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Differences What are the advantages of each

Front view of Intel Xeon E5-1620

Reasons to consider the
Intel Xeon E5-1620

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Much higher clock speed 3.6 GHz vs 3.3 GHz Around 10% higher clock speed
Supports more RAM 384,000 MB vs 32,768 MB Supports around 11.8x more RAM
More l3 cache 10 MB vs 8 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
Higher turbo clock speed 3.8 GHz vs 3.7 GHz Around 5% higher turbo clock speed
Much better overclocked clock speed (Water) 4.7 GHz vs 3.3 GHz More than 40% better overclocked clock speed (Water)
Significantly better overclocked clock speed (Air) 3.93 GHz vs 3.71 GHz More than 5% better overclocked clock speed (Air)
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Newer Mar, 2012 vs Apr, 2011 Release date 11 months later
Front view of Intel Xeon E3-1245

Reasons to consider the
Intel Xeon E3-1245

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Significantly lower typical power consumption 77.19W vs 105.63W More than 25% lower typical power consumption
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

Benchmarks Real world tests of Xeon E5-1620 vs E3-1245

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-1620
12,397
Xeon E3-1245
10,740

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-1620
2,460,000 MB/s
Xeon E3-1245
2,410,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5-1620
13,003
Xeon E3-1245
10,961

GeekBench

Xeon E5-1620
13,786
Xeon E3-1245
10,961

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-1620  vs
E3-1245 
Clock speed 3.6 GHz 3.3 GHz
Turbo clock speed 3.8 GHz 3.7 GHz
Cores Quad core Quad core
Socket type
LGA 2011
LGA 1155

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
Performance per watt 7.47 pt/W 10.8 pt/W
Typical power consumption 105.63W 77.19W

bus

Architecture QPI DMI
Number of links 0 1
Transfer rate 0 MT/s 5,000 MT/s

details

Xeon E5-1620  vs
E3-1245 
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 10 MB 8 MB
L3 cache per core 2.5 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 38 33
Operating temperature Unknown - 64°C Unknown - 72.6°C

overclocking

Overclocked clock speed 3.93 GHz 3.71 GHz
Overclocked clock speed (Water) 4.7 GHz 3.3 GHz
Overclocked clock speed (Air) 3.93 GHz 3.71 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics P3000
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,350 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 21,333.32 MB/s
Maximum memory size 384,000 MB 32,768 MB
Intel Xeon E5-1620
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Intel Xeon E3-1245
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