After a couple days of reading, and messing around mining with my nVidia Refference 8800GT and MSI Twin-Frozr 250GTS I decided to make a small investment into mining bitcoins.
I found a dam good deal on Newegg for Sapphire Radeon HD 5830 and tired of seeing my crappy 70MHash/s out of my overclocked nVidia Cards, I took the plunge and got 2 of the 5830's.
Figured may as well, even if I don't make anything back, I still got a decent pair of cards to run in XFire.
GA P55-USB3 Motherboard
Intel i5 720
2x Sapphire Radeon 5830's ( not x-fired )
2x Craptastic 550W PSU's
Installation of the cards running stock, gave me about 200-216 MHash/s each
- POCLBM Flags ( -v -w128 )
I tuned the cards using ATITrayTool http://downloads.guru3d.com/download.php?det=733
I have been running the cards stable at 985/600 for 3 Days, using POCLBM Flags ( -v -w64 -r2 -f1 ) and getting 300-306MHash/sec
The fans are running at 100%, and I have a box fan blowing into the open case ** Yes sounds like a jet engine **
GPU Temps sit around 60-63C
I'm trying to figure out how on earth some of the 5830 users are getting their memory clocks down to 300. As soon as I go lower then 550MHZ Memory clock, the card crashes.
Any thoughts on why I can't lower my memory clock speeds, or suggestions.