XSReviews has reviewed the ATI HD 5770 grapics card
A quote from the article:
>> ATI HD 5770 Review
ATI recently jumped ahead of their closest rivals nVidia by releasing their latest generation of GPUs upon the market, just before the launch of Windows 7 in an attempt to cash in on the early adopters of Direct X 11. However, like always the first run of cards made available were mind blowingly expensive, so what's a mid-ranger looking for an upgrade to do? Fortunately it wasn't long before the slightly more mid-range options were made available, the 57xx series.
For those with an aging 7 or 8 series card from nVidia - or a 3 or mid level 4 series from ATI - still powering your gaming rig, this could well be the card that you upgrade to. Is it worth it though? Let's find out.
>> ATI HD 5770 Review