the maximum, while the rest stay in the 90s. Both run stably over time, and since I don't run any AVX-heavy tasks, this setup seems safe. It looks like the silicon isn't particularly well-suited for high clock speeds without AVX support.
I understand @Jurrunio is right—it’s a bit too hot for long sessions. Are you using something cooler? My 6600k also has a single hot core, and I keep it below 80°C.
I started with a 5-year-old H100i and it struggled at 1.3V and 4.8/4.7 AVX, leading to cooler warnings. I swapped it for an NH-D15 with a Kryonaut module and a 15°C cooler. I increased the voltage to OC higher, and everything is now stable with both fans running smoothly in a meshify c mini. The fan curves are hitting around 75% capacity, giving me about 150W TDP for non-AVX and 170W for AVX. The NH-D15 is rated for around 250W, but I’m not sure what that means in practice. Raising the AVX Offset helps lower temperatures too. I turned off BCLK Adaptive Voltage and it seems to make a difference.