XMP profile problem after CPU upgrade

vian_siu · 25 Jan 2024 at 10:30

I recently upgraded from a 5900x to 5950x. It was running fine. However, I noticed the RAM speed was reset to default one day, and when I tried to re-enable the XMP profile, it couldn't post.

I tried updating to the latest bios (5003), but no luck.

My mobo is Asus x570 Strix-F
and my RAM is https://www.overclockers.co.uk/team...c4-28800c16-3600mhz-dual-chann-my-002-8p.html I have two sets and use all four slots

vian_siu · 25 Jan 2024 at 10:40

mickyflinn said:
This happens sometimes running 4 slots, set the timmings manually and adding a bit more voltage usually does the trick.

How much more voltage would you suggest? The XMP profile is 1.35v I think.

vian_siu · 25 Jan 2024 at 11:03

tamzzy said:
memory voltage is not the only variable and probably the least likely cause as i assume you did run the current sticks successfully at 3600c16 with your old 5900x?

i suspect that in your case, it would be the IMC quality as this plays a huge part as well...you may need to increase VSOC/VDDP

if none of the above work at safe voltages, it may well be the case that your 5950x IMC is just too weak to run 4x16 3600c16 sticks
64gb 3600c16 is a very tough ask on any AM4 memory subsystem

Yes the current sticks was fine with the old 5900x. So if the voltage change doesn't, do I need to turn the frequency down a bit? I didn't think the XMP profile could cause issues since I thought they were factory-tested safe overclock.

Would decreasing the frequency require less voltage? If I lessen the timing can it run at its rated speed? I am not sure if timing or frequency is more important for Ryzen CPU.

vian_siu · 25 Jan 2024 at 11:25

I got it to post with the exact timing and voltage of the XMP after changing it to 3200mhz. I think I will try and tweak that. I don't really like up the voltage as I think RAM is easily damaged, at least compared to the rest of the components.

Thanks for the help

vian_siu · 25 Jan 2024 at 11:42

tamzzy said:
ram is actually reasonably resilient to overvolting
ddr4 spec is 1.2v, but for long-term use you can run 1.35v safely, 1.4v usually
(possibly 1.5v with b-die but i've never used b-die so not going comment)

but as i said it's unlikely to be a ram voltage issue. most likely the CPU itself (so VSOC/VDDP/VDDG) - these can also be slightly overvolted if you want to attempt to use your ram at it's rated XMP speeds

I assume if I do that, the CPU temps will go up. I hope my Noctua DH15 can keep it cool.

vian_siu · 25 Jan 2024 at 11:46

tamzzy said:
it'll be fine

Ok I will up the voltage a bit and see if I can get it back at rated speed

vian_siu · 26 Jan 2024 at 07:43

I left VDDP and VDDG on auto and changed VSOC to 1v and I can do 3533mhz. Maybe the IMC on this chip isn't too bad, its just not as good as the old one.

vian_siu · 26 Jan 2024 at 21:54

tamzzy said:
yeah that 5900x that can run 64gb 3600c16 without messing with bios definitely has a golden IMC
might fetch a good price if you can post screenshots and advertise it as such lol

Thats what I am hoping lol. Shouldve taken screenshot before upgrade, people just have to take my word for it now.

vian_siu · 26 Jan 2024 at 22:12

tamzzy said:
@vian_siu just stick vsoc to 1.1v...1.1v is absolutely safe for everyday use. i also use 1.1v for my 5800x3d system
1.2v-1.25v is the absolute safe limit for vsoc, but like you, i avoid running my voltages near/at max
just make sure your infinity fabric is running in synchronous mode or else you do lose performance - if you don't know where to find this you can just use ryzen master (download the program on amd website)

I upped the SOC voltage to 1.1v but I couldn't get it to post at 3600mhz. 3566mhz is the closest I can get. I changed the FCLK to 1766 to set the 1:1 ratio. I guess this is the max my chip can do without doing more voltage changes.