Overclocking 6850K with XMP Profile pushed Blck to 125MHz?

Hardware Overclocking
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Hi all,

I’d recommend that you first see my latest post here with regards to progress I made last night, where I upgraded my UEFI and got the XMP profile working on my Corsair Dominator Plat DDR4 3000MT/s RAM.

Couple specs -

  • Intel 6850K
  • Asus Sabertooth TUF X99
  • Corsair Dominator Plats, 2x 16GB Kits CMD32GX4M4C3000C15

My custom UEFI settings:

  • CPU VCore set to 1.25vdc
  • DDR RAM voltage set to 1.35vdc (each chan)

What I noticed though, was that enabling XMP would push the Blck to 125Mhz * 32 CPU ratio (=4Ghz clock).

However, if I force Bclk to 100 Mhz x 40, the XMP profile no longer works, and I boot into 2133MHz RAM. Checkout the FSB:RAM setting of 1:18 in CPUZ at least when I was able to get the XMP to work (with Bclk at 125MHz), I wonder if this is a factor?

I’ve read that pushing the CPU Strap higher than 100MHz isn’t recommended - thoughts?

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I would just brutally hit ram timing things one by one to max till its booting 3000

and when it works, just toggle again off/on XMP which resets those settings and try if that last one is the culprit

Then its pretty easy to bump that specific setting till it boots

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Basically attempt the XMP, with XMP off, but with Bclk at 100MHz right? So in this case, 15-17-17-35 with XMP off but DDR speed set to 3000MT/s.