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I need a 40 core PC


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I think the line was "If you have to ask, you can't afford it" :)

 

It's not actually a 40-core PC, it's 5 8-core PCs with clustering software. I bet you could make you own cheaper using 10 4-node rackmounts and the same software (anybody can get it, it's from Microsoft). The idea isn't really anything new - Google "beowulf cluster" and you'll find university guys in the late 90s or early 2000s who came up with an architecture for a Linux cluster that could make it onto the world's-fastest-computers list for $100k. Some other guys did the same thing using G3 iMacs (setting a new benchmark for supercomputer color schemes).

 

With Beowulf, you could use n of any type of PCs, where n=(2^x)+1 (the 1 being for the control server). The key components of the system were a task manager and a network topology using 2 ethernet adapters per PC, one being a standard 100/1000 card hooked up to a standard switch and the other being a card with 4 ports going directly to 4 PCs, so the server accessed the nodes via the conventional network and the nodes communicated with each other via a mesh style network where computers could communicate very quickly with their nearest neighbor.

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