Best hash per watt (J/hash)

[Grim]

I wanna know your guys opinion about best hash per watt for BTC and/or LTC.

As far as i know:


HD 7790

HD 7850

HD 7950


Any insights?

[crazyates]

I have a Jalapeno sitting next to me doing 5.5GH/s for 45watts. 

That said, get any voltage unlocked 7950 or 7970. They can reach some impressive numbers for a GPU. However, you want to look at profitability, not most energy efficient. Here's what I mean:

Click for larger image:


I can undervolt to increase my MHs/watt to 2-2.5x stock, but I actually lose profitability.

[miningdude]

@crazyates, rather than clamor for your order #, I'll just say Congrats!

And yes, I would agree the 7950 and 7970 are the best cards. In my mining experience the 7950 runs a bit cooler than the 7970 so you can push it further. There are a few FPGA's being re-sold around the forum that would have a pretty good hash to watt ratio. I wouldn't pay more than $1 per Megahash though at this point (for example $860 for an 860Mh/s FPGA).

[Grim]

very nice chart, thank you

still would like to know about 7790's