Got one asus r9 290
GPU temprerature increases up to 90 C and fan speed to 100%
Is that okay or i need something to do?

My bat:

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 80
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 80
setx GPU_SINGLE_ALLOC_PERCENT 80

EthDcrMiner64.exe -epool stratum+tcp://eth-eu.dwarfpool.com:8008 -ewal wallnumber -epsw x  -tt 84 -ttli 86 -r 30  -tstop 90 -ethi 6