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Intel Xeon E5 2648L v2

Front view of Intel Xeon E5 2648L v2
Front view of Intel Xeon E5 2640 v2

Intel Xeon E5 2640 v2

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Differences What are the advantages of each

Front view of Intel Xeon E5 2648L v2

Reasons to consider the
Intel Xeon E5 2648L v2

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Much more l3 cache 25 MB vs 20 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
Much higher Maximum operating temperature 92 °C vs 75 °C Around 25% higher Maximum operating temperature
More l2 cache 2.5 MB vs 2 MB 25% more l2 cache; more data can be stored in the l2 cache for quick access later
More threads 20 vs 16 4 more threads
Lower typical power consumption 56.88W vs 77.19W More than 25% lower typical power consumption
Lower annual commercial energy cost 61.32 $/year vs 83.22 $/year More than 25% lower annual commercial energy cost
Lower annual home energy cost 16.86 $/year vs 22.89 $/year More than 25% lower annual home energy cost
Front view of Intel Xeon E5 2640 v2

Reasons to consider the
Intel Xeon E5 2640 v2

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Higher clock speed 2 GHz vs 1.9 GHz More than 5% higher clock speed
Much better overclocked clock speed (Air) 2.55 GHz vs 1.9 GHz Around 35% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 2 GHz vs 1.9 GHz More than 5% better overclocked clock speed (Water)

Features Key features of the Xeon E5 2648L v2  vs 2640 v2 

clock speed

Xeon E5 2648L v2
1.9 GHz
Xeon E5 2640 v2
2 GHz

turbo clock speed

Xeon E5 2648L v2
2.5 GHz
Xeon E5 2640 v2
2.5 GHz

L2 cache

Xeon E5 2648L v2
2.5 MB
Xeon E5 2640 v2
2 MB

L3 cache

Xeon E5 2648L v2
25 MB
Xeon E5 2640 v2
20 MB

overclocked clock speed (air)

Xeon E5 2648L v2
1.9 GHz
Xeon E5 2640 v2
2.55 GHz

overclocked clock speed (water)

Xeon E5 2648L v2
1.9 GHz
Xeon E5 2640 v2
2 GHz

Specifications Full list of technical specs

summary

 Xeon E5 2648L v2  vs
2640 v2 
Clock speed 1.9 GHz 2 GHz
Turbo clock speed 2.5 GHz 2.5 GHz
Cores Deca core Octa core
Socket type
LGA 2011
Is unlocked No No

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 70W 95W
Annual home energy cost 16.86 $/year 22.89 $/year
Annual commercial energy cost 61.32 $/year 83.22 $/year
Typical power consumption 56.88W 77.19W

bus
Architecture QPI QPI
Number of links 2 2
Data rate 64,000 MB/s 57,600 MB/s
Transfer rate 8,000 MT/s 7,200 MT/s
Clock speed 4,000 MHz 3,600 MHz

details

 Xeon E5 2648L v2  vs
2640 v2 
Architecture x86-64 x86-64
Threads 20 16
L2 cache 2.5 MB 2 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 25 MB 20 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 2 2
Clock multiplier 19 20
Operating temperature Unknown - 92°C Unknown - 75°C

overclocking
Overclocked clock speed 1.9 GHz 2.55 GHz
Overclocked clock speed (Water) 1.9 GHz 2 GHz
Overclocked clock speed (Air) 1.9 GHz 2.55 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

memory controller
Memory controller Built-in Built-in
Memory type
DDR3
Channels Quad Channel Quad Channel
Supports ECC No Yes
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 786,432 MB 786,432 MB
Intel Xeon E5 2648L v2
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Intel Xeon E5 2640 v2
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