ram speed and rendering

[lukx]

When choosing ram for new build how important is it's speed? With crazy ram prices is it really worth getting the fastest ones?

[Morbid Angel]

Short answer is no. I think there was a thread about this a while back. Ram speed is overshadowed by much slower hdd speed. Since most of data is read from disk anyway the first time around, the subsequent times data is read from ram is marginal in difference between say ddr3 and dd4. With that said I would get modern ram which is best suited for your cpu but does not break your bank.

[Alex_M]

Kind of depends. I know that AMD Ryzen CPUs perform a little bit faster with higher RAM speeds. Not really much in multi-core workloads but better in games and other single core stuff. I think it's not worth going over 2933-3000 Mhz since gains beyond that are minimal if any and certainly not justified taking current RAM prices into account. Do some research on Google if you're building a Ryzen based system. Also, if you are into overclocking, you can just buy a couple of hundred MHZ slower RAM than you intend and just do a mild ~200 Mhz OC to get your money's worth. If you ask me, even a 2400-2800 Mhz kit will be perfectly fine if you are not intending to play games on a 144 Hz monitor. Here's an interesting video of a Threadripper 1950X CPU tested with different speed RAM kits - https://www.youtube.com/watch?v=VDNmCO0INKo

[DPS]

I have three workstations that are about the same spec and the position in the chaos benchmark worked out to be in order of the RAM speed. The difference was about 2-3 seconds between a 2666 and 3000Mhz.

I think it was 44 sec compared with 46 with CPU OCed to 3.7GHz

That at being said - I put some custom cooling in the 2666 system and it now runs 10 degrees cooler even when overclocked an extra 100Mhz and now benches at 43sec. I could prob go a fair bit faster but need to do some more research so I don?t break it.