PLS Help with Hashrate VTC of r9 280x :(

[alesx.onfire]

Hi guys,

I have a low hashrate with my R9 280x oc
my config is :

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
COLOR 0A

vertminer -o stratum+tcp://vertpool.org:3333 -u alesxonfire.1 -p 2323 -v 1 -w 256 -I 13 -g 2 --lookup-gap 2 --gpu-powertune -20 --temp-overheat 82 --temp-cutoff 85 --gpu-

memclock 1500 --gpu-engine 1000 --thread-concurrency 8192

And i'm only getting 260kh/s and WU 230m/
What's the problem with my settings?

Could you helpme?

My specs:
sempron 140
4gb ram
sapphire r9 280x OC dual x
win7 32bits
vertminer 0.5.3
AMD drivers 13.12

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[Equate]

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
COLOR 0A

vertminer -o stratum+tcp://vertpool.org:3333 -u alesxonfire.1 -p 2323 -v 1 -w 256 -I 13 -g 2  --gpu-powertune -20

memclock 1500 --gpu-engine 1020 --thread-concurrency 8192

try these settings and what hash rate are you getting ?