Overclocking non-K Skylake processors may soon be possible

Dec

12

2015

Skylake processors that do not have an unlocked multiplier, can be overclocked soon anyway thanks firmware updates for Skylake motherboards. They are then able to adjust the base clock of the processors without providing direct instability.

The news appears from the clocked professional overclocker Dhenzjhen reached with a Core i3-6320. He knew the processor to carry on to a final speed of 4955MHz by using liquid nitrogen. That represents a 27 percent increase compared to the standard rate of 3,9GHz. The results were achieved on Supermicro C7H170-M motherboard with a specially modified firmware. The over clock was achieved by increasing the BCLK from 100 to 127.

AnandTech has contact had with several motherboard manufacturers and states that Asrock, Asus and Supermicro are all working on firmware updates for their motherboards to enable overclocking non-K-Skylakes. Asrock example would possibly come next week with all firmware updates. The author, however, does make the comment that at present it is not entirely clear what the motherboard manufacturers do to the base clock overclocking permit and also whether a modification to the hardware-side is needed.

From tests of Tech Spot also shows that the processors at higher base clock speeds not excessively consume much more energy; they tested a i3-6100 which at a clock of about 27% showed an increase in consumption of 25%. This is partly explained by the fact that the integrated GPU must be disabled before a base clock overclocking is possible.

As of Skylake while it is theoretically possible to use the base clock to overclock the CPU clock speed because it is no longer connected to eg the PCI-Express bus as with previous generations of Intel processors. As a result, an adjustment of the base clock leads less quickly to instability in these areas. Nevertheless, it was up to now not possible to increase the base clock by more than 4 á 5MHz to get without running into instability.

Normally only the Skylake processors with the ‘K’ suffix able to be overclocked. Namely, that it have an unlocked multiplier which is applicable to the base clock, which is around 100MHz. By increasing the multiplier, the effective clock rate of a K-Skylake-processor can thus be increased in increments of approximately 100MHz. However, the K variants of Skylake processors are more expensive than the non-K models and the cheaper Skylake i3 and Pentium series contain no K variants altogether. Due to this development, it is therefore possible to get more performance for less money.

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