ATI Shipping Radeon HD 4890 1GHz Factory Overclocked Video Cards
 

When ATI, the graphics division of AMD, first launched the Radeon HD 4890 video card at the beginning of April, we noted that the RV790 core it uses had a few tweaks in it. It is a respin of the original RV770 silicon, with retrained and rearchitectured power paths for greater power efficiency. We also noted that ATI engineers also used decoupling capacitors in a decap ring to increase signal integrity.

This enabled ATI to boost the core clock to 850MHz, up 100MHz from the Radeon HD 4870, but several reviewers were already overclocking the board up close to 1GHz using stock cooling for an additional performance boost.

Now, ATI and its Add-In Board partners are shipping factory overclocked graphics cards set at 1GHz, the first to break the 1GHz barrier using standard air cooling solutions. This enables the GPU to achieve 1.6 TeraFLOPs, a large jump over the 1.35 TeraFLOPs of the stock Radeon 4890. The GDDR5 memory may also be clocked higher, depending on the board partner.

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