Mac Pro 4,1 Processor
What socket type does the 2009 Mac Pro 4,1 use I have a 8-core Mac Pro and I am wanting to upgrade my processors to a 12-core but I am having trouble finding out if it uses the LGA 1150 or the LGA 2011 and I am also having trouble deciding if I should go with an Ivy Bridge, an Ivy Bridge-EP or a Sandy Bridge. Any input would be greatly appreciated.
iMac, OS X Yosemite (10.10.2)