CPUBoss Review Our evaluation of X5650 vs E5-2640


Benchmark performance using all cores

Passmark and GeekBench (32-bit)

Single-core Performance

Individual core benchmark performance

Passmark (Single Core)

Cost to Run

Commercial Energy Cost


Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Cost to Run and Value

Intel Xeon E5-2640 

CPUBoss recommends the Intel Xeon E5-2640  based on its .

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Front view of Intel Xeon E5-2640

Intel Xeon E5-2640

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Xeon X5650

Reasons to consider the
Intel Xeon X5650

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Much better performance per dollar 14.71 pt/$ vs 1.94 pt/$ More than 7.5x better performance per dollar
Slightly higher clock speed 2.66 GHz vs 2.5 GHz More than 5% higher clock speed
Better overclocked clock speed (Air) 3.45 GHz vs 2.8 GHz Around 25% better overclocked clock speed (Air)
Higher Maximum Operating Temperature 81.3 °C vs 73 °C More than 10% higher Maximum Operating Temperature
Much better overclocked clock speed (Water) 4.44 GHz vs 2.5 GHz More than 75% better overclocked clock speed (Water)
Front view of Intel Xeon E5-2640

Reasons to consider the
Intel Xeon E5-2640

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Significantly better PassMark (Single core) score 2,020 vs 1,232 Around 65% better PassMark (Single core) score
Slightly more l3 cache 15 MB vs 12 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Newer Mar, 2012 vs Mar, 2010 Release date over 2 years later
Better PassMark score 9,708 vs 7,606 Around 30% better PassMark score
Better performance per watt 15.61 pt/W vs 12.23 pt/W Around 30% better performance per watt

Benchmarks Real world tests of Xeon X5650 vs E5-2640

GeekBench (32-bit)

Xeon X5650
Xeon E5-2640


Xeon X5650
Xeon E5-2640

Passmark (Single Core)

Xeon X5650
Xeon E5-2640

Specifications Full list of technical specs


Xeon X5650  vs
Clock speed 2.66 GHz 2.5 GHz
Turbo clock speed 3.06 GHz 3 GHz
Cores Hexa core Hexa core
Socket type
LGA 1366
LGA 2011
Is hyperthreaded Yes Yes


Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 95W
Annual home energy cost 22.89 $/year 22.89 $/year
Annual commercial energy cost 83.22 $/year 83.22 $/year
Performance per watt 12.23 pt/W 15.61 pt/W
Typical power consumption 77.19W 77.19W

memory controller

Memory controller Built-in Built-in
Memory type
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 42,666.64 MB/s
Maximum memory size 294,912 MB 393,216 MB


Xeon X5650  vs
Architecture x86-64 x86-64
Threads 12 12
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 0.33 MB/core
L3 cache 12 MB 15 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Clock multiplier 20 30
Voltage range 0.75 - 1.35V 0.6 - 1.35V
Operating temperature Unknown - 81.3°C Unknown - 73°C


Overclock popularity 11 3
Overclocked clock speed 3.45 GHz 2.8 GHz
Overclocked clock speed (Water) 4.44 GHz 2.5 GHz
Overclocked clock speed (Air) 3.45 GHz 2.8 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


Architecture QPI QPI
Number of links 2 2
Data rate 51,200 MB/s 57,600 MB/s
Transfer rate 6,400 MT/s 7,200 MT/s
Clock speed 3,200 MHz 3,600 MHz
Intel Xeon X5650
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Intel Xeon E5-2640
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