Although the ATI Radeon HD 4850 and HD 4870 were launched nearly four months ago, they are both still exciting cards and we look forward to testing each and every one that enters our labs. For our latest article, we have another “TOP” card from ASUS in house, in the form of the EAH4870 TOP, which of course is a factory overclocked Radeon HD 4870. Like most other HD 4870s on store shelves, the EAH4870 TOP sports 512MB of GDDR5 memory and a 256-bit memory bus. Additionally, the card features support for DirectX