Hi there, today i've been trying to OC my 5830's but the problem is its always getting around 277-280 khash/sec
this is from about 920mhz - 1025mhz (which froze after 10mins)
reading other peoples posts they seem to be getting 300+ with clocks of 975MHz and up.
I have tried different miners and different settings on all of them, nothing seems to make the hash rate any higher its always around that same mark with some changes in config making it drop a bit.
Is there a bottleneck in my system?
I'm running this on Linuxcoin v0.2a off a USB drive. system specs are..
AMD Sempron Processor 140 2.7GHz
Antec 620W ATX NEO ECO PSU
Kingston ValueRAM 1GB 1333MHz DDR3 Non-ECC CL9 DIMM
MSI 870A-G46 AM3 AMD 870 ATX AMD MBD
2x Sapphire HD5830 Extreme 1G GDDR5 256bit PCI-E Video card
Does anyone have any idea why i cant get over 280kh/sec? I have gone back to 875/225 for the time being which gets me 255khs (sick of the extreme fan noise, will put in another room once i get it oc'd properly)