Bigbruin.com has posted a review on the Sapphire Radeon HD4770 512MB Graphics Card
In use the Sapphire Radeon HD4770 512MB graphics card performed admirably. It is not the ultimate gaming solution (and doesn't claim to be), but for about $100 it is definitely impressive. It can put up solid numbers in games with the settings turned up and it won't make your electric meter spin out of control in the process.Sapphire Radeon HD4770 512MB Graphics Card Review