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Old 05-04-20, 01:55 PM
Nine Iron Nine Iron is offline
Join Date: Dec 2012
Location: St Helens, Merseyside
Posts: 164
Ryzen DRAM calculator - tRFC has multiple values

I'm putting this lockdown to some use and trying to tighten my RAM timings, and it's becoming obvious through my reading around that tRFC has a measurable effect on overall performance.

I've used Ryzen DRAM calculator to get me started and it gives a single value for tRFC, but my board has it split into tRFC1, 2 and 4. The calculator reports my current tRFC as 630; my 1, 2 and 4 values add up to close to 630, but not quite.

What's the best way to set tRFC to, say, 576? Reduce each individual value proportionally and see what happens? I've read about BIOS clears having to be done because of too-low tRFC, and while I've got profiles saved, I don't really want to wipe everything out if I don't have to!


Ryzen 5 3600
Asus B450-F Strix Gaming
16GB Corsair DDR4-3600
Gainward 1070
ADATA SX8200 512GB, Intel 660P 2TB
Corsair RM650x

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