|
Title: Sapphire Nitro Rx470 4GB very low hash rate on EThereum Post by: brizio71 on October 31, 2016, 03:14:23 PM Hello,
I have buid a second RIG using Asrock Q1900M 4GB RAM on Windows 10 64bit and 2 GPU Sapphire Nitro RX470 4GB, the first GPU is directly connected on PCI-e x16 and the second one with a powered riser X1 flat cable. The directly connected PCI-e x16 GPU work at 25 MH/s but the second one run at 4 MH/s does anyome have the same issue ? Can be a rider PCI-e card problem (i have try 2 different riser with flat powered cable? I have try all possible combination on Bios side (gen1 gen2 gen3). Thanks Title: Re: Sapphire Nitro Rx470 4GB very low hash rate on EThereum Post by: Iegion on October 31, 2016, 03:39:35 PM try running it without a monitor and clear out all overclock settings.
Title: Re: Sapphire Nitro Rx470 4GB very low hash rate on EThereum Post by: Dowper on October 31, 2016, 04:01:53 PM Attach the monitor on gpu2.
Title: Re: Sapphire Nitro Rx470 4GB very low hash rate on EThereum Post by: brizio71 on October 31, 2016, 05:57:55 PM Title: Re: Sapphire Nitro Rx470 4GB very low hash rate on EThereum Post by: Raja_MBZ on October 31, 2016, 06:39:56 PM Did you try using the Claymore ethereum miner? Which driver are you using? It could be happening because of undervolting... I'd suggest you to first try re-installing the drivers and do not play any over-clocking with it. If even that doesn't work, try a re-install of Windows 10.
USB risers are usually fine, I don't think so that it is their problem until and unless it's a 3rd class version. Title: Re: Sapphire Nitro Rx470 4GB very low hash rate on EThereum Post by: brizio71 on October 31, 2016, 11:32:44 PM Did you try using the Claymore ethereum miner? Which driver are you using? It could be happening because of undervolting... I'd suggest you to first try re-installing the drivers and do not play any over-clocking with it. If even that doesn't work, try a re-install of Windows 10. USB risers are usually fine, I don't think so that it is their problem until and unless it's a 3rd class version. I use Claymore miner, I have try to update to last driver, I have try also to use simplemining softare directly from USB pen always same result ! I have order another riser pcie the USB version I hope this will solve this problem Title: Re: Sapphire Nitro Rx470 4GB very low hash rate on EThereum Post by: philipma1957 on November 01, 2016, 03:35:23 AM What cable do you use? Those sapphire have hdmi output and display output. My trick is use a hdmi to dvi cable adapter. I plug the hdmi dongle into the sapphire i plug a dvi cable into the dongle and into a dvi monitor this stops the 4mh issue. Sapphire cards seem to always have black screen no video out issues via the hdmi jack. I first had this show mining btc with hd 7950 sapphire cards. Back to rx 470 I have three or four Dvi to hdmi adapter to get past the issues of no video Which I think causes the 4mh bug |