I think I will go for the 470 recommended earlier.  I was just curious as I can get 2 of the 460's for the price of one 470

I'm getting around 59-60 on my msi 7850 2GB at 1000/1200

Maybe, but IF the difference is from the BIOS it is not much in that case.
My stock Sapphire (Hynix) is doing 158 Sol/s at these clocks. But the higher clock speeds do not make much sense - at 1050/1250 it is doing nearly the same: 151 Sol/h. Probably I could go even lower, but did not test it.

Alright I included the links and instructions for the Stilt BIOS for the Reference R9 290 in my Bios hacking thread

https://bt.irlbtc.com/view/1676474

Try it and see if it makes a difference. They are all Stilt work that he made for Litecoin mining back in 2014.

The 290x is with Stilt BIOS.

The rig has 2 x 290 and 1 x 290x - all flashed with Stilt BIOS.

After I achieved my power savings, I didn't bother with speed settings and just let it rip.

Your 290x got Hynix? Can you try running at 1100/1475 and see your results?

I love Claymore's v6.0

7 MSI RX470s: 985 H/s
955 Watts at the wall
68 ave Watts (MSI Afterburner)
57C ave GPU Temp (MSI Afterburner)
47C CPU Temp
1500 Strap
MSI Afterburner settings: 1950 Memory Clock, 1150 Core Clock

If you got the Reference R9 290 you can always remove the backplate, for lower temps. Makes a huge difference for me, except hanging it later requires some zip ties.

http://semiaccurate.com/2013/11/11/diy-amd-radeon-r9-290x-heatsink-mod/

thanks adaseb -- I am so going to do this. These cards runs hot and also loud, but they are as good as 390s (maybe because there same cards... LOL)

How do you do that ? Custom rom ?