[bayindirh]

> Are you talking Zen1 or Zen2...

Unfortunately, neither. The last AMDs I was able to play with Opteron 6xxx series. The later ones weren't as fast, and Zen 1 was not easy to obtain, so we were unable to acquire them.

The last ones I used were better from their competitors of the era. I also had a desktop system from that era which was way better, at least for my workloads.

I'd love to play with Zen 1/2 and compare "benchmarks" to "real workloads", because as I said before, in HPC, benchmarks are just numbers.

e.g. Your memory bandwidth may be low, but if it's low latency & you're hammering the bus, bandwidth may not be limiting. OTOH if you're streaming something continuously, your latency becomes moot, because the bus has already queued up everything you need and can continue piling up stuff you need until you process the ones at hand. For the second scenario, I have listened to a talk about an embedded system, which the developers were able to accelerate the system 10x by using an in-cpu accelerator unit to copy required memory segments to cache independently from the CPU.