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TweakTown's Ultimate Intel Skylake Overclocking Guide

By: Steven Bassiri | Guides | Posted: Dec 21, 2015 3:11 pm

Corsair DDR4 4000MHz Cas 19 4GBx2 Kit


In this guide, I used two very nice high-speed DDR4 kits. The first is the Corsair Vengeance LPX 4000MHz C19 kit.





Corsair's kit is based on the latest Samsung die which is used by many overclockers. Through a very strenuous binning process Corsair has identified kits capable of running at 4000MHz (4GHz) and is now selling them through their own site. This kit costs $279.99, which might be a bit pricey, but you are guaranteed 4GHz if your motherboard supports the kit and your CPU can run it (most can).




This Corsair kit can do a maximum validation of 4231MHz (4.231GHz) which is awesome. Corsair also provides a cooling fan for active cooling, so if you can fit it on top I would, but the kit does not get very hot at 1.35v. Stability at high speeds is also more likely with a high bin kit such as this one from Corsair.


I do know that many users are pushing over 1.7v+ on their Samsung based kits. Running a higher voltage does not necessarily provide a clock speed that scales, but rather allows for the timings to be tightened, which increases performance.



Memory Frequency Scaling




Here I set constant timings and scaled up memory frequency to see the impacts. Memory bandwidth is more greatly impacted by memory speed at higher frequencies, but below 3600MHz, it seems that memory latency performance is increased more greatly by increasing memory speed. I would try to aim for a 3600MHz+ memory kit for Skylake, which is compatible with your board (XMP compatible). Then I would try to see how much higher I could go with memory speed and tweak the latencies while maintaining a memory voltage at or under 1.35v for 24/7 operation. If you are benching, a higher-end kit like either of the ones here will provide you with a lot of fun as DDR4 overclocking is very complex and there is a lot to achieve with higher-end kits.

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