Bios Magazine posted a review on the Zotac 9800GTX AMP! Edition

Zotac's GeForce 9800 GTX AMP! Edition is the graphics card to get if you're looking for an excellent value single-card offering, with the ability to upgrade to SLI later-on. An overclocked 9800 GTX definitely makes it a lot more attractive than the stock speed version, and unlike other companies which only overclock the core, Zotac has done a complete overhaul by overclocking the core, shaders and the memory, resulting in the GeForce 9800 GTX AMP! Edition performing about 8- to 10% faster than a regular GeForce 9800 GTX. The only thing missing in the package is an SLI bridge. And to be picky we'd have liked a better game. But pound for pound, this card packs great performance, even if it's still not a huge improvement on the 8800 GTX. And it's even cheaper than PNY's GeForce 9800GTX OC XLR8

Zotac 9800GTX AMP! Edition Review