What voltage have you got the DRAM at and did you need to also bump the Vcore up a little as well at those RAM speeds? I found I had to bump the Vcore Offset to + 0.045V which pushes it close to 1.3V and the DRAM at 1.4V. Increasing the DRAM volts didn't seem to help further. Just interested to see your take on it as our systems both seem quite similar?
The main voltages after VDIMM that make a difference is VCC SA and VCC IO = 1.15v seems to be a sweet spot for both, I keep my ram at 1.37-1.38v since my system is quiet and the airflow around the sticks is basically hot exhaust air - they get pretty toasty as is.
so after a few days of testing here is somethings I learned:
1. Mesh OC makes a big difference in game stutter/frame pacing for me. Small difference in latency benches: i run 32x with a 1.010v ring voltage to keep it stable.
2. Higher clocks on ram give kind of false results on AIDA (the CAS X 2000 / RAM HZ formula still applies) - validated through Superpi.
i.e.
CAS 14 @ 3000Mhz = 14 * 2000/3000 = 9.33
CAS 14 @ 3200= 8.75
CAS 15 @ 3600 =
8.33 <- sweet spot, Benches will be higher here
CAS 17 @ 4000 = 8.5 <- AIDA will tell you this is the fastest, Benches will be lower
I tested everything from 3200 cas 14 to 4200 cas 19 and the setup you're currently running is probably the best latency/bandwith mix that our chip likes (tested using Timespy CPU bench - that correlates closely to overall performance). Maybe the 7900x likes more bandwith but anything past about 102GB/s doesnt really do much for cinebench or any other benches I ran.
I think if you want to tweak further just start bumping the Mesh and the
bclk - it's free % gains - I bet you will be stable at 101-101.5 and its free perf.
Here is my current CB with that setup: CAS 16 @ 3636
