Selection between C2D and Xeon 3000 for PETSc Sparse solvers

[amjad ali]

 Hello,

Please help me out in selecting any one choice of the following:
 (Currently I am making a gigabit ethernet cluster of 4 compute nodes
(totaling 8 cores), with each node having)

(Choice 1)
One Processor: Intel Core2Duo E6750 2.66 GHz Processor, FSB 1333MHz, 4MB L2.
Motherboard: Intel Entry Server Board Intel S3200SHV with intel 3200 Chipset
supporting 1333/1066/800 MHz FSB .
RAM: 2GB DDR2 800MHz ECC System Memory.

(Choice 2)
One Processor: Intel Xeon 3075 2.66 GHz FSB1333 4MBL2.
 Motherboard: Intel Entry Server Board Intel S3200SHV with intel 3200
Chipset supporting 1333/1066/800 MHz FSB .
RAM: 2GB DDR2 800MHz ECC System Memory.

Which one system has larger memory-bandwidth/CPU-core?
Any other comment/remark?
My area work deals in sparse matrices.
I near future I would like to add 12 similar compute nodes in the cluster.

with best regards,
Amjad Ali.
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