2x Xeons = More Cache?

[e.geric50]

So yp im planing to build a workstation with 2x x5680 and i want to know will i have 24mb cache in total? or ill still have 12mb? because each xeon haves 12mb of cache.

 

[rgd1101]

each cpu use it only set of 12mb cache

 

[BFG-9000]

To be specific, a program running on any single core would be able to use 256k of L2 cache and up to 12MB of L3. If you have only two programs running and they run on separate CPUs, then each would get their own 12MB of L3, so you could have all 24MB of L3 in use with as few as 2 programs running.