Quote from: Supercomputing on August 08, 2017, 08:10:47 PM

Quote from: Claymore on August 08, 2017, 07:39:08 PM

At startup the miner shows a notice that you must wait about a minute to get correct hashrate, but he ignored it, so he got some random number. I get 440H/s at stock clocks.

Could I please have your launch configuration + OS + driver version?

After 11.5 minutes:
ZEC: 08/08/17-15:04:13 - SHARE FOUND - (GPU 0)
ZEC: Share accepted (140 ms)!
ZEC: 08/08/17-15:04:23 - New job from eu1-zcash.flypool.org:3333
ZEC - Total Speed: 260.951 H/s, Total Shares: 25, Rejected: 1, Time: 00:11
ZEC: GPU0 260.951 H/s
ZEC: 08/08/17-15:04:29 - New job from eu1-zcash.flypool.org:3333
ZEC - Total Speed: 261.559 H/s, Total Shares: 25, Rejected: 1, Time: 00:11
ZEC: GPU0 261.559 H/s
ZEC: 08/08/17-15:04:48 - SHARE FOUND - (GPU 0)
ZEC: Share accepted (156 ms)!

Windows 10, beta (closed) drivers. Probably it throttles, add "-tt 50" option to "config.txt".
UPDATE: my bad, I really see 310H/s in Windows 7 + public drivers. So it is either drivers, or Windows version, I will check it right now.
UPDATE2: it is drivers. If I use public drivers, I can get only 310-320H/s. For beta drivers, I get 440-450H/s. AMD should release new version of drivers asap, current public drivers are bad.