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Differences What are the advantages of each

Front view of Intel Xeon E5540

Reasons to consider the
Intel Xeon E5540

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Significantly lower typical power consumption 65W vs 93.6W More than 30% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 8 vs 4 Twice as many threads
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Supports more RAM 147,456 MB vs 32,768 MB Supports 4.5x more RAM
Significantly lower annual home energy cost 19.27 $/year vs 27.75 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 70.08 $/year vs 100.92 $/year More than 30% lower annual commercial energy cost
Significantly better overclocked clock speed (Water) 4.45 GHz vs 3.51 GHz More than 25% better overclocked clock speed (Water)
Slightly higher Maximum operating temperature 76 °C vs 72.6 °C Around 5% higher Maximum operating temperature
Front view of Intel Core i5 2400

Reasons to consider the
Intel Core i5 2400

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Much better performance per dollar 4.58 pt/$ vs 0.23 pt/$ More than 19.8x better performance per dollar
Higher clock speed 3.1 GHz vs 2.53 GHz Around 25% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Higher turbo clock speed 3.4 GHz vs 2.8 GHz More than 20% higher turbo clock speed
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per watt 8.14 pt/W vs 2.24 pt/W Around 3.8x better performance per watt
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Better PassMark (Single core) score 1,742 vs 1,141 Around 55% better PassMark (Single core) score
Newer Jan, 2011 vs Mar, 2009 Release date over 1 years later
Slightly better PassMark score 5,901 vs 4,857 More than 20% better PassMark score

Benchmarks Real world tests of Xeon E5540 vs Core i5 2400

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5540
8,617
Core i5 2400
8,298

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5540
1,679
Core i5 2400
2,638

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5540
112,700 MB/s
Core i5 2400
2,260,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5540
7,362
Core i5 2400
8,258

GeekBench

Xeon E5540
8,085
Core i5 2400
10,769

PassMark Data courtesy Passmark

Xeon E5540
4,857
Core i5 2400
5,901

PassMark (Single Core)

Xeon E5540
1,141
Core i5 2400
1,742

Specifications Full list of technical specs

summary

Xeon E5540  vs
Core i5 2400 
Clock speed 2.53 GHz 3.1 GHz
Turbo clock speed 2.8 GHz 3.4 GHz
Cores Quad core Quad core
Socket type
LGA 1366
LGA 1155

features

Has a NX bit Yes Yes
Supports trusted computing No 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 80W 95W
Annual home energy cost 19.27 $/year 27.75 $/year
Annual commercial energy cost 70.08 $/year 100.92 $/year
Performance per watt 2.24 pt/W 8.14 pt/W
Typical power consumption 65W 93.6W

bus

Architecture QPI DMI
Number of links 2 1
Transfer rate 5,860 MT/s 5,000 MT/s

details

Xeon E5540  vs
Core i5 2400 
Architecture x86-64 x86-64
Threads 8 4
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 1
Clock multiplier 19 31
Operating temperature Unknown - 76°C Unknown - 72.6°C

overclocking

Overclock popularity 0 63
Overclocked clock speed 3.57 GHz 3.54 GHz
Overclocked clock speed (Water) 4.45 GHz 3.51 GHz
Overclocked clock speed (Air) 3.57 GHz 3.54 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 2000
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,100 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 25,599.99 MB/s 21,333.32 MB/s
Maximum memory size 147,456 MB 32,768 MB
Intel Xeon E5540
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Intel Core i5 2400
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