ATI's Radeon X550 chip doesn't appear on the company's website, but that hasn't stopped Taiwanese vendor Info-Tek announcing a pair of graphics cards based on the part.
A mention of the X550 has also been found lurking in ATI's latest Catalyst driver, 5.6, verifying that it's a genuine ATI product.
The driver reveals the X550 is essentially a higher-clocked X300. It's based on the same core as the older chip, the RV370, with four pixel pipelines and a pair of vertex engines. While the X300 is clocked at 325MHz, the X550 comes in at 400MHz. That ups the fill rate from 1.3bn texels per second to 1.6bn.
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The Register
