Overclocking The Core i7 5960X on X99

Overclocking - The Core i7-5960X on X99

We need to take a couple of steps if we want to overclock. Invest in good hardware by the way, the cheaper motherboards often are not well tuned for enthusiast overclocking. Also get yourself a good power supply and proper processor cooling. Overclocking with Haswell-E was a little more difficult then we expected. Your voltage should sit at roughly 1.3 to 1.4 Volts with an AIO water-cooling, dual rad preferred. Mind you that overclocking 8-cores is a tough job, and our processor sample certainly is not a very good overclocker. The 5960X has a base clock of 3.0 GHz. At 1.3 Volts we end up at roughly 4.0~4.2 GHz. We need a hefty 1.375 ~ 1.425 Volts range to reach 4.4 / 4.5 GHz with our processor. Yes, we have received a pretty bad CPU in terms of overclocking.

Manual Overclocking

The true Guru3D audience overclocks from the BIOS and try to find the maximum stable limit. The generic overclock procedure for multiplier based overclocking is as follows:

• Leave base clock (bus) for what it is right now (if you enable memory XMP at 2400 MHz or higher, chances are your base clock will jump to 125 MHz).
• If optional in the BIOS, increase your TDP limits of the processor to 250 Watts (by that you are allowing a higher power draw), mostly motherboards have this pre-configured pretty okay these days though.
• Set the per core Turbo multiplier at a maximum of your liking:
• example 2: 100MHz x 44 = 4400 MHz
• Example 2: 125MHz x 37 = 4625 MHz (of you have XMP enabled - you will be defaulted to a 125 MHz bus)
• Increase CPU voltage, though setting AUTO might work fine, we applied 1.3V on the processor to reach 4100 MHz and needed 1.4 Volts to reach ~ 4.5 GHz
• Make sure your processor is properly cooled (we used the Corsair H105 LCS cooler)
• Save and Exit BIOS / EFI
  
  

Here is an example at MHz -temps remain fairly OK for an 8-core proecessor and merely a Corsair H105 LCS cooler. 

Above a quick look with a Prime95 stress test with all four cores active and stressed at almost ~4300 MHz. You'll need a rather reasonable cooler, eight-cores versus overclocking require a higher-voltage, and that creates more heat to deal with. Opposed to what CPU-Z is showing, in the end we had to increase processor voltage to 1.375 Volts to get 4.3 GHz on the processor stable.