Should I move from 4 to 2 sticks with Ryzen 3900x?

TT158

TT158

TT158

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Joined
15 May 2020
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387
Hi All,

I recently ended purchasing a 3900x and MSI X570 Unify after the Intel Z490 setup I was going to get didn't arrive.

I bought 4x8gb Patriot 4400mhz ram sticks (b-die), and have been running them at either 3800 or 3733 MHz using the Ryzen DRAM calculator recommended timings (except I can never seem to get 1T to work, must use gear down mode). I think it's 3800 15-15-16-32 or something from memory. The 3733 timings are similar.

I have read that the Ryzen memory controller doesn't handle 4 sticks so well, but also that 4 ranks perform better than 2 (https://www.tomshardware.com/amp/reviews/amd-ryzen-3000-best-memory-timings,6310-2.html)

I've been having the odd stability issue and am wondering if going down to 16gb might give better timings with more reliability? Would performance suffer at all? All I'm really looking for are consistent frame rates in games.

Thanks in advance!
 
Minstadave said:
Ryzen 2 only really struggles with 4 dual rank modules, yours are single rank and they're at a good speed.

Upgrading to 16GB modules will make little to no difference.

Theres this spreadsheet of Ryzen latency results which show 2x8GB is probably the easiest to tune but 2x16GB is up there and 4x8Gb is doable too:

https://docs.google.com/spreadsheets/d/1dsu9K1Nt_7apHBdiy0MWVPcYjf6nOlr9CtkkfN78tSo/edit
Click to expand...

Thank you, mate. That spreadsheet is really useful and somewhat reassuring that I'm on the right track, as the results I'm getting are around the best I can see on there for 4x8gb. Maybe I can just tweak the timings slower for a bit of extra stability, if that is even what is causing the rare crashes. It passed the HCI memtest at 300% or so. Maybe I need to try for longer to make sure it's not that.
 
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