I have several rx480s using Boysie's ROMs, getting 30 MH/s on ETH, using Claymore ETH/DCR 7.4. I installed Claymore 7.0 for ZEC, getting roughly 160 H/s on the same rx480s. I decide to switch back to ETH, but now I only get 15 MH/s. Yes, a 50% drop! If I install the stock ellesmere ROM, I get 24 Mh/s, and can boost that to 27 Mh/s with tweaks as usual. However, it seems the ZEC Claymore application 'BREAKS' the hashrate of the Claymore ETH application, if using a modified ROM. More importantly, this is permanent. Well, semi-permanent. I found if I COMPLETELY REINSTALL my OS and switch video cards between workers - essentially completely start from scratch, I can get them back to 30 MH/s. However, if I run Claymore 7.0 on ZEC just ONCE, they drop back down to 50%. Anyone have any idea what is getting switched? I thought it might be registry settings, so I restored the registry. No good. The only thing I can find that fixes it is a complete reinstall of the OS, in addition to erasing motherboard BIOS.
Hmm, sounds familiar to my situation, however if I go back to ETH I get full power.
No custom rom however
Just 1/6 cards working at half strength on v7 ZEC. The other 5 are fine, and all 6 on 2x clones work fine too.
