6000 CL30 -> 6000 CL26 hynix a-die 2x16gb SR TeamGroup T-Create Expert, Ryzen 7 9800x3d, Gigabyte B650i Aorus Ultra
I've been working on overclocking my ram for the first time over the last couple of months. I've learned a lot about the timings, but information I find on the internet can be lacking or conflicting, and I would like to hear from other people who have dealt with DDR5 overclocking on AM5.
The main timings I'm wondering about is tRRDS/tRRDL/tFAW, tWTRS/tWTRL, SCLs, and tRDWR/tWRRD, but information, suggestions, or experience with any of it is encouraged.
Q1.
Is tRRDS/tRRDL/tFAW better at 4/8/20? 5/10/20 because of the tRRDS x 4 = tFAW rule? 5/8/20? No benefit past 8/8/32?
Q2.
I lowered tWTRL (w/ tWTRS 4) until it didn't boot at 10 and was okay at 12, then I found tWTRS could go to 2 after that. Does that make sense or is lower not necessarily better or worth it for stability? Because I see most people do 16/4 and leave it.
Q3.
Does lowering the SCLs too much hurt performance as I've heard some people say? Or is tWRWRSCL 1 fine and just something that works and tRDRDSCL 4 pretty much minimized?
Q4.
Same idea for tRDWR/WRRD and other things: is lower not necessarily better or worth it for stability or is the balance an issue?
Some info that might be helpful mentioned:
– I found 6200 cl26 is not stable no matter what I do
– 6200 is the highest my 9800x3d is stable at in 1:1 with cl down to 28, but I'm pursuing 6000 cl26 because I think that would better
– I use an ITX case so I have tREFI at 50000 just so I don't run into heat instability with that
– tRFC 360 didn't boot but tRFC 370 has not given me any problems
– vSOC may go a little bit lower but since I don't have high FCLK I didn't bother fully minimizing it, at least until I'm done with everything
– FCLK 2167 gave me errors, 2133 has been fine
– GDM off gave me quick errors
– Nitro 1/2/0 errored late so I'm currently trying nitro 1/2/1
– I raised tRTP to 16 to see if tRP could do 30 then minimized tRTP to 10 (tRTP 8 didn't boot with tRP 30)
– I didn't try minimizing tRP more because I doubt under 30 works with CL26 as I've heard it usually bottoms out at CL+4 and is extremely low
– tRC 32 errored quickly and 34 has been fine
– I set tRAS to 126 per AHOC/Buildzoid's recommendation since it doesn't seem to have much of any effect on performance but too low can be weirdly unstable, if I understood correctly