Just after Nvidia's GTX 295 managed to snatch the lead from the HD 4870 X2, AMD announced that its RV770 graphics is coming to mobile devices. The company announced its range of Mobility Radeon HD 4000 GPUs for notebooks, and it seems like notebook users have got a lot to look forward to.

The Mobility Radeon HD 4800, of course, is derived from the RV770 and it resembles its desktop siblings. It features 800 stream processors, GDDR3 and GDDR5 memory support, 256-bit memory interface and CrossFireX support.

The low-end Mobility Radeon HD 4500 and 4300 come with 80 SPs, 242 million transistors, DDR2, DDR3 and GDDR3 support, and feature a 64-bit memory interface and 12.8GB/s bandwidth.

The Mobility Radeon HD 4600 comes with 320 SPs, 514 million transistors, DDRR2, DDR3 and GDDR3 support and features a 128-bit memory interface and 25.6GB/s bandwidth.

What would be the top end mobile graphics, the Mobility Radeon HD 4800, comes with almost full RV770 spec's – 800 SPs, 956 million transistors, GDDR3 and GDDR5 support, 256-bit interface and 89.6GB/s bandwidth.

AMD also adjusted speeds and did some polishing in order to make these less power-hungry and the company claims the fastest offering, the Mobility Radeon HD 4800, to consume 75W at max, which is quite nice given the features.

The company also included switching between discrete and integrated graphics without rebooting, which can be done automatically as well as manually, and this feature is supposed to work with Intel’s chipsets too.

Well, if AMD managed to score many deals with their Mobility HD 3000 series, then the 4000 series should be an instant hit as these are some quite impressive numbers for mobile components. At least it would give the company some operating cash so that they can concentrate on getting their CPUs back to equal or at least competitive terms with Intel.

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