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Can this be placed in the 09 Quad MP???

It has six cores...

http://www.newegg.com/Product/Product.aspx?Item=N82E16819117176

Edit: I just noticed its socket 604...is this a new tech or old? I just noticed it for the first time today.

This CPU was introduced in Q3 2008 per Intel marketing information, so it's not as new as those used in the Mac Pro. Just because it's 6-core doesn't mean it's newer, as Intel has many types of Xeon variants for server applications. You'll note that this CPU retails for over $2,000 per chip in 1k quantities! :)
 
Mac Pro used LGA771 until 2008. Nehalem switched to the LGA1366 socket. So the answer is NO. The new QPI CPUs have a lot more contacts. So it looks like old tech.
 
Socket 604 is an older Xeon socket for quad processor sysems. Not core but processor. I don't see how much you can enjoy 24-cores.
 
Won't work.

The only possibility for additional cores per CPU, is the Gulftown (6 cores). But Apple won't release the firmware update (added microcode for the new parts) needed to make it work, or they'd lose sales on the next revision. And I wouldn't expect it to work without the updates to the firmware.
 
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