AMD has rolled out its ATI Radeon HD 4600 graphics card line, the mid-range stablemates of the high-end 4800 series it launched a couple of months back.

The initial line-up comprises the 4650 and 4670, each packing in 320 unified shader cores. Their 514m transistors are fabbed at 55nm. That, plus clever power conservation tech, allows the two cards to consume no more than 50W and 60W, respectively, under full load, AMD claimed.

While the 4670 will appear on boards with GDDR 3 memory, the 4650 reference design only extends to GDDR 2. A 512MB 4670 design is available now, with a 1GB version coming later this month. The 512MB 4650 board will ship before October, AMD said.

Cards based on the 4650 are expected to reach the $69 price point, with the 512MB 4670 boards priced at around $79. So you're probably looking at £40 and £50 over here when cards ship from all the usual suspects.

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