LGA775 vs LGA771

[Rocks7ar]

What is the difference? I know server/ workstation, but the technical difference.

 

[jmmtn4aj]

Well, it's got 771 pins instead of 775 for one..

 

[Rocks7ar]

Thats what I thought.

 

[jw0ollard]

Well, the important difference is that 771 motherboards have 2 sockets for 2 CPUs. 775 doesn't support multi-socket setups.

I want my future build to be an 8 to 16-core Xeon setup. And don't hate, I actually *need* as many cores as I can get!

 

[heyheybooboo]

I think with Intel the primary reason is economic as opposed to technical - to prevent the use of desktop CPUs in server multi-socket mobos. Intel wants to sell you the complete platform - server or desktop - with their own chipset, graphics, mem controller, etc

Same thing with AMD - though the IMC complicates a bit. 2-way/4-way Opty's (and the Barc's I've seen) have socket-dependent DIMM ranks. The early 1p Opty's did cross-over a bit with s939 though 2/4-ways were 940s (and required 2xx- or 8xx-series). They want to be like Intel - complete platforms - but are still hooked on Broadcom/nForce chipsets.

One forgotten aspect of the ATI merger always seems to be future AMD chipsets. Other than the 690 we are all still waiting.

nVidia also wants to be your platform provider - their chipset bidness has been growing 200% over the last few years but they may end up kinda stuck in the middle.

AMD is committing support for socketF until at least 2009 but it's the same cpu socket-wise:
2-/4-way = 2xxx-/8xxx-series. The big upcoming change is HT3 but they say it's backward compatible.

Intel has committed to s775 - not so sure about s771 beyond a year or so because of CSI. They just won't 'abandon' s771 however because normally folks look out for their enterprise platforms.

'Desktop' Phenom FX Quad will be socketF -> HT3 capable, I think. I imagine s775 will roll on until CSI moves down to the desktop.

Thank you for the opportunity of not really answering your question!