Quote from: 4ward on April 27, 2018, 08:33:47 AM

Quote from: FlowLive on April 27, 2018, 06:13:32 AM

Joblo I got a question. (or anyone that could)

I just changed my ram from 3200 (Only able to run 2666Mhz, it is dual rank ram) 16-18-18 to 3200 14-14-14 Samsung B-Die to be able to run full speed of 3200 on Ryzen...

I mine YescryptR32 or R16. On R32 I get speeds of 585H/s with the 2666 CL16 vs 450H/s with the 3200 CL14...
I read it could be that this algo has memory requirements... but can't get any more info than this...

Do you know?

If I understand correctly, you went from dual channel memory to single.
Math would say that the throughput is now (3200 / 2666 / 2) ~= 60% of the original, so the more memory dependent the algo, the more speed you loose

You can also take a look at the CPU load/temps/power consumption, if it is lower that it was before, this means that you dont have enough memory bandwidth to feed cpu with enough work

Yescrypt algo is bandwidth hard, since it performs memory lookups

If interested, see more in the whitepaper https://password-hashing.net/submissions/specs/yescrypt-v2.pdf

No it's still dual channel, running @ 1.35V like it should, I'll take a look at this paper thanks!