System Memory Bandwidth Performance

System Memory Bandwidth Performance

Let's chart up some results so we can compare them:

So here is a mixture of dual and quad channel results varying with processors and platforms. We tested the memory as highlighted in the charts. Now, with the regular memory at 2133 MHz we see good performance hovering at the 32K marker, there is nothing wrong with that at all. It's just that you can get so much more bandwidth at a higher frequency. And yes, with a 3600 MHz kit, you are reaching almost 50K GB/s (dual-channel).

Memory Write Test

We obviously did the same with the memory write tests. The write performance jumps to 50K at 3600 MHz in dual-channel. Just enable XMP in the BIOS and you are good to go. With complicated workloads and database applications, here's where that extra bandwidth would kick in. The reality for normal PC usage and gaming, these differences do not mean a lot. 

I've also thrown in some memory latency figures as with AMD Ryzen and Threadripper these have become more significant. Latency results are highly dependant on the processor's memory controllers. However faster memory and tighter timings will have an effect on that as well.