jyjjy :
The GTX 550 Ti is similar in performance to the HD6770 but priced noticeably higher. Unless you really want a Nvidia card it isn't a good choice for the money.
I'd like to comment on this, because I see the 550 ti get repeatedly bashed on this site (and other places) and I would like to get a better understanding of specifics for why. I want to also say upfront that I'm not an expert on these matters, and I am new to these forums, but I did some research before buying and I came away with feeling the EVGA 550ti was a better overall choice, and after installing it and updating their recent driver I feel it's an excellent choice. It also has a very high consumer rating at Newegg with few major negatives.
The first major knock I see is that the price is noticeably higher as jyjjy states. I paid $120 for mine, and most of the 6770's were either around that price or at most $20 cheaper. I don't really think that's a big factor overall. This card is also 3D ready, and as someone that does graphics and works on images instead of purely gaming, I think it's worth having this now instead of having to "chip up" in another year.
I also see most of the comparisons of these two cards (lets keep it to these two for the moment) as being very generic. I looked at several brands and felt that EVGA was a better card. My older card that this one replaced was an EVGA 9800gtx, so I'm sure my history with the company also factored in, but I think there is good reason to like their card and software. As you say, if you want a Nvidia card maybe you are ok with paying a little more for it.
Beyond the brand rep (EVGA and Nvidia) which is important to me at least, they have some really good product software. I'm sure you all know about the overclocking software and what not, but their PureVideo technology makes a difference. And for the average joe user (that's me!) when companies make things easy to use and reliable I don't have to deal with it when I'm using the computer to do things.
All of the comparisions I see are not using the EVGA cards so I have to wonder the impact, especially if you factor in their updated driver. I would love to see a real actual hardware test with these factors compared to the best of the best 6770 card. Then I would be fine with how things pan out and may the better card win.
I hope I'm not ruffling feathers here. I'm not trying to bash the 6770 card. I nearly got it instead of the 550ti, but I'm hoping to have some of you guys that are more knowledgeable than I am about these matters help me to understand why this card such a whipping post here.