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Quote from: Pickle-Rick on January 20, 2018, 08:24:05 AM

So it seems aftermarket cards use Hynix memory and do not seem to overclock so well? Few I have seen struggle to maintain 950.

Were all reference cards Samsung memory?

Mine are Samsung (Vega 56) One card can't go stable beyond 900. Some of them start failing around 930. One I tested worked at 980 but I don't know which one now and it takes forever to try one by one. So currently my rig has 1 card at 900 and 5 cards at 925. Maybe Samsung mem is overrated?

Yeah maybe. I thought it was common to get them to run 1100mhz.

As far as I know, if you have a V56 with Samsung, it should be able run around 1100Mhz, but you have to flash a V64 BIOS on it.
For my V56 with Samsung it works.

That is something I've been reluctant to try so far, maybe I'll try, but they are running so well that I've been dragging my feet. After all the 1900 hashrate they give me deserves some respect

I felt adventurous and did the flash. Testing it now.
Memory OC does take 1100 Mhz now (MVDDC is 1.35 V). Getting 1975 (1408/1100) now from 1920 (1408/925) on cryptonight but does 44 in ETH over 37-38 on 56.
Power consumption is similar to my vega 56 (I didn't optimize it for 56).

Good to know. I guess I'll try if I ever get them out of cryptonight, since there is no significant gain there.