Original URL: http://www.reghardware.co.uk/2009/01/12/amd_mobility_radeon_hd_4000_series_gpus/
AMD upgrades mobile GPU lineup for laptops
Or: Honey, I shrunk the Radeon HD 4000 series
12th January 2009 22:41 GMT
AMD's RV770 graphics processor went portable at the Consumer Electronics Show with a new range (http://ati.amd.com/products/hd4000seriesmob.html) of Mobility HD 4000 GPUs for notebooks.
The ATI Mobility Radeon HD 4000 series GPUs are similar to their desktop cousins (http://www.reghardware.co.uk/2008/11/27/review_amd_radeon_hd_4000_series/) in many respects and will come in flavors for high-end gaming laptops, low-cost notebooks, and the mobile machines in between.
At the top of the line are ATI's 4850 and 4870 models, sporting 800 shaders, support for GDDR5 and GDDR3 memory types, a 256-bit memory interface, and CrossFire support.
At the mid-range are 4670 and 4650 GPUs with 320 shaders (that's the same as the previous top-end Mobility HD 3000 series, except consuming less power). The 4600 models support DDR2, DDR3 and GDDR3 memory, a 128-bit memory interface, and CrossFire support.
Filling the low-end segment are 4300 and 4500 GPUs with 80 shaders, support for DDR 2, DDR 3, and GDDR 3 memory, a 64-bit memory interface, and alas no CrossFire support. Obviously, the focus here is battery life.
All the 4000 series mobility GPUs support DirectX 10.1, streaming 7.1-channel audio through HDMI ports, and HD playback up to 1080p.
Or if you prefer a chart for such things:
| SPs | Memory types | Transistors | Memory bandwidth | Compute Power | |
| HD 4800 | 800 | GDDR 3, GDDR 5 | 956 million | 89.6GB/s | 800GFlops |
| HD 4600 | 320 | DDR 2, DDR 3, GDDR 3 | 514 million | 25.6GB/s | 432GFlops |
| HD 4500 & 4300 | 80 | DDR 2, DDR 3, GDDR 3 | 242 million | 12.8GB/s | 108GFlops |
The first notebooks with the 4000-series GPUs are expected to rollout this quarter. ®