Intel Xeon W3520 andE5520-Which one is better ?

[hvun1979]

Dear all,

I want to build up my new system, a Dual Quadcore CPU system , and can you tell me which one below is better :
1/ Intel Xeon W3520 Bloomfield 2.66GHz - 309$
2/ Intel Xeon E5520 Nehalem 2.26GHz -390$
3/ Intel Xeon E5530 Nehalem 2.4GHz - 570$

Why the price is quite different like that ?
Thanks for your advice

 

[enzo matrix]

#2 and #3 have a much lower TDP (80W) than the first one (130W). So they will run cooler and use less power, but not perform better.
Number 1 is also uniprocessor. It won't be able to be paired with a second one. The bus speed on it is also lower. It also only supports up to 24GB of ram as opposed to the other two that support up to 144GB. Number 1 also only supports tri-channel memory. the second two support 6-channel memory. It's thermal tolerance is also only 68C while the other two are fine until 76C.

 

[r_manic]

Best answer selected by r_manic.