hey guys, i'm runing Linux BAMT 1.5.2 with the djm34-x11mod. I have one Sapphire R9 290X Tri-X Toxic non-OC (4gb) and three Sapphire R9 280X Tri-X Toxic OC's (3gb) in the same rig and i'm not sure why the 290X only does ~3500kh/s when the 280X's are running at 3325kh/s each.

djm34-x11mod.conf is as follows:

"kernel" : "x11mod",
"intensity" : "21",
"xintensity" : "0",
"rawintensity" : "0",
"gpu-threads" : "1,2,2,2",
"lookup-gap" : "0",
"thread-concurrency" : "30464,22336,22336,22336",
"shaders" : "2560,2048,2048,2048",
"gpu-engine" : "1000,1175,1175,1175",
"gpu-memclock" : "1500,1600,1600,1600",
"gpu-fan" : "0-75",
"gpu-memdiff" : "0",
"gpu-powertune" : "0",
"gpu-vddc" : "0.000",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"auto-fan" : true,
"auto-gpu" : true,
"temp-target" : "70",
"temp-overheat" : "80",
"temp-cutoff" : "90",
"temp-hysteresis" : "3",
"no-submit-stale" : true,
"no-pool-disable" : true,
"failover-only" : true,
"failover-switch-delay" : "60",
"queue" : "1",
"scan-time" : "7",
"shares" : "0",
"tcp-keepalive" : "30",
"expiry" : "28",
"log" : "5",
"kernel-path" : "/usr/local/bin",
"api-listen" : true,
"api-mcast-port" : "4028",
"api-port" : "4028",
"api-allow" : "W:127.0.0.1"

any input would be great because i should be getting quite a bit more out of the 290X from what i've been reading/trying on here.

whats up with the VTC pool? should i just give up on this thing? 

i'm having a little trouble getting my Sapphire R9 tri-x 280x Toxic over the 300kh/s mark.

i'm running bamt 1.3 modded with vertminer 0.5.4pre2

.conf looks like this:


the second parameters are for the sapphire R9 290x Tri-X (non-OC) which runs at 490kh/s no problem.

i've tried changing the TC/ENG?MEM up and down, trying different stuff i've read on here, but it really doesn't even make any difference.

got it sorted, running bamt 1.3 getting ~750 from the 280x and ~950 from the 290x 0.085% returns total.

So i was running 2 sapphire R9 280X Tri-x OC's and one of them died after i undervolted it to 1.087mv (the other one was fine but put it back to 1.093 just incase). so since i have to RMA it cause it was a week after the store 15 day direct exchange, it'll be gone for about month+ according to althon. So i started looking for another 280x cause i was gonna run 3 eventually once i got my risers and another pci-e cable from corsair. i couldn't find anything at a decent price that would be worth it so i stopped by the place i got the rest of the rig from and they had an open box sapphire R9 290x Tri-X so i figured why not spend the difference.

so i get everything up and running and the 290x runs about 925kh/s but my remaining 280x dropped down to under 600kh/s. Before the 290x in bamt i was getting 750kh/s from each of the 280x's with like 1-2% returns tops.

i put it back into win8 and cgminer is doing the same thing only about 5% lower on both cards (which is why i was running bamt). config looks like this in win8:

timeout /t 30
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
COLOR 0A
cgminer --scrypt -I 13,20 -g 2 --thread-concurrency 8192,25601  --gpu-engine 1080,950 --gpu-memclock 1500 -o stratum+tcp://us-east.multipool.us:7777 -u xxxxx -p xxxxx

I can run the TC at 32765 in bamt but if i try that in win8 it hangs the card and gets disabled,

i just flashed my 2 Sapphire 280x Toxics using VBE7, i flashed the UEFI bios though (press the button near the crossfire connector so it lights up blue), not the legacy, works fine both cards stable at ~750kh/s each @ 1.1v. I might try dropping the voltage further, but pretty happy with the results at 1.1v

also my whole system was only drawing ~525w running windows off an SSD, might be lower now that i'm running linux bamt 1.3 off a USB 3.0 drive. My PSU is a Corsair AX860i, mobo is asus M5A99X Evo R2.0 with a Sempron 145 CPU.

the hardware comparison guide says they only draw 253w eac, and that's about what i'm seeing, not sure what's up with your system.