MSI b660 Tomahawk DDR5 cant work with 4X8gb Kingston Fury Beast RGB @6000 XMP1/2 profiles

hori158a02dd

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Jul 31, 2022
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Hello,
I have 12600k, Galax 3080 10Gb, Win11, MSI b660 Tomahawk and Kingston Fury beast 4x8GB 6000MT/s 6000MHZ rams (KF560C40BBAK2-16 x2 hynix) . I cant use My RAMs at XMP1 @6000mhz or XMP2 profiles @5600MHZ Just works stabil on XMP3 at 4800 Mhz. Pubg or other games crashing also I cant pass memtest. All setting at auto.
Can you help me pls?
My motherboard is MS-7D41 and A60 bios.
WhatsApp Image 2022-08-01 at 01.32.12.jpeg
 

darkhawk

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Most likely it's because it just isn't stable at this speeds. You might need a bit more voltage either on the CPU's IMC or on the memory to get it stable.
As this is Intel's first forray into DDR5, I wouldn't expect things to just work right out of the box at speeds that high.
Also, consider that you're using 4 sticks of memory, which for MSI's configurations generally doesn't reach high speeds compared to just 2 sticks (due to how the memory signals are routed, etc....).
There might be ways to help get it working, but at this time, I'm not entirely familiar with the process for DDR5 and the newer 12th gen series chips, so I can't be much help there.

Could you perhaps post the settings you're using with the BIOS? That might help as well.
 

citay

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Do yourself a favor and replace the 4x 8GB with 2x 16 GB. With DDR5, 4x 8GB is a terrible choice for several reasons:

With DDR5 RAM, the 8 GB modules only have half the amount of memory banks, which always makes them a bit slower than 16 GB modules.

banks.png

From https://www.kingston.com/en/blog/pc-performance/ddr5-overview

I could go into detail what happens there, but just know that it's cheaper for the RAM manufacturer that way, and it's a bit slower for the end user. You lose 10% RAM performance or more from this.


But more importantly, four modules are quite bad with DDR5 in general. I explain this in detail in my RAM thread under 2).

You will see that there are no four-module RAM kits for DDR5 at all, and that's for a reason. Once you use four modules on any Z690 DDR5 board (also from other brands), the frequency that the memory system can reach suddenly drops down considerably, as you see in my thread. They might be able to improve the situation somewhat with a new BIOS, but i don't think it's possible to do so in a way that would allow anywhere close to DDR5-6000. I would say that with the current generation of DDR5 board designs, with four modules, it's more likely that they will always stay way below. With DDR5 it's always highly advised to use two modules only (and even with DDR4 that is advised, but four modules can at least work decently there).
 

hori158a02dd

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Jul 31, 2022
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You may right, 4 Slot using is impossible @6000. I just find stable settin at XMP2 @5400mhz. Bu 2 slot xmp1 @5800 mhz CL32 is also stable and perfect performance. I gonna use 2 slot ram.
Thanks,
 
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