Hey everyone,
I’ve been tweaking my RAM setup (2x16GB G.Skill F4-3600C16D-16GTZNC – Hynix DJR) over the past couple of days and have managed to hit 3866 MT/s @ 1.55V (haven’t tried lowering it yet). It passes TM5 (1usmus config), a 1-hour OCCT run, and I even gamed on it (Last of Us II) for 4+ hours with zero crashes. Still pending long stress tests for full stability.
Main issue:
My write speed is really low compared to read and copy:
Read: ~55 GB/s
Copy: ~54 GB/s
Write: ~30 GB/s
I expected better write performance at these settings. Any idea what's causing this? What can I tweak to fix it?
Trying to stabilize with GearDown Mode OFF, but it's tricky. Runs fine with GDM ON.
Are there specific subtimings I should adjust to get GDM OFF stable?
Previous setup:
I had a 5600X (Hydra rated it Platinum) and ran 4000MHz CL16 @ 1:1 with 2000 FCLK, 1.050V IO, 1.125V SoC, 1.525V DRAM — fully stable on a similar Hynix DJR kit (2x8GB SR).
Current CPU: 5800X (not great IMC):
Flat-out refuses to boot at 1900 FCLK, no matter the voltage (bug maybe?)
1933 FCLK is stable at stock volts (but I’m running 1.125V SoC just in case)
I can boot up to 2066 FCLK with 1.15V SoC, but anything over 1933 throws WHEA errors
Even 1966 FCLK gives WHEA, despite trying 1.22V SoC + 1.125V IO
Only actual crash happens at 2066 MHz, rest just throw WHEA warnings
My questions:
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Why is my write speed so low? How do I improve it?
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Which subtimings should I adjust to help stabilize with GDM OFF?
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Any tricks to eliminate WHEA errors above 1933 FCLK and push to 2000?
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Is it worth trying lower DRAM voltage (currently 1.55V)?
Any help, suggestions, or experiences would be seriously appreciated. I’ve been deep in subtimings all week — literally dreaming in tRFC and tRAS values at this point!
Thanks in advance!