DDR5

These are my final figures (for now).

6200C28, FLCK of 2066.


After a single memory error, I decided that I didn't trust the tRAS/tRC not following the rules of tRAS=tRCD+tRTP & tRC=tRAS+tRP. Also since after running back to back AIDA64 tests and there being no difference, I figured it was worth setting it 'correctly'.

In doing so I also decided if I was going to go through the memtest process again, I might as well drop my tCL to 28 for some more gains.

On top of this, after a bit of reading there is some dispute over whether FCLK is completely detached from UCLK, or as other have claimed, whether it is best at UCLK/1.5. After running some AIDA64 tests, I found that my latency was lowest at the UCLK/1.5 speed of 2066Mhz. There was a negligible drop in read bandwidth (a few hundred MB/s consistently) but I think it's worth. This might be more of a concern on those with a single CCD, but not for me.

 

Good info! DDR5 RAM clocking is a complex and time consuming beast.

 

that mobo rocks . is that a 4 dimm ?

 

No mate a 2 dimm.

https://www.asrock.com/mb/AMD/B650M-HDVM.2/index.asp

 

nice little board not so expansive too. I am using an x670e strix itx but looks like it likes more adie over mdie

 

got some new ram delivered today, saying goodbye to the placeholder/starter 64gb DDR5 pack(s) the crucial 4800mhz CL40 sticks, say hello to my new fancy and theme compatible T.create 6400mhz CL34 sticks by teamgroup.

so far: Ive set XMP to profile 1 and saved & exit, boom she boots into windows without a hitch.... now to test stability and tweak and see what i can get out of them

 

is there an easy way to tell who makes the chips on memory? I know the kit I have is Hynix but how do I tell if it's a die or m die?

F5-6000J3038F16GX2-TZ5NR

 

There should be a string above the barcode on the sticks

Last 3 characters tell you the manufacturer and revision

20A = Hynix A
20M = Hynix M

 

Found this using Google..
https://www.reddit.com/r/overclocking/comments/15ej3ue/help_identify_ddr5_hynix_die/

 

Anyone tested this ram on an AM5 system?

 

Was hoping for some RAM deals as part of prime days....
Doesn't look like it's happening

 

I got a good deal on a 64GB kit in the FS section.

 

I think i would have avoided that for my AM5 system.. also prefer no RGB

gah
Edit: got it

Cancelled as it's not on qvl list...
Website says expo, but all reviews only mention xmp....

 

Yeah ideally I don't want RGB either but was a decent price for a 6200 64GB kit. It does 6400 easily enough for my 7800X3D.

 

With 7000 series (and I assume 9000 series also) XMP works perfectly. No need for an EXPO specific kit.

 

For that specific ram you mean?
Cos xmp doesn't work well for the RAM i currently have...

 

I haven't seen a kit of XMP RAM that doesn't work on Ryzen 7000. I have myself tried 5 diferent kits. I set XMP profile and they are perfectly stable.

 

Ok... going to give that ram a go...
But if it's no good I blame you...

I'm wondering though... obviously I'll just be running it at 6000, and i would assume CL would be able to be set list at a lower speed...
But according to the XMP profiles, the shower speeds have higher CL settings?
Thoughts?
7000 CL32-48-48-96 @ 1.45V
6800 CL34-44-44-84 @ 1.4V
6600 CL34-40-40-84 @ 1.4V

 

You should definitely be able to tighten them up.

 

Cancelled that order and got this instead for $147