nehalem's body and inprovement
http://en.wikipedia.org/wiki/Nehalem_(CPU_architecture)
1 through 8 (or more) cores.
Integrated memory controllers supporting DDR3 SDRAM and between 1 and 4 memory channels.
Manufactured using the same 45 nm manufacturing process as its predecessor, Penryn.
Some variants will have an integrated graphics processor (IGP) located off-die, but in the same CPU package.[6]
Some (if not all) variants will utilize the new point-to-point processor interconnect, the Intel QuickPath Interconnect, replacing the legacy front side bus.
HyperThreading, which has not been present on a consumer Intel processor since 2006 with the Pentium 4 and Pentium XE.
Native (monolithic, i.e. all processor cores on a single die) quad and octo (8) core processors.[7]
731 million transistors for the quad core variant.
32 KB L1 instruction and 32 KB L1 data cache per core.
256 KB L2 cache per core.
8 MB (in the quad core version) L3 cache shared by all CPU cores.
33% more in-flight micro-ops than Core.[8]
2nd level branch predictor and 2nd level Translation Lookaside Buffer.[8]
Modular blocks of components such as cores that can be added and subtracted for varying market segments
