these guys with rx 570/580 hashing below 1kh/s i think are doing it wrong. check your straps and oc.
all of my rx 570 hashes above atleast 1kh be it 4gb or 8gb. the only problem i have is micron, which i think is the worst in cn variants.
Agree, matches what we found as well. Haven't really found any card stuck below 1kh/s, except for Micron mem where we've been stuck around 860 h/s on some cards whatever we try for straps and clocks. Samsung by far the easiest, Hynix often also just a copy of lower-to-higher straps. And, I'm really not that good with straps, I should add.
Great job TeamRed!
Read every post here, testing rig for about 8 hours without crash. Now trying to fine tune.
Here is mixed rig (1 x rx570 4GB Elpida, 2 x Vega 56 referent + 1 Vega 64 Asus Strix)
Vega 56 hashing about 2000 H/s, Vega 64 2240 H/s). Vega 56 have low clock and memory 1408/1088 because on SRB is overheating and crashing on more clocks. Vega 64 is on 1520/1100.
Funny thing about RX570 is that hashrate of RX570 somehow depends of configuration on Vega cards.
When i first start miner (without --cn_config) RX570 Nitro + (Elpida) hash 920 H/s with timings 1200/1980.
Than I experiment and put on RX570 7+7 (default was 8+7) and lower clock and memory to 1225/1940 (as user Dragonmike recommended). Playing with OverdriveNtool when hashing, been able to get 942 H/s with 1200/1920 but i think that time i put Vega 56 to 15+15.
When i restarted rig, RX 570 hash just 880 H/s? Try appy OverdriveNtool with same clocks as before 1200/1920 but still 880 H/s. Than i apply 1250/1980 and still 880 H/s. mV for clock and memory 900 mV.
What am i missing and is it possible and where to delete kernel files to make automatic initialization of the cards again?
That sounds a little weird. I dont know if you restarted the miner or rebooted the rig in between runs? One issue we have (which Im a little ashamed of tbh) is our unclean shutdown. It has led to me losing perf between restarts at times. Can you reproduce your test, i.e. whenever you run the 570 only after a clean reboot you hit ~940 h/s, but 570+Vegas after a clean reboot and its lower for the 570?