Is this CPU an upgrade?

[Alec Shern]

If so how much of one?
Old: Intel pentium dual core E2220
2.40 GHz
1MB
/800(assuming MHz)

New: Intel core 2 quad Q8400
2.66 GHz
4MB
/1333(MHz?)

 

[adamsunderwood]

I would estimate around a 150% to 200% performance increase in multi-threaded computation and probably about a 33% performance increase in single-threaded.