XMP Z790 issue?

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Kyle939

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Hello all,

so I raised a ticket about this and so far, all I’ve got is to take a photo of the cpu socket which is perfectly fine!

Anyway. So I had 2 ram slots in running DDR5 6000mhz at 32Gb and it was fine. I then bought another identical set and it is identical off the exact same ram to fill my slots so now I have 4 ram DDR5 6000mhz - enable XMP and the PC crashes after random stuff.

I ran a memory test and it failed so I RMA it got a new one, test again same thing. How bizarre right?

So the same tests and same memory test issue. This time I manually add some stuff and when I to the advanced and noticed DIMM1 doesn’t set a frequency and when I manually add them (not sure if correct) then no memory test issues or pc crashes yay, but now every game crashes and doesn’t work properly.

So now just so I can use my pc and play, I’ve turned it all off on default and running the ram at DDR5 4000mhz which obviously is not what I paid for.

The board is the Z790 Tomahawk. Cpu is the 13900k.

I have been trying for ages and I am really unsure because support is taking forever to do something. I did see a BIOS update so I tried that and same thing.
I do not think it’s a problem with the board, it is around the software on the bios in how it sets.

I am not that advanced to manually add every single timing, but maybe this is the best way? If I know how without anything breaking.

I want to get this fixed if possible.

Thank you for taking the time to read this message
 
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With DDR5, whatever total RAM size you need, you want to reach it with two modules if you also want decent speed.
It's due to the way the RAM slots are connected in a daisy-chain manner, and how therefore DDR5 really dislikes when you use four modules (much more so than on DDR4).

There's a reason why four-module DDR5 kits are basically non-existant (only a handful being sold by Corsair, but none by any other brand), and why the few kits sold are all below DDR5-6000. So, in essence, you can't simply combine two high-speed two-module kits. It just has a low likelihood of working, doesn't matter if on AMD or on Intel.
Also read my post here, and see RAM explained: Why two modules are better than four / single- vs. dual-rank / stability testing

You could probably get something like DDR5-5600 stable there, if you want to keep running four modules. For that you'd enable XMP, but then manually set DRAM Frequency to DDR5-5600 and run some stability tests (waiting on a crash is not a good stability test).
 
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No need to set timings, just enable XMP, but before pressing F10 to save & reboot, also set "DRAM Frequency" to DDR5-5600 (under OC in advanced view, press F7 for advanced view). Then it should apply the tighter XMP timings, but at DDR5-5600 instead of -6000. Or if that doesn't work, leave XMP disabled and only set DDR5-5600.
If nothing works, try DDR5-5200 instead.

Here you see a pic someone made, it's not about this, but three settings below the arrow you see DRAM Frequency, you can select one manually there.

MSI_SnapShot_05.jpg
 
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Thank you for the info.
I manually set my times etc etc and it was fine for a while to be fair but still some games crashing but no memory test errors.
I down clocked to 5600 with the rest auto and same crashing but 5200 seems to working fine.

With my ticket open with MSI, I’ve had the weirdest replies with barely any help and this is my first experience using their products and probably my last. Not had a good experience with the product or their support.

are you able to confirm if this issue is specific to all Z790 boards with the 13900k or just Msi? Wondering if I changed board will this matter you know.

I know 5200 is not much of a difference to 6000, I guess it’s just me knowing it’s not what I paid for and principle that’s annoying me
 
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This is not an MSI problem, you are not following the memory manufacturer's recommendation. It's plain and simple; YOU CANNOT MIX TWO MEMORY KITS TOGETHER AND EXPECT THEM TO WORK AT RATED SPEED.
They are sold as kits for one reason and there's a reason why I had to pay a fortune for a 64GB memory kit @ 6400 MHZ instead of buying 2 kits of 32GB @ 7200 MHZ

20bdc64603c56fe3fe15c4a9b9ec231a.png


You can blame MSI or Intel but that won't change anything; it's been the case since ever with any MEMORY KIT.
 
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Yes, with DDR5 it's really quite extreme how much it dislikes when you use four modules. Doesn't matter the board, pretty much. On the lower-end boards it will be even worse.

I've updated my RAM thread with some more explanations about the problems four modules can create. It's really not out of the ordinary to have to back down significantly on your DDR5 speed with four modules to make it stable, compared to two.
 
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I’ve just left it at 5200 because that’s the most stable it will be. I’ve stopped trying to fix it!

Msi support was shocking and proper lack lustre. It got to the point they said the dimm slot 1 is a lower voltage etc. no help at all. They even wanted a photo of the board cpu to see if there was any bent pins which was not.
 
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I had the same problem with my new MSI PRO Z790 -P WIFI MB not allowing my ram to run at 6000 as other but i revisited the BIOS and saw there is a function to match up the ram speed and timing. I put in the proper speed 6000 and latency value 36 for my Silicon-Power branded ram and the speed in opening/running apps, trading charts etc is immediately obvious! Faith in MSI restored!! (results using task mgr)
 

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Wow, thanks for this thread!. I've been happily running a MSI PRO Z790 -P WIFI MB with an i7-3700 for almost a year. Stock speed. Been using Crucial CP2K16G56C46U5 kit for 32GB. Saw a good price on a 64GB kit and went ahead and got it. Same PN just 64GB. Installed it and the first boot took what seemed like 5 minutes. Memory speed went from 56
 
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Probably worth a try, but to say anything more concrete, first we'd need to know more about your system. Board model, CPU model, RAM kit model, and if you tried it with the latest BIOS version.
 
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