Posted: 11:14 AM ET

It seems generous grandmothers aren't the only ones purchasing PlayStation 3 (PS3) consoles this holiday season. The U.S. Dept. of Defense has announced plans to buy an additional 2,200 PS3s to complement a military supercomputer cluster running on 336 PS3 systems.

The military purchase was likely encouraged by Sony's recent PS3 price cut, which brought the price of a single console down to $299.

A military justification of review document explains the decision:

Though a single 3.2 GHz cell processor can deliver over 200 GFLOPS, whereas the Sony PS3 configuration delivers approximately 150 GFLOPS, the approximately tenfold cost difference per GFLOP makes the Sony PS3 the only viable technology for HPC applications.

According to Ars Technica, Sony sells the PS3 at a loss and hopes to make back the difference by selling games and accessories.

The reason that the PS3 is a more cost-effective way to buy Cell-powered GFLOPS than, say, the Cell blades that IBM actually makes specifically for supercomputing applications, is that the consoles come with a big, fat subsidy from Sony.

However, the military isn't likely to purchase any games for these PlayStations. The justification review states the systems will run a proprietary Linux-based operating system, which probably won't be able to play Call of Duty: Modern Warfare 2.

Posted by: Wes Finley-Price -- CNN.com Webmaster

Filed under: consumer tech  Games  Gaming