So I recently bought a new Gigabite Radeon R9 270 for around $230. With proper config, I reached 450 kH/s.

"setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS=1

cgminer --scrypt -o xxx -u xxx -p xxx -I 19 -g 1 -w 512 --thread-concurrency 15232 --temp-target 63 --temp-cutoff 85 --lookup-gap 2 --gpu-memdiff 0"

My question is, should I believe my cgminer or pool stats with kH/s?