Core i-9 9xxx CPU's do really hate dual rank 16GB modules above 3800 tho so it might just be the CPU IMC being at it's end here. I had a 9900K P0 with a MSI Z390 Ace and a 9900KS with a Hero as well and neither of them would properly run above 3800 with DR 16GB so..OK, could use some advice here. Trying to figure out how to get these sticks to post @ 4000 .. I think I may have just hit a wall as they aren't the best b-die bin, they are dual-rank, and apparently the Z390 DARK doesn't like dual-rank as well ..
G.Skill 32GB 3200CL15 ; F4-3200C15D-32GVK (2x16gb sticks) on a 9900K(5.0core/4.7cache) / EVGA Z390 Dark:
I've got 3600 15-15-15-28 / 2T rock solid @ 1.45v + 1.18v VCCIO/SA. I'm now trying to push 4000. I'm currently testing 3800 @ same timings with just a voltage bump to 1.5v, and it's going right now on Anta777 extreme. My issue though, is that I can't get the sticks to post at 4000 no matter what. I've tried loosening timings up to 18-18-18-36, pushing more voltage (up to 1.52v), and increasing VCCIO/VCCSA (even though I don't think that's the issue) and I get hung on post-code 4C every time. I'm running manual w/ XMP off, letting board Auto the RTL/IO timings.
Any tips? This will be for my 24/7 use so I don't want to push too much voltage if the vDIMM voltage is the issue. As far as I understand, 1.55v is still OK, probably max?