I'm in the process of down-clocking my RAM to run in 1:1 mode. This is a binned 1.4 V CL32 6400 Hynix M-die 2*48GB set.
My Memory Clock is unable to stably run at 3200MHz at 1.2V SoC.
I also have a weird feeling that 6000MHz 28-36-36-30 may be faster than 6200MHz 30-37-32-40.
Anything I can do better?
5 Comments
Anything lower than tRFC of 160ns won’t post. Running under 50000 tREFI since RAM temperature in my mini-ITX case pegs at 62C at 1.4V and 52C at 1.3V.
2 things that you could do would be either “Core Tuning Config For Gaming” > Legacy and a higher Infinity Fabric (2200 for example if your chip runs it).
Turn off gear down mode, try lowering tcl to 28, bump up to 2200 FCLK. If you can do those, it should be good. If you can’t disable GDM, you can try for 6400c32/30 2133 FCLK instead maybe.
And yes 160ns is pretty much a hard limit on these chips. 512 is not very stable for me so I usually do 532 or 544 with 65528/65535 trefi.
There is also a setting called Core Tuning for Gaming or something, not sure if it is called that on Gigabyte but there is a “legacy” setting which lowers latency but worsens game performance. For example I see 5-6ns lower latency in AIDA64 but in some other game benchmarks I see 2-3% lower scores compared to the “level 2” setting.
On that kit, I’d go for higher frequency and try to get 6400 stable. Your TRFC will max out around 500, and if you’re temp limited, increasing trefi is also a no go so your options are limited.
6400 1:1 @ stock voltages will not be stable and will need to be tuned. SOC @ 1.20 / VDDP 1.150 is a good start, and begin increasing SOC .01-.02 at a time until stable. Once you find stability, start lowering VDDP until it’s no longer stable. On my systems, I usually find stability around 1.27 – 1.275 SOC for 6400 1:1.
If you want to improve your 6200 profile, start dropping CL by cranking more voltage into VDD. You can start with +50mv and go from there for cl28.
Well, you are running the benchmark through a hypervisor, so that is going to affect the scores.
And as others have mentioned, “Legacy” Core Perf. Tuning and higher FCLK will get it down.