SSDs will have higher latency than ram, and I seriously wonder if they actually can hit 7GB/sec, or only theoretical. Ram is faster, always, in latency and band

SSDs will have higher latency than ram, and I seriously wonder if they actually can hit 7GB/sec, or only theoretical. Ram is faster, always, in latency and bandwidth. > I've benchmarked some not-so-old servers (the entire box, not a VM!) as capable of only 35 GB/s streaming reads from main memory! Then you have either a low-end server or something is very wrong (I think you benchmarked wrong, see below). You should be getting maybe 15 GB/sec per channel, so 4 channel = 60GB/sec, for a decent server you may well have 6 or 8 channels. (figures may be a bit off but 35 is puzzling me). You may have measured on a single core, but each core has its own mem reading stuff so it should multiply up if your benchmark uses extra cores. Anyway, I have to get back to work on my dual-core haswell. Good luck! (Edit: 15 * 4 = 60, not 80, corrected)