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AMD Radeon HD 2900 XTX tested on web

Little benefit over XT

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Two days ago, AMD's upcoming ATI Radeon HD 2900 XT was given an early and unscheduled trip through the latest benchmarking software. Now it's the turn of the Radeon HD 2900 XTX.

Website DailyTech took a sample of the XTX card with a core clock of 750MHz and 1GB of GDDR 4 clocked to 2020MHz and ran it against an Nvidia GeForce 8800 GTX. For comparison it also re-tested the 745MHz core, 800MHz memory Radeon HD 2900 XT, equipped with 512MB of GDDR 3.

The tests used retail drivers ATI released to its board partners. The GeForce 8800 GTX is a vendor-overclocked board running at 650MHz with 1000MHz GDDR 3 memory. The test system comprised a four-core Core 2 Extreme QX6700, Asus 5N32-E SLI mobo and Corsair 800MHz DDR 2 memory.

Game tests: 1280 x 1024
AMD ATI Radeon HD 2900 XTX benchmarks - 1280 x 1024
Frame rates - longer bars are better
Data courtesy DailyTech

Game tests: 1600 x 1200
AMD ATI Radeon HD 2900 XTX benchmarks - 1600 x 1200
Frame rates - longer bars are better
Data courtesy DailyTech

Game tests: 1920 x 1200
AMD ATI Radeon HD 2900 XTX benchmarks - 1920 x 1200
Frame rates - longer bars are better
Data courtesy DailyTech

The bottom line: on the basis of these tests at least, the XTX doesn't provide much of an advantage over the XT. Since the core clock speed difference is just 5MHz, and the two GPUs are otherwise identical, clearly the gain - typically amounting to less than two extra frames a second - comes from the extra 512MB of GDDR 4.

Watch out for Register Hardware's full review of the AMD ATI Radeon HD X2900 series next month.

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