CPUBoss Review Our evaluation of X3440 vs 920 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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VS

Differences What are the advantages of each

Front view of Intel Xeon X3440

Reasons to consider the
Intel Xeon X3440

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Much lower typical power consumption 77.19W vs 135.63W Around 45% lower typical power consumption
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much lower annual home energy cost 22.89 $/year vs 48.38 $/year 2.1x lower annual home energy cost
Much lower annual commercial energy cost 83.22 $/year vs 134.55 $/year Around 40% lower annual commercial energy cost
Better performance per dollar 0.71 pt/$ vs 0.61 pt/$ More than 15% better performance per dollar
Higher Maximum operating temperature 72.7 °C vs 67.9 °C More than 5% higher Maximum operating temperature
Newer Sep, 2009 vs Oct, 2008 Release date 11 months later
Front view of Intel Core i7 920

Reasons to consider the
Intel Core i7 920

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Better geekbench 3 single core score 1,959 vs 1,726 Around 15% better geekbench 3 single core score
Better overclocked clock speed (Air) 4.22 GHz vs 3.84 GHz Around 10% better overclocked clock speed (Air)

Benchmarks Real world tests of Xeon X3440 vs Core i7 920

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon X3440
6,898
Core i7 920
7,014

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon X3440
1,726
Core i7 920
1,959

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon X3440
108,800 MB/s
Core i7 920
143,700 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon X3440
6,463
Core i7 920
7,125

GeekBench (64-bit) Data courtesy Primate Labs

Xeon X3440
9,536
Core i7 920
7,791

GeekBench

Xeon X3440
9,536
Core i7 920
9,242

PassMark Data courtesy Passmark

Xeon X3440
4,559
Core i7 920
4,958

PassMark (Single Core)

Xeon X3440
1,036
Core i7 920
1,164

Reviews Word on the street

Specifications Full list of technical specs

summary

Xeon X3440  vs
Core i7 920 
Clock speed 2.53 GHz 2.66 GHz
Turbo clock speed 2.93 GHz 2.93 GHz
Cores Quad core Quad core
Socket type
LGA 1156
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing Yes 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

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 DMI QPI
Number of links 1 1
Transfer rate 2,500 MT/s 4,800 MT/s

details

Xeon X3440  vs
Core i7 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 774,000,000 731,000,000
Max CPUs 1 1
Clock multiplier 19 20
Voltage range 0.65 - 1.4V 0.8 - 1.38V
Operating temperature Unknown - 72.7°C Unknown - 67.9°C

overclocking

Overclock popularity 5 491
Overclock review score 5 4.5
Overclocked clock speed 3.84 GHz 4.22 GHz
Overclocked clock speed (Water) 4.2 GHz 4.24 GHz
Overclocked clock speed (Air) 3.84 GHz 4.22 GHz

power consumption

TDP 95W 130W
Annual home energy cost 22.89 $/year 48.38 $/year
Annual commercial energy cost 83.22 $/year 134.55 $/year
Performance per watt 1.72 pt/W 1.21 pt/W
Typical power consumption 77.19W 135.63W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Dual Channel Triple Channel
Supports ECC Yes No
Maximum bandwidth 21,333.32 MB/s 25,599.99 MB/s
Intel Xeon X3440
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Intel Core i7 920
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