What is the best CPU upgrade for a Mac Pro 4.1 2009 Quad 2.66 ?

CUP upgrade?? easy, Dubble D for sure! >

 

the most cost effective is a w3680 3.33 hex. around 600

sellers on ebay

http://www.ebay.com/sch/i.html?_trk...&_sticky=1&_trksid=p3286.c0.m14&_sop=16&_sc=1

it is a bit harder to do with the 2.66 2009 quad as you need to do an efi update


this shows how to do it with a 2010 but there is a link on how do the efi for your year.

http://forums.macrumors.com/showthread.php?t=1122551&highlight=


your machine will boost to 16500 on geekbench

 

you can do the w3690 it costs 1000 for a new one. it is the fastest. There is a link on how to change your 2009's efi.

to the forum users please post the link on this thread .

tia Phil

 

You can drop in a W3580 3.33GHz 4-core no issues. These are very hard to find and will cost you over $1,000.

Or you can upgrade the firmware to a 2010 that I'm sure is not authorized by Apple: http://forum.netkas.org/index.php/topic,852.0.html

Now you can drop in a W3680 3.33 6-core and make it fly like a new machine. These CPU's can be purchased anyplace for $600.

 

Any Nehalem is drop in (Fastest 3.33GHz Quad). Any Westmere will need EFI update (Fastest 3.46GHz 6-core). The sweet price point is the W3670 3.2GHz 6-core @600.00 and W3680 @650.00. $350.00 more for 133MHz is a rip off but the bragging rights would be yours