Question ddr5 6000mhz ram running at 1800 mhz

junglist724

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You don't actually have 6000MHz RAM. It's 6000MT/s(megatransfers/s)

DDR(double data rate) does two transfers per clock so 3000MHz gives you 6000MT/s.

You're running your ram at 3600MT/s so XMP is probably off. Turn XMP on and pray it's stable. Without XMP on your motherboard will follow Intel's guidelines. Intel only guarantees 4800MT/s with 2 DIMMS in motherboards with 2 slots, 4400MT/s with 2 DIMMs in 4 slot motherboards, 4000MT/s with 4 single rank DIMMs, and 3600MT/s with 4 dual rank DIMMs which is what you appear to have.

12700Ks have a slightly easier time with memory than 12900Ks due to the lower E core count but 4 sticks at 6000C36 is asking a lot of the memory controller so I wouldn't be surprised if it's totally unstable with XMP on. Just two of those gskill 6000C36 sticks is borderline too difficult for either of my 12900Ks to handle. The Samsung DDR5 chips used in those kits are pretty terrible.
 

junglist724

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i have enabled the xmp profile. even tried changing frequencies
It's probably too unstable, gives up after too many failed memory training attempts and just resets back to defaults. Try turning XMP on and lowering the speed manually to something below 6000. Though to be honest that may not work either. I've gone through two of those GSkill 6000C36 kits and one of them wasn't even stable with xmp off and speed manually lowered to 3600. The one I'm using now required literally an entire weekend of nonstop tweaking till I found SOC and VDD2 voltages that were stable in testmem5.

DDR5 at 6000MT/s or higher is a nightmare to deal with unless you win the IMC lottery and Samsung DDR5 ICs should just be avoided at all costs.
 

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