New
#11
The biggest difference is the extra 320 streams....7770/640 streams.....6850/960 streams....8 extra texture units, 16 ROP's, and 128 more memory bandwidth for the 6850
AnandTech - AMD Radeon HD 7750 & Radeon HD 7770 GHz Edition Review: Evading The Price/Performance Curve
Yes the 3.0 will outdo the 2.x's .....if you have enough card to use all the extra bandwidth....
If you are worried about a bad card get a XFX....now you MUST register the card in 30 days on their website (took me 3 tries before it took) Lifetime warranty.....Here's something interesting Newegg.com - XFX Double D HD-687A-ZDFC Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
I doubt any of these cards will hit $100