Hally_57 Posted June 6, 2009 Share Posted June 6, 2009 Hi Does anyone know if 2x Intel Xeon W5580 Quad 3.2Ghz LGA1366 Nehalem CPU will work on this mac pro logic board 661-4307 i bought Link to comment https://www.insanelymac.com/forum/topic/169512-mac-pro-compatibility-upgrades-ie-cpu/ Share on other sites More sharing options...
lastowl Posted July 5, 2009 Share Posted July 5, 2009 in theory yes aslong as vanilla kernel would run it snow kitty should Link to comment https://www.insanelymac.com/forum/topic/169512-mac-pro-compatibility-upgrades-ie-cpu/#findComment-1193076 Share on other sites More sharing options...
bonestonne Posted July 6, 2009 Share Posted July 6, 2009 661-4307 is only LGA 775, the new Core i7 processors are a completely different socket. There are no Apple Logic Boards which support Core i7 at this time that I'm aware of, so I'd save your money and skip i7 for now, because it isn't going to work. Do keep an eye on the Intel names that are included with your Logic Boards...if it says Clovertown, then you should look up the Clovertown name and see what's said about it, it will tell you the socket type with a simple google search. Clovertown is LGA775, what you're looking to buy is Nehalem, which is the LGA1366 package...right off the bat, you should realize that LGA1366 =/= LGA775...they are not and will never be cross compatible because Core i7 utilizes an integrated memory controller like that on AMD processors since the Athlon 64 was released. This increases bandwidth and removes the need for a dedicated Northbridge. On an old computer, your RAM had to "talk" to the northbridge before it could "talk" to the CPU, and with the new Integrated Memory Controller, the RAM now "talks" directly to the CPU removing the bottleneck and creating huge amounts of bandwidth. Also, the Front Side Bus was removed from Intel processors with the new i7 package, being replaced by GT/s, which is the GigaTransfer rate per second, for the new i7 it's a maximum of 6.4GT/s which is the Core i7 965, the fastest model. This isn't even the first time I've seen someone look to put i7's on an LGA775 platform...i think people need to check details more closely. Link to comment https://www.insanelymac.com/forum/topic/169512-mac-pro-compatibility-upgrades-ie-cpu/#findComment-1193246 Share on other sites More sharing options...
akira9000 Posted July 6, 2009 Share Posted July 6, 2009 There are no Apple Logic Boards which support Core i7 at this time that I'm aware of, so I'd save your money and skip i7 for now, because it isn't going to work. Thats not right. The current Mac Pros use Nehalem i7 so they have i7 motherboards Link to comment https://www.insanelymac.com/forum/topic/169512-mac-pro-compatibility-upgrades-ie-cpu/#findComment-1193425 Share on other sites More sharing options...
bonestonne Posted July 6, 2009 Share Posted July 6, 2009 either way, i clearly stated "that i'm aware of." you simply gave knowledge i didn't know. quite simply put, the logic board 661-4307 is LGA775, and that's not going to change. Link to comment https://www.insanelymac.com/forum/topic/169512-mac-pro-compatibility-upgrades-ie-cpu/#findComment-1193970 Share on other sites More sharing options...
vbetts Posted July 7, 2009 Share Posted July 7, 2009 either way, i clearly stated "that i'm aware of." you simply gave knowledge i didn't know. quite simply put, the logic board 661-4307 is LGA775, and that's not going to change. Wrong, it's lga 771. More voltage compared to 775. Link to comment https://www.insanelymac.com/forum/topic/169512-mac-pro-compatibility-upgrades-ie-cpu/#findComment-1194197 Share on other sites More sharing options...
bonestonne Posted July 8, 2009 Share Posted July 8, 2009 point taken. but back to the OP's question, still not LGA1366. Link to comment https://www.insanelymac.com/forum/topic/169512-mac-pro-compatibility-upgrades-ie-cpu/#findComment-1195067 Share on other sites More sharing options...
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