Recently I came up with a strange thing when my rx480 8g cards were mining on different hashrates, I'm using 29Mhs rom since September and till this time everything was fine, but now couple 480s are mining at strange hasrates from 7-12 from 20-24. I tried almost every solution I could find on internet. The last thing was changing the bios back to original and 90% of cards are mining now at 24Mhs without any issues, but when I get back to 29Mhs bios they start jumping around again. I'm out of options what more to try, any suggestions ?
Check risers?
Try down clocking a little more. for example instead of using 1150/2150 try 1125/2115
I did this for a few of my cards and it did the trick infact some are @ 1100/2000 but still hashing at 29Mh/s all with the same bios
Hi guys, I think I have similar problem. I had one rx 480 8gb (Powercolor) running perfectly stable 30mh/s at 1150/2150 modded bios, I aded one more card rx 480 8gb (Asus) over riser, worked fine at 28-29mh/s without changing bios, after I modded bios everything messed up. I returned org bios, reinstalled drivers and MSI AB, sorted everything and it started working again at 28-29, and after a while it just droped to 24.5mh/s and it wont change no matter what I do (overclock to 1200/2250, 1175/2200, 1100/2100... and even down to 950/1900 it remains 24.5).
I have Chieftec 650w psu and only those 2 cards are running on it... I tried changing riser, pcie, molex and other cables...nothing. Its confusing to me because it ran perfectly for couple hours before i modded bios, and again for 3-4 hours after i reinstalled everything and drops to 24.5 and doesnt move no matter what... The first card is still perfectly stable at 30mh/s.
Please help.
Forgot to say that I ran all this in Claymore 7.4 mining eth. When I tried dual mining eth+pasc in claymore 8 (worked fine with one card) sometimes 2nd card doesnt work at all, sometimes at about 22mh/s eth no matter how i over or under clock it.
