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Differences What are the advantages of each

Front view of Intel Xeon E3-1245

Reasons to consider the
Intel Xeon E3-1245

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Much better performance per watt 10.8 pt/W vs 2.17 pt/W Around 5x better performance per watt
Much better performance per dollar 3.76 pt/$ vs 0.66 pt/$ Around 5.8x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Front view of Intel Xeon E3-1240

Reasons to consider the
Intel Xeon E3-1240

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Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 22.89 $/year More than 15% lower annual home energy cost
Better overclocked clock speed (Water) 3.4 GHz vs 3.3 GHz Around 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E3-1245 vs E3-1240

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E3-1245
10,740
Xeon E3-1240
3,180

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E3-1245
2,410,000 MB/s
Xeon E3-1240
4,280 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E3-1245
10,961
Xeon E3-1240
12,939

GeekBench

Xeon E3-1245
10,961
Xeon E3-1240
13,381

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1245  vs
E3-1240 
Clock speed 3.3 GHz 3.3 GHz
Turbo clock speed 3.7 GHz 3.7 GHz
Cores Quad core Quad core
Socket type
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 95W 80W
Annual home energy cost 22.89 $/year 19.27 $/year
Annual commercial energy cost 83.22 $/year 70.08 $/year
Performance per watt 10.8 pt/W 2.17 pt/W
Typical power consumption 77.19W 65W

bus

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

details

Xeon E3-1245  vs
E3-1240 
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 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 33 33
Operating temperature Unknown - 72.6°C Unknown - 69.1°C

overclocking

Overclock popularity 1 10
Overclocked clock speed 3.71 GHz 3.71 GHz
Overclocked clock speed (Water) 3.3 GHz 3.4 GHz
Overclocked clock speed (Air) 3.71 GHz 3.71 GHz

integrated graphics

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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 21,333.32 MB/s 21,333.32 MB/s
Maximum memory size 32,768 MB 32,768 MB
Intel Xeon E3-1245
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Intel Xeon E3-1240
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