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Intel Xeon X5650

Front view of Intel Xeon X5650
Front view of Intel Xeon L5640

Intel Xeon L5640

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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 higher clock speed 2.66 GHz vs 2.26 GHz Around 20% higher clock speed
Much better performance per dollar 1.44 pt/$ vs 0.63 pt/$ More than 2.2x better performance per dollar
Much higher Maximum operating temperature 81.3 °C vs 69.4 °C More than 15% higher Maximum operating temperature
Higher turbo clock speed 3.06 GHz vs 2.8 GHz Around 10% higher turbo clock speed
Much better overclocked clock speed (Water) 4.64 GHz vs 2.27 GHz More than 2x better overclocked clock speed (Water)
Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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Significantly lower typical power consumption 48.75W vs 77.19W More than 35% lower typical power consumption
Better overclocked clock speed (Air) 3.9 GHz vs 3.84 GHz Almost the same
Significantly lower annual commercial energy cost 52.56 $/year vs 83.22 $/year More than 35% lower annual commercial energy cost
Significantly lower annual home energy cost 14.45 $/year vs 22.89 $/year More than 35% lower annual home energy cost

Benchmarks Real world tests of Xeon X5650 vs L5640

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon X5650
22,313
Xeon L5640
16,852

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon X5650
2,176
Xeon L5640
1,918

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon X5650
1,470,000 MB/s
Xeon L5640
1,250,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon X5650
13,247
Xeon L5640
11,047

GeekBench

Xeon X5650
14,009
Xeon L5640
11,047

PassMark Data courtesy Passmark

Xeon X5650
7,510
Xeon L5640
6,451

PassMark (Single Core)

Xeon X5650
1,234
Xeon L5640
1,100

Specifications Full list of technical specs

summary

 Xeon X5650  vs
L5640 
Clock speed 2.66 GHz 2.26 GHz
Turbo clock speed 3.06 GHz 2.8 GHz
Cores Hexa core Hexa core
Socket type
LGA 1366

features
Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption
TDP 95W 60W
Annual home energy cost 22.89 $/year 14.45 $/year
Annual commercial energy cost 83.22 $/year 52.56 $/year
Performance per watt 7.89 pt/W 10.46 pt/W
Typical power consumption 77.19W 48.75W

memory controller
Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 31,999.98 MB/s
Maximum memory size 294,912 MB 294,912 MB

details

 Xeon X5650  vs
L5640 
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 12 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Clock multiplier 20 17
Voltage range 0.75 - 1.35V 0.75 - 1.35V
Operating temperature Unknown - 81.3°C Unknown - 69.4°C

overclocking
Overclocked clock speed 3.84 GHz 3.9 GHz
Overclocked clock speed (Water) 4.64 GHz 2.27 GHz
Overclocked clock speed (Air) 3.84 GHz 3.9 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 QPI QPI
Number of links 2 2
Data rate 51,200 MB/s 46,928 MB/s
Transfer rate 6,400 MT/s 5,860 MT/s
Clock speed 3,200 MHz 2,930 MHz
Intel Xeon X5650
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Intel Xeon L5640
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