Looking at the specs of the card it is actually quite similar to the Radeon 3800 cards which were ATI's best in the previous generation. The Radeon HD 4670 features an engine clock speed of 750MHz and 1GHz (2GHz effective) for the 512MB GDDR3 version and 1GB for the 900MHz (1.8GHz effective) version. Both feature two dual-link DVI output and TV output and consume under 75W. The Radeon 4650 features an engine clock speed of 600MHz and a memory speed of 500Hz with 512MB of DDR2 but we did not have one to test today.



Link: AMMDZone