HardOCP posted a review on the AMD Radeon HD 4770
A quote from the article:
>> AMD Radeon HD 4770 Review
As gamers we all want fast video cards. Fast video cards give us the performance in demanding games that allows an enjoyable gameplay experience. Typically, in this video card market, you get what you pay for. Higher priced cards are faster, and the fastest of the bunch can take you near $1000 when configuring a multiple-GPU setup. When it comes down to it, not everyone can afford these high priced video cards, and both AMD and NVIDIA know this. The real money is made in the mainstream and low-priced OEM realm.
>> AMD Radeon HD 4770 Review