m50b25 Probably not enough ram. If you've got another 4 GB lying around, try adding it to this system and see whether hashrate goes up.. you should have 360+ KHash/sec at those clocks. I've got 355K from 7970 @ 1000/1250, so your 1080/1500 should give more.
I could just borrow 4 gb from one of my other rigs just to try that. Thanks
Hello everybody
I have 4 Powercolor 280x turboduo.
I cant get the cards over 291 kh/s each. Something very strange about my cards i that i have to set gpu thread 1 instead of the usual gpu thread 2 i use when mining other scrypt coins.
I have GA-F2A85X-UP4, Amd A4-5300 and 4 gb ram.
Any ideas what i should try? I have tried to play around with the gpu core speed. I still dont get over 291 kh/s
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Using -g 2 with -I 13 should always be possible on a 280x, I think. Your engine clock is possibly way too high for it. Did you try changing the thread concurrency + or - 1 (8191 or 8193)? One other thing that has occasionally been useful for me is to try different Catalyst versions.
You didn't say what kind of error or failure you were getting when attempting -g 2.
edit: oh yeah, try worksize 128 too.
I know. I should be able to use -g 2. Yes i already tried using thred concurrency 8191 and 8193. I usually use 8193 when mining other scrypt coins. I will try lowering the core speed but i seriously doubt it will do anything because i already tried lowering to 1030 mhz.
With that config i have and using -g 2 i get 745 kh/s when mining ltc. And the cards are stable for weeks.
I will post later today what kind of error i get in vertminer when using -g 2