Need some advice evaluating memory performance

1Wolf

Limp Gawd
Joined
Jul 10, 2007
Messages
366
Daisy Chain motherboard (ASUS Dark Hero)
AMD 5000 series CPU (AMD 5900X)

2x32 DDR4 3600 18-22-22-42
vs.
2x16 DDR4 3600 16-16-16-36

Outside of overclocking and speaking only purely on "out-of-the-box, set to XMP and go!" PC performance in FPS game benchmarks, how much of a performance difference is there if you move from 2x16 up to 2x32?

I'm just trying to learn to better understand how those timings translate to real-world speed. I really wanted to put 64Gigs in this machine but I don't want to pay a big performance penalty. I watched a video from hardware unboxed on YouTube about memory speeds and they seemed to indicate only a small difference in FPS due to timings on 5000 series Ryzen. So if the difference is something like just 3-4 FPS in most games to go with the 64 Gigs with worse timing then its worth it to me. If the difference is going to be large and I'm going to see 10-20 FPS difference then I need forego my plans for 64 gigs and stick with 32 Gigs because I don't want to take the gaming performance hit.

I really want to go with 64 Gigs and don't mind paying a small or tiny performance penalty in FPS when gaming. But if its a medium or large performance penalty in FPS in gaming then its not worth it to me.

Just as some quick background. I use my machine for 4K gaming and VR flight sims which is really really really FPS hungry. You need every ounce of horsepower you can get. On the other hand, I use my machine for alot of other things too. Video editing, rendering, 3D stuff, virtual machines, software development, on and on. Its MAIN use is gaming though. The last time I built a machine the common advice was "You don't need more than 16 Gigs for gaming and most tasks so you'll unlikely ever need 32 and thats nuts!". I built the machine with 16 and then when I upgraded to 32 just 3 months later alot of various stuff I use that machine for got WAY better. My only regret was not going with 32 to begin with but then, the popular opinion was "You'll never need more than 16". I'm just trying not to make the same mistake I made the last time I built a machine. However, once again, if the "price" is a significant FPS performance penalty then I'd much rather roll the dice on 32 Gigs getting me by.
 

dasa

Limp Gawd
Joined
Feb 19, 2012
Messages
501
Outside of overclocking and speaking only purely on "out-of-the-box, set to XMP and go!" PC performance in FPS game benchmarks, how much of a performance difference is there if you move from 2x16 up to 2x32?
64GB will be a few FPS slower due to the loser timings ~0-5% unless you fine tune and OC that's all it will be as the faster kit really needs tweaking and overclocking to shine at which point the performance gain could be around 15% in some programs.

You could also run 4x16G 3600 16-16-16 Samsung b die as the memory controller is plenty good enough for 3733 4x16GB but can take some tweaking especially with that MB which I believe is overly expensive for the small benefits it provides and is only really good for people that love to speed weeks tweaking there system.

A middle ground could be Micron chips if you don't want to spend as much time tweaking the RAM.

Crucial Ballistix 64GB Kit (2x 32GB) 3600 16-18-18-38 BL2K32G36C16U4B​

 
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