Thanks for all the advice guys.
I have just ordered a second 6870. It seems to me that this will offer the biggest improvement over what i already have. If I get a 7850 I will be relying on overclocking potential that will only "probably" be there, besides I will probably just want to crossfire 7850s in a couple of months if i get one now.
If the crossfire 6870 doesn't work out for me I can always sell and get a 7870.
Thanks again, and for reference with one 6870 (core 990, mem stock): Heaven 3.0 1080p 4x AA, Tesselation normal = score of 995.
I'll post a CF result in a couple of days.
I have just ordered a second 6870. It seems to me that this will offer the biggest improvement over what i already have. If I get a 7850 I will be relying on overclocking potential that will only "probably" be there, besides I will probably just want to crossfire 7850s in a couple of months if i get one now.
If the crossfire 6870 doesn't work out for me I can always sell and get a 7870.
Thanks again, and for reference with one 6870 (core 990, mem stock): Heaven 3.0 1080p 4x AA, Tesselation normal = score of 995.
I'll post a CF result in a couple of days.

