That is the catch
Since Intel's Lynnfield can run up to eight cores in
Hyperthreading, Intel has figured out how to distinguish Lynnfield Core i7
branded SKUs from Core i5.
The logic is very simple. Core i7 has four cores and eight threads
enabled, while Core i5 has four cores and four threads enabled.
They both need discrete graphics as Intel 5 series chipset don’t
have any IGP as IGP is now part of Clarkdale CPU. However some desktop
Clarkdale IGP CPU with 32nm dual-core and four threads inside will end up with
Core i5 brand, just to make things a bit more complicated.
All of these CPUs will need a P55 chipset at beginning until
the other chipsets from 5 series come along.
