Expect 900k each card at the most for 290x.
Iam using 1= R 9 290 x 1= R 290 and the R 9 290 trix -oc
my 290x is 985 khz and the r 9 290 (915 khz)
my trix (840 khz) is an problem because i can't use higer gpu-engine than 940, the card fails everytimes. I have the card allready 4 weeks and not working good. If you have an idea tell me please?
my setting is
-g 1,1,1 -I 20,20,20 -w 512,512,512 --gpu-fan 88 --temp-target 78 --gpu-powertune 30 --temp-overheat 90 --gpu-dyninterval 3 --expiry 1 -s 1 --no-submit-stale --lookup-gap 2 --gpu-engine 1031,1033,940 --gpu-memclock 1500,1500,1500 --shaders 2816,2560,2560 --thread-concurrency 32772,32772,32768
This way my efficiency is the best.