The new LGA 775 Xeon 3000 series Conroe processors should work on P965 and 975X chipset motherboards that have BIOS support for the new Core 2 processors. The Xeon 3070 2.66GHz, 3060 2.4GHz, 3050 2.13GHz and 3040 1.86GHz are virtually identical to the E6700, E6600, E6400 and E6300 Core 2s. The only differences I think is that the Xeon 3000s have different SIMD Integer Instruction and different SIMD Floating-Point Instructions than the Core 2s. So if you want to use something other than a new Core 2, you can use these new Xeons. And well, they just have a cooler name.

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The new LGA 775 Xeon 3000 series Conroe processors should work on P965 and 975X chipset motherboards that have BIOS support for the new Core 2 processors. The Xeon 3070 2.66GHz, 3060 2.4GHz, 3050 2.13GHz and 3040 1.86GHz are virtually identical to the E6700, E6600, E6400 and E6300 Core 2s. The only differences I think is that the Xeon 3000s have different SIMD Integer Instruction and different SIMD Floating-Point Instructions than the Core 2s. So if you want to use something other than a new Core 2, you can use these new Xeons. And well, they just have a cooler name.

They are not going to work. You have the FSB difference, and many details that will require an interposer.
Intruction set are fully similar between Core 2 CPUs

who?

The new LGA 775 Xeon 3000 series Conroe processors should work on P965 and 975X chipset motherboards that have BIOS support for the new Core 2 processors. The Xeon 3070 2.66GHz, 3060 2.4GHz, 3050 2.13GHz and 3040 1.86GHz are virtually identical to the E6700, E6600, E6400 and E6300 Core 2s. The only differences I think is that the Xeon 3000s have different SIMD Integer Instruction and different SIMD Floating-Point Instructions than the Core 2s. So if you want to use something other than a new Core 2, you can use these new Xeons. And well, they just have a cooler name.

I was under the impression that the pinouts are different. Core 2 = 775 pins; Xeon 3000 = 771 pins, each pin routed differently in the processor to a different signal.

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What is the differences between the 3xxx and 51xx Xeons? The latter are the ones powering the current server and Mac 4 way systems!

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It's good to be back amongst friends and colleagues

What is the differences between the 3xxx and 51xx Xeons? The latter are the ones powering the current server and Mac 4 way systems!

The 3xxx xeons have no multi-processor capability.

Regards Hans

P.S: Why the single socket xeons have 775 pins and the multi socket ones 771 is beyond me :o)

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AFAIK, Xeon 3xxx models are Core 2 dualcore chips with half the L2 cache of the 51xx models.

I don't know the Xeon family names, but their desktop equivalents would be "Allendale" (half cache) and "Conroe".

HTH,
Simon.

After some research, I've found some information that might be useful.

Apparently, the 3xxx series Xeons are marketed to single socket systems, like AMD's 1xx series Opterons, mainly for enthusiasts or single processor file servers. They are packaged in a 775 pin array, like the Core 2 Duo counterparts (they are based upon the same core). They sport a 1066MT/s FSB, so they will be fully compatible with existing Core 2 Duo motherboards. There is essentially no difference between a Xeon 3xxx series and a Core 2 Duo, except in price.

The 5xxx series Xeons are for multi-socket systems, intended for multi-CPU systems such as database and application servers. They are packaged in a 771 pin array which is incompatible with the Core 2 Duo's 775 pin socket. Some 5xxx series Xeons have a 1066MT/s FSB while others have a 1333MT/s FSB.

Both the Core 2 Duo series and the Xeon series support MMX, SSE, SSE2, SSE3, SSSE3, EM64T, XD bit (like AMD's NX bit) and Virtualization Technology.

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The new LGA 775 Xeon 3000 series Conroe processors should work on P965 and 975X chipset motherboards that have BIOS support for the new Core 2 processors. The Xeon 3070 2.66GHz, 3060 2.4GHz, 3050 2.13GHz and 3040 1.86GHz are virtually identical to the E6700, E6600, E6400 and E6300 Core 2s. The only differences I think is that the Xeon 3000s have different SIMD Integer Instruction and different SIMD Floating-Point Instructions than the Core 2s. So if you want to use something other than a new Core 2, you can use these new Xeons. And well, they just have a cooler name.

They are not going to work. You have the FSB difference, and many details that will require an interposer.
Intruction set are fully similar between Core 2 CPUs

who?

I've been trying to get more info on the Xeon 3000s today. Unless Intel has goofed up the specs, the FSB for the 3000 Xeons is 1066MHz, and the 5100s have 1333MHz.

Here's something interesting. Tyan has a single-socket 775 server board that supports Xeon 3000 and Core 2. The Tyan has a 3000 chipset and it uses ECC and non-ECC memory. That indicates that these chips are much alike.


(S5197)

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AFAIK, Xeon 3xxx models are Core 2 dualcore chips with half the L2 cache of the 51xx models.

I don't know the Xeon family names, but their desktop equivalents would be "Allendale" (half cache) and "Conroe".

HTH,
Simon.

That's true, all of the 5100 Xeons have 4MB L2. The Xeon 3040 and 3050 have 2MB L2. But The 3060 2.40GHz and 3070 2.66GHz have larger 4MB L2.

Maybe Intel changed the specs on the Xeon 3000s. I'm still trying to get concrete info about any possible differences with SIMD.

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