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Differences What are the advantages of each

Front view of Intel Pentium D 945

Reasons to consider the
Intel Pentium D 945

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CPUBoss is not aware of any important advantages of the Pentium D 945 vs the Core i7 975.

Front view of Intel Core i7 975

Reasons to consider the
Intel Core i7 975

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines

Benchmarks Real world tests of Pentium D 945 vs Core i7 975

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Pentium D 945
122,800 MB/s
Core i7 975
152,250 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

Core i7 975
11,512

Specifications Full list of technical specs

summary

Pentium D 945  vs
Core i7 975 
Clock speed 3.4 GHz 3.33 GHz
Cores Dual core Quad core
Socket type
LGA 775
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support No Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 130W
Annual home energy cost 22.89 $/year 82.69 $/year
Annual commercial energy cost 83.22 $/year 211.12 $/year
Performance per watt 1.14 pt/W 0.93 pt/W
Typical power consumption 77.19W 212W

memory controller

Memory controller Built-in Built-in
Supports ECC No No

details

Pentium D 945  vs
Core i7 975 
Architecture x86-64 x86-64
Threads 2 8
L2 cache 4 MB 1 MB
L2 cache per core 2 MB/core 0.25 MB/core
Manufacture process 65 nm 45 nm
Transistor count 376,000,000 731,000,000
Max CPUs 1 1
Clock multiplier 17 25
Voltage range 1.2 - 1.34V 0.8 - 1.38V
Operating temperature Unknown - 63.4°C 5 - 67.9°C

overclocking

Overclock popularity 9 8
Overclocked clock speed 4.22 GHz 4.46 GHz
Overclocked clock speed (Water) 4.59 GHz 4.45 GHz
Overclocked clock speed (Air) 4.22 GHz 4.46 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture FSB QPI
Number of links 1 1
Clock speed 800 MHz 3,200 MHz
Intel Pentium D 945
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Intel Core i7 975
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