CPUBoss Review Our evaluation of 975 vs 920

Performance

Benchmark performance using all cores

3DMark06 (CPU), Cinebench R11.5, Cinebench R10 32-bit, Passmark and 2 more

Single-core Performance

Individual core benchmark performance

Cinebench R11.5 (1-core), Cinebench R10 32-bit (1-core) and 1 more

Overclocking

How much speed can you get out of the processor?

Unlocked, Maximum Overclocked Clock Speed (Air) and 2 more

Value

Are you paying a premium for performance?

Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Overclocking and Value

Winner
Intel Core i7 975 

CPUBoss recommends the Intel Core i7 975  based on its performance.

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VS

Intel Core i7 975

CPUBoss Winner
Front view of Intel Core i7 975

Differences What are the advantages of each

Front view of Intel Core i7 975

Reasons to consider the
Intel Core i7 975

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Significantly higher turbo clock speed 3.6 GHz vs 2.93 GHz Around 25% higher turbo clock speed
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Higher clock speed 3.33 GHz vs 2.66 GHz More than 25% higher clock speed
Much better SysMark 2007 video creation score 282 vs 242 More than 15% better SysMark 2007 video creation score
Significantly better cinebench r11.5 (1-core) score 1.23 vs 0.98 More than 25% better cinebench r11.5 (1-core) score
Better PassMark (Single core) score 1,459 vs 1,158 More than 25% better PassMark (Single core) score
Better 3DMark06 CPU score 5,836.5 vs 4,727.5 Around 25% better 3DMark06 CPU score
Better cinebench r11.5 score 5.98 vs 4.79 Around 25% better cinebench r11.5 score
Better PassMark score 6,276 vs 4,994 More than 25% better PassMark score
Better 3DMark11 physics score 6,880 vs 5,590 Around 25% better 3DMark11 physics score
Better geekbench (64-bit) score 9,894 vs 7,791 More than 25% better geekbench (64-bit) score
Slightly better overclocked clock speed (Air) 4.47 GHz vs 4.23 GHz More than 5% better overclocked clock speed (Air)
Newer Jun, 2009 vs Oct, 2008 Release date 8 months later
Front view of Intel Core i7 920

Reasons to consider the
Intel Core i7 920

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Much lower typical power consumption 135.63W vs 212W More than 35% lower typical power consumption
Much better performance per dollar 11.74 pt/$ vs 2.07 pt/$ Around 5.8x better performance per dollar
Much lower annual home energy cost 48.38 $/year vs 82.69 $/year More than 40% lower annual home energy cost
Much lower annual commercial energy cost 134.55 $/year vs 211.12 $/year More than 35% lower annual commercial energy cost
Better overclocked clock speed (Water) 3.94 GHz vs 3.33 GHz Around 20% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i7 975 vs 920

GeekBench (32-bit)

Core i7 975
9,229
Core i7 920
7,125

3D Mark 11 (Physics)

Core i7 975
6,880
Core i7 920
5,590

Cinebench R11.5

Cinebench R11.5 (Single Core)

sysmark 2007 (overall)

Passmark

Core i7 975
6,276
Core i7 920
4,994

Specifications Full list of technical specs

summary

Core i7 975  vs
920 
Clock speed 3.33 GHz 2.66 GHz
Turbo clock speed 3.6 GHz 2.93 GHz
Cores Quad core Quad core
Socket type
LGA 1366
Is unlocked Yes No
Is hyperthreaded Yes Yes

features

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

power consumption

TDP 130W 130W
Annual home energy cost 82.69 $/year 48.38 $/year
Annual commercial energy cost 211.12 $/year 134.55 $/year
Performance per watt 3.21 pt/W 4.12 pt/W
Idle power consumption 154W 81.7W
Peak power consumption 241W 153.6W
Typical power consumption 212W 135.63W

bus

Architecture QPI QPI
Number of links 1 1
Data rate 25,600 MB/s 19,200 MB/s
Transfer rate 6,400 MT/s 4,800 MT/s
Clock speed 3,200 MHz 2,400 MHz

details

Core i7 975  vs
920 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 45 nm
Transistor count 731,000,000 731,000,000
Max CPUs 1 1
Clock multiplier 25 20
Voltage range 0.8 - 1.38V 0.8 - 1.38V
Operating temperature 5 - 67.9°C Unknown - 67.9°C

overclocking

Overclock popularity 8 491
Overclocked clock speed 4.47 GHz 4.23 GHz
Overclocked clock speed (Water) 3.33 GHz 3.94 GHz
Overclocked clock speed (Air) 4.47 GHz 4.23 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC No No
Maximum bandwidth 25,599.99 MB/s 25,599.99 MB/s
Intel Core i7 975
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Intel Core i7 920
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