Legit Reviews posted a review on the HIS Radeon HD 4870 CrossFire Video Card

Last week, AMD was forced to release the ATI Radeon HD 4850 graphics cards early since some retailers had already started selling the card to the public before it was launched. This week AMD has released the the Radeon HD 4870, which is priced at $299. This is the big brother to the Radeon HD 4850 and features higher clock speeds and newer cutting edge technology like GDDR5 memory ICs for improved memory bandwidth.

HIS Radeon HD 4870 CrossFire Video Card Review