Should I add the lines
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

Before the rest of the commands in the .bat? Does this makes any different in this miner?

Thx!

Better yet I'd love for someone to explain what these variables are actually doing.  Also, I noticed they are used in various scripts on Linux, do these variables offer the same functions there?

Quote from: beatfried on February 16, 2014, 02:08:08 pm

yeah... ubuntu 12.04 LTS
2x r9 290 @ 1125/1400
1x r9 290 @ stock

~12000 cpm

oh, and my cards are always slower with -a 1 than with -a 0. don't know why ...

-a 0 is indeed fastest for R9 290 in Linux.

Think there will be a fix for the Windows side of things?  At the moment I have my mining rig on linux only because how much better your miner performs on the OS with 290x's.  The lack of overclocking utilities and support for the Hawaii cards on linux is pretty underwhelming though.

Does anyone know how to change GPU voltages on nix for Hawaii cards or even how to monitor current voltages?  At the moment all I can control are clocks/mem/powertune/fan.