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Differences What are the advantages of each

Front view of Intel Xeon E7-4850

Reasons to consider the
Intel Xeon E7-4850

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Supports more RAM 2,097,152 MB vs 393,216 MB Supports more than 5.2x more RAM
Much more l3 cache 24 MB vs 15 MB 60% more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l2 cache 3 MB vs 2 MB 50% more l2 cache; more data can be stored in the l2 cache for quick access later
More threads 20 vs 12 8 more threads
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Front view of Intel Xeon E5-2620

Reasons to consider the
Intel Xeon E5-2620

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Significantly lower typical power consumption 77.19W vs 105.63W More than 25% lower typical power consumption
Higher turbo clock speed 2.5 GHz vs 2.4 GHz Around 5% higher turbo clock speed
Better overclocked clock speed (Air) 2.28 GHz vs 2.09 GHz Around 10% better overclocked clock speed (Air)
Significantly lower annual commercial energy cost 83.22 $/year vs 113.88 $/year More than 25% lower annual commercial energy cost
Significantly lower annual home energy cost 22.89 $/year vs 31.32 $/year More than 25% lower annual home energy cost
Slightly more l2 cache per core 0.33 MB/core vs 0.3 MB/core More than 10% more l2 cache per core
Newer Mar, 2012 vs Apr, 2011 Release date 11 months later

Features Key features of the Xeon E7-4850  vs E5-2620 

clock speed

turbo clock speed

Xeon E7-4850
2.4 GHz
Xeon E5-2620
2.5 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E7-4850
2.09 GHz
Xeon E5-2620
2.28 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E7-4850  vs
E5-2620 
Clock speed 2 GHz 2 GHz
Turbo clock speed 2.4 GHz 2.5 GHz
Cores Deca core Hexa core
Socket type
LGA 1567
LGA 2011

features

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

power consumption

TDP 130W 95W
Annual home energy cost 31.32 $/year 22.89 $/year
Annual commercial energy cost 113.88 $/year 83.22 $/year
Typical power consumption 105.63W 77.19W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR3-800
DDR
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 42,666.64 MB/s
Maximum memory size 2,097,152 MB 393,216 MB

details

Xeon E7-4850  vs
E5-2620 
Architecture x86-64 x86-64
Threads 20 12
L2 cache 3 MB 2 MB
L2 cache per core 0.3 MB/core 0.33 MB/core
L3 cache 24 MB 15 MB
L3 cache per core 2.4 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 4 2
Clock multiplier 15 25
Operating temperature Unknown - 69°C Unknown - 77.4°C

overclocking

Overclocked clock speed 2.09 GHz 2.28 GHz
Overclocked clock speed (Water) 2 GHz 2 GHz
Overclocked clock speed (Air) 2.09 GHz 2.28 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 1 2
Data rate 25,600 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 E7-4850
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Intel Xeon E5-2620
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