Question New RAM unstable at the previous rams speed

[SgtWireless]

i upgraded from 16gb of Corsair vengence ram which i had clocked at 3000mhz to a 32gb kit of the RGB version, but its not stable being clocked at 3000mhz, its paired with an intel i7 9700k which is overclocked on a Z390 mothermoard, i have XMP on, but truthfully i dont know what im doing and let the motherboard set the clocks for everything automatically. i dont know if theres something i should be doing for optimal speeds and performance.

 

[thestryker]

It would help if you shared the specifics on both DRAM kits.

Generally speaking 16GB sticks of DDR4 aren't as good as 8GB at tighter timings, so it's entirely possible it is just a timings problem.

 

[SgtWireless]

what information do you want, the first set was corsair vengence 8gb two stick kits, clocked to 3000mhz at most, this is a corsair vengance RGB kit which says on the box it can be set to 3600 but in practise its unstable above base clocks on this mobo, tho i just changed what slots they were plugged into

 

[thestryker]

Running DRAM at 3000 means basically nothing by itself. You need to know all of the timings that it was running at. Your new kit is likely running timings your CPU's memory controller cannot deal with, or potentially the DRAM itself isn't stable with. One way you could try to get the new one running is to set XMP and then manually change it from 3600 to 3000. This would keep the timings from 3600, but run it at a lower frequency.

 

[SgtWireless]

its set to 2666 at the moment with the XMP profile on auto, the pc wont boot at all if the ram is set to 3600, 3400, and it becomes unstable at 3000. i did discover tthat this CPU prefers ram around 2666mhz anyway, but i wouldnt know how to go about tweaking it further.

 

[SgtWireless]

nevermind, i turns out i had the ram in the wrong slots on my mobo, now it can clock higher again