Scrypt mining hardware

Hi All,

I have just started scrypt mining I currently have 2 x Sapphire Dual-X 280x cards and a minimal sempron system.

I am currently runing at 1.4mHash/s drawing 490W.

I have modified the bios to undervolt to 1.050V and then control it with cgminer to up to 1.08V which is currently stable @ 1020MHz core and 1500MHz memory 1.08V.

I would like any advice on how to keep the hash rate up but reduce the power draw or even increase the hash rate and remain at the same power draw.

I am currently mining on middlecoin which seems quite profitable.

I am running the two cards in the board at the moment while I wait for risers would it be safe to assume once I get the cards separated and the temps go down I will draw less power due the the resistance reducing?

Thanks in advance.

-- Sirhcjw