Core i7 CPU comes in three variants at three price points
* Core i7 920 at 284 USD (mainstream)
* Core i7 940 at 562 USD (performance)
* Core i7 965 Extreme at 999 USD (enthusiast)
Parallelism : 4 Physical Cores, 8 Logical Processors (hyper threaded)
Memory standard : Triple Channel DDR3
L2 Cache size : 256 KB per core
L3 Cache size : 8 MB
Transistor count : 731 Million
TDP : 130 W
Fabrication process : 45 nm
In any case even the moderately priced i7 920 gives you phenomenal performance gains of upto 50% compared to a quad core CPU so if you are upgrading and want a economical option don't think go for it.
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