With the launch of the GeForce GTX 295 last week, NVIDIA has started to roll out its 55nm GT200b GPUs onto the market. Today the company is rolling another new graphics card – the GeForce GTX 285 – but unlike the GTX 295, the 285 utilizes just a single GT200b GPU.

We spent some time going over the minor changes made in the GT200b during our GeForce GTX 295 review, so we will not spend a lot of time going over them again here. The best way to think of GT200b though is that it’s just GT200 on a finer manufacturing process with a few small enhancements.

The GeForce GTX 285 is coming to market to replace the GTX 280 which has been NVIDIA’s flagship product since last June. Like the GeForce GTX 280, the GTX 285 features a full 240 stream processors arranged into ten stream processing clusters, 80 texture units (eight per cluster) and 32 ROPs backing out onto a 512-bit memory interface.
http://www.bit-tech.net/hardware/graphics/2009/01/16/NVIDIA-zotac-geforce-gtx-285-1gb/1