Help with getting RAM stable

[malachi]

Hi All,
I purchased some Corsair VENGEANCE DDR5 RAM 64GB (2x32GB) 6600MHz, CL32 (CMK64GX5M2B6600C32) kit last week. But I cant get this ram stable past the default. If I enable Intel XMP, the system will not boot. If I increase the speed a bit, it will boot but I get the BSOD or when I start a game, it will hard crash.

Specs from CPUZ

From my BIOS, everything is still at default, nothing is overclocked.

I am used to plugging in the RAM, set the speed and I am good to go. This time, its not the case.

Any suggestions what tweaks to make.

Thanks

 

[malachi]

try setting xmp then changing the speed of the memory to 5200 and go up from there until it crashes then go backwards 1 step? try 5200,54, 56, 58, 60, 62, 64 as it clearly doesnt like 6600(you may have to swap to advanced mode in the bios for it)

I have to disable, otherwise the system doesn't boot. Yet this RAM supports XMP....well, it stays on the box

If I go one step above the default, 4800. It gets to the desktop but will crash after I start a game.

I ran memtest, passed with no problems. But once the speed is raised, gives me errors after 15mins of testing.

 

[malachi]

hopefully someone more familar with your cpu will come along and give you guidance but to me it sounds like you've been unlucky with the memory controller. can you verify memory voltages and soc voltages when you gone higher than stock memory settings? it may be a voltage issue, also could be worth checking for bios updates on the board

Yeah, that's the part I'm not sure about memory voltages and soc voltages. As I haven't messed with those before, not sure if to raise or lower.

My board is on the latest BIOS, had to do it after the Intel CPU fiasco and replacing my CPU.

 

[malachi]

you can use something like hwinfo64 to monitor these voltages or even check memory voltages in the bios - just check that its set to the same as what your xmp voltage is if not thats your issue, ive had a board in the past when using xmp settings completely ignore the xmp voltage and use the stock voltage which results in unbootable system.

Thanks! I didnt know about hwinfo64.

Very helpful, I give that a try

 

[malachi]

Tried last night.

Got it stable at 5800 with XMP enabled. Above that memtest will show errors. Which is fine by me, better than the 4800 default speed

Now, I will work on my AM5 setup over the weekend. But I have 4 sticks of RAM for that at 6000 not sure if that will be a problem like it can be for Intel setups.

 

[malachi]

Intel are pretty solid with high speed memory but even so it should be running at 6000mhz and if it's failing memtest then I would consider sending it back.

Did yourun memtest on each individual stick and also set speed with one stick installedeach time ?

No I didnt, not at the 5800 speed.

I have another set coming also Corsair but speed is 6400. I might try that.

 

[malachi]

More testing needed before sending it back imo, see how the 6400mhz performs.

As for your AM5 something to note is that on first boot it can take up to 15mins for anything to show on screen and may reboot a few times this is because the motherboard is training the memory so be patient.

Just start with 2 sticks at first then add the other.

Yeah, had that when I first built it. Found about the AM5 needs to "train" the RAM before a proper boot.

I see how the 6400mhz RAM goes.

 

[malachi]

Memory is most likely fine.

Dual rank + 4 dimm Z690 board is making it difficult. QVL for your board only maxes out at 5600 for 2x32GB.

Worth trying XMP then manually set SA 1.3V , MC & TX 1.4V, VDD & VDDQ 1.5V as a quick and dirty test to see if it works.

OK.

I have also grabbed some G.Skill Trident Z5 6400 MHz RAM. After reading reports Corsair RAM may not play well with my board at high frequencies.