Which CPU would be better for Containers?

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I'm looking to buy a new server, but I'm wondering what CPU type will work best for containers running on Proxmox.

Thanks

Intel® Xeon® Processor X3220 (8M Cache, 2.40 GHz, 1066 MHz FSB)
Intel® Xeon® Processor E5310 (8M Cache, 1.60 GHz, 1066 MHz FSB)
Intel® Xeon® Processor E3110 (6M Cache, 3.00 GHz, 1333 MHz FSB)

 

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If I had the choice I would go for the:

Intel® Xeon® Processor X3220 (8M Cache, 2.40 GHz, 1066 MHz FSB)
http://ark.intel.com/Product.aspx?id=34694

Pros:
- Xeon Server-Class
- Quad-Core
- Intel VT-x (for KVM guests)

Cons:
- "only" 1000MHz FSB

You could also go for a Intel Nehalem-CPU. They're worth the price I think and you have got more bandwith (QPI).