Quote from: pbfarmer on January 05, 2020, 10:12:24 PM

Quote from: tvukoman on January 05, 2020, 12:12:09 PM

One Vega 56 referent (64 bios, samsung mem) have hardware errors:
[48C, fan 71%] ethash: 48.36Mh/s, avg 48.54Mh/s, pool 47.27Mh/s a:9112 r:0 hw:164

Any recomendations?

txs

Not all memory is the same - some can take more aggressive timings, some less. I would trim back your timings changes to a minimum set (and reduce REF), and build from there:

Code:

--REF 15600 --RFC 248 --RAS 30 --RP 12 --RC 44 --RCDRD 14

This will prob get you to 99.5%+ of your list anyway. If these still don't work - try reducing REF more (try 11700), then maybe RC, then RP - those are your biggest movers.

Also, are you sure you need 850mv for those settings? All of my vegas (including the flashed 56) are running 930cclk/1028mclk @ 800mv for 47.4MH/s.

EDIT: Take a look at your temperatures (esp mem) on the two different cards as well. Higher mem temps cause faster charge decay requiring more frequent refreshes (i.e. lower REF). Mine do just fine w/ REF=15600, but mem temps are all in the high 50's to low 60's.

txs pbfarmer! With your memtweak timings just finished test 24 hour with 0 hw errors ;-)

HBM temperature is low 70's on all cards (can't do much on that, small room with no window for cooling, just one fan, and few holes for fresh air)

Never tried so low mV (800), i don't have power play table for 800, is it possible to running 800 mV with ppt build for 850 mV?

tvukoman

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