I know the Karhu run is a bit short for these but this already has ran over 6 hours of Y-Cruncher VT3 with just some slightly looser subtimings as shown in my original 8000 post for this board.
Kit is just a 2×16 Teamgroup Delta RGB 7200 34-42 kit, great heatsink on these as running 1.64 VDD and 1.5 VDDQ and being able to keep them at or below 40c with just a fan is really impressive, glad I dont need custom watercooling for these.
Interestingly the 125ns tRFC I was originally using was found to be unstable sometimes past 37.5c but raising it a bit has alleviated that issue.
Latency is pretty respectable here as well with the UCLK and MCLK being in sync at 2000, it benefits the same way Zen 3 and Zen 2 did when running these 1:1, but now at 8000 I get some additional bandwidth benefits, Im also as of typing this 4th place on Geekbench 6 multicore for 7800X3D CPUs on my looser subtimings, I will run GB again after some more Karhu probably. https://hwbot.org/submission/5552231
Really happy with how this turned out overall, I initially didnt think it would be doable on a 4 DIMM board but I did it and its reaped the benefits of sky high 1% lows in DX12 games, yall should try for 8000 yourselves.
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what’s your ambient? my gskil flare x5 are shit, they stay at 35c while idleing. on good day stays around 50C with no errors.