The review quality is basically the same for either card: ~50% love it, ~20% hate it, and the rest are evenly distributed in between. Many of the poor quality reviews have to do with driver issues, and based on personal experience I honestly think these are non-issues. Either ppl not knowing what they're doing, using the wrong drivers, tainted nasty 5-yr old Win install, or, a small % just truly getting unlucky.
I am going to buy one of these in the next 24 hrs -- leaning towards the "1GHDAP" -- and looking for some last minute advice on the practical difference between these two models. I see a slightly faster memory clock, but 1st of all, is that the only difference, and 2nd of all, is that feature even going to affect performance 1%?!
Also, the Radeon 3850 AGP is in the running... I own one in another system and it is pretty impressive for a $100 card. It's no longer on newegg but I found it for $95 elsewhere. Is the 256-bit memory bus going to be considerably faster than the 4670s? The user prefers better performance @ medium-ish settings over worse performance @ top-quality settings (textures, etc.)
I think the performance is around the same I just looked at http://www.tomshardware.co.uk/charts/gaming-graphics-ca... . I don't think there is any difference between the 2 4670s. The link to the cheaper 3850 is a PCI Express card while the 2 4670s are AGP and AGP seems always more expensive since its getting less common. I assume you know which you need if not make sure you find out before buying anything.