Belgian University constructs desktop PC that equals processing power of a Cluster

Researchers of the University of Antwerp assembled a desktop PC with four dual GPU videocards. Their research group Astra is focussed on combining 2D images from different angels into a 3D one.
Because these calculation are perfect for parallel computing, the researchers had a look at GPUs. Each graphics processor (GPU) contains 128 small subprocessors that can all work in parallel. They plugged four 9800GX2 videocards on a desktop motherboard and used Cuda to write their software. Thanks to this, the images can be constructed in hours instead of weeks if this was done on a PC with a Quadcore. The PC dubbed 'Fastra' based on normal consumer hardware should be as fast 350 modern CPU's. Compared to a real cluster, the costs are a lot lower and it saves a lot of space. Price: less then 4.000 Euro.

Now I wonder how fast it can calculate hashes?

(Source: Tweakers.net)

Bonus: They have a video and more images available.

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