CPU Guide

A Stepping Ahead - The Core i7-975 Extreme Edition and i7-950

A Stepping Ahead - The Core i7-975 Extreme Edition and i7-950



Quad-Core Processors Compared

Quad-Core Processors Compared

With the addition of these new Core i7 processors, we have updated our summary of all current quad-core processors that are available in the market. This may also be the last time that we'll be seeing the Core i7-965 Extreme Edition and the i7-940.

Processor Name Core i7 AMD Phenom II X4 (AM3) AMD Phenom II X4 (AM2+) Core 2 Quad (45nm)
Processor Model i7-975 Extreme Edition, i7-965 Extreme Edition, i7-950, i7-940, i7-920 955 'Black Edition', 945, 910, 810, 805 940 'Black Edition', 920 QX9775, Q9650, Q9550, Q9400, Q9300
Processor Frequency 3.3GHz, 3.2GHz, 3.06GHz, 2.93GHz, 2.66GHz 3.2GHz, 3.0GHz, 2.6GHz, 2.6GHz, 2.5GHz 3.0GHz, 2.8GHz 2.5GHz - 3.2GHz
No. of Cores 4 4 4 4
Front Side Bus (MHz) - - - 1333
HyperTransport Bus / QuickPath Interconnect 6.4GT/sec for i7-975 XE, i7-965 XE, 4.8GT/sec for i7-950, i7-940, i7-920 2.0GHz 1.8GHz -
L1 Cache (data + instruction) (32KB + 32KB) x 4 (64KB + 64KB) x 4 (64KB + 64KB) x 4 (32KB + 32KB) x 4
L2 Cache 256KB x 4 512KB x 4 512KB x 4 6MB x 2, 3MB x 2 (Q9300 & Q9400 only)
L3 Cache 8MB 6MB for 900 series 4MB for 800 series 6MB -
Memory Controller Integrated Triple Channel (up to DDR3-1066) Integrated Dual Channel (up to DDR2-1066 or DDR3-1333) Integrated Dual Channel (up to DDR2-1066) External - Chipset Dependent
TDP (W) 130W 125W for 900 series 95W for 800 series 125W 125W for QX9775 95W for all others
Instruction Set Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2 MMX, SSE, SSE2, SSE3, SSE4a MMX, SSE, SSE2, SSE3, SSE4a MMX, SSE, SSE2, SSE3, SSSE3, SSSE4.1
Execute Disable Bit Yes Yes Yes Yes
Intel EM64T / AMD64 Yes Yes Yes Yes
Enhanced Intel SpeedStep Technology (EIST) / AMD Cool 'n' Quiet Yes Yes Yes Yes
Virtualization Technology Yes (Enhanced) Yes Yes Yes (Enhanced)
Packaging LGA1366 AM3 AM2+ LGA775
Process Technology 45nm 45nm SOI 45nm SOI 45nm
Processor Codename Bloomfield Deneb Deneb Yorkfield
Die Size 263mm² 258mm² 258mm² 214mm²
No. of Transistors 731 million 758 million 758 million 820 million