With Sapphire R9 290x BF ed, I'm using the below to get stable 436 KH with zero hardware error. Any other setting and tons of HW errors start coming in. I think the thread concurrency did it for me. Has to be 2816*8 for this card. Don't ask me why (though I'm a computer engineer; just not very upto speed with AMD chipset). Also I run the fan at fixed speed of 75% from Trixx to keep temperature below 75C.
setx GPU_MAX_ALLOC_PERCENT=100
setx GPU_USE_SYNC_OBJECTS=1
COLOR 0A
vertminer.exe --scrypt-vert -o -u -p -I 20 --lookup-gap 2 -w 256 --gpu-engine 1000 --gpu-memclock 1500 --thread-concurrency 22528
I have the Sapphire R9 290X BF4 Ed. (53G) and I'm getting about the same hash of 440k at stock 1000/1250 (no power tune). If I try to OC @ 1100/1400, hash goes down to about 365K. This seems to be the best setting so far for mine...
vertminer.exe --scrypt-vert -o 127.0.0.1:PORT -u USERNAME -p PASSWORD --lookup-gap 2 --thread-concurrency 22528 -I 20 -g 1 -w 256On this PC I have an i7-4770k OC'd to 45x/39x mem @1600. No change in hash with mem @ 2133.
My ASUS monitor has 2 HDMI inputs so I can go into bios, enable IGPU, and connect HDMI out of ASRock Extreme4 mobo to HDMI(2) while HDMI out of 290x is on HDMI(1). While monitor is switched to HDMI(2) I can set fan speed to 50% via TRIXX to keep temp @ 80C and experience no video lag while mining.
My open case PC is using Sapphire 2x7950's and I'm getting about 530k (265K@) @ stock 925/1250 using...
vertminer.exe --scrypt-vert -o 127.0.0.1:PORT -u USERNAME -p PASSWORD --lookup-gap 2 --thread-concurrency 21000 -I 18 -g 1 -w 256Still playing around with settings but seems to be stable.