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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 GHz Around 35% higher clock speed
Much higher turbo clock speed 3.06 GHz vs 2.27 GHz Around 35% higher turbo clock speed
Much higher Maximum operating temperature 81.3 °C vs 64 °C More than 25% higher Maximum operating temperature
Lower typical power consumption 77.19W vs 85.31W Around 10% lower typical power consumption
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Lower annual commercial energy cost 83.22 $/year vs 91.98 $/year Around 10% lower annual commercial energy cost
Lower annual home energy cost 22.89 $/year vs 25.29 $/year Around 10% lower annual home energy cost
Front view of Intel Xeon E7-2820

Reasons to consider the
Intel Xeon E7-2820

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Much more l3 cache 18 MB vs 12 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Supports more RAM 1,048,576 MB vs 294,912 MB Supports more than 3.5x more RAM
More threads 16 vs 12 4 more threads
More l3 cache per core 2.25 MB/core vs 2 MB/core Around 15% more l3 cache per core
Newer Apr, 2011 vs Mar, 2010 Release date over 1 years later

Features Key features of the Xeon X5650  vs E7-2820 

clock speed

Xeon X5650
2.66 GHz
Xeon E7-2820
2 GHz

turbo clock speed

Xeon X5650
3.06 GHz
Xeon E7-2820
2.27 GHz

L2 cache

L3 cache

Xeon X5650
12 MB
Xeon E7-2820
18 MB

TDP

Specifications Full list of technical specs

summary

Xeon X5650  vs
E7-2820 
Clock speed 2.66 GHz 2 GHz
Turbo clock speed 3.06 GHz 2.27 GHz
Cores Hexa core Octa core
Socket type
LGA 1366
LGA 1567

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 105W
Annual home energy cost 22.89 $/year 25.29 $/year
Annual commercial energy cost 83.22 $/year 91.98 $/year
Typical power consumption 77.19W 85.31W

bus

Architecture QPI QPI
Number of links 2 1
Data rate 51,200 MB/s 23,464 MB/s
Transfer rate 6,400 MT/s 5,860 MT/s
Clock speed 3,200 MHz 2,930 MHz

details

Xeon X5650  vs
E7-2820 
Architecture x86-64 x86-64
Threads 12 16
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 18 MB
L3 cache per core 2 MB/core 2.25 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Clock multiplier 20 15
Operating temperature Unknown - 81.3°C Unknown - 64°C

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
DDR3-1333
DDR3-1066
DDR3
DDR3-800
DDR
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 25,600 MB/s
Maximum memory size 294,912 MB 1,048,576 MB
Intel Xeon X5650
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Intel Xeon E7-2820
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