yonyz :
Derbixrace: But it isn't the same price range. The HD5670 is 500NIS while the HD4850 is 600. I would pay the extra 100NIS for the HD4850. If I had them, that is.
The 5670 performs somewhat better than the standard 9800GT/4830 tier.
It performs almost equal to the 4770/8800GTS 512mb tier, and below the 4850/9800GTX.
So the performance difference is probably around 15%ish... you have raw power vs runs cooler/better power consumption/dx11 support.
I'd probably get the 5670 if I didn't have a GPU, or another 4850 for Xfire if I already had one.