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Differences What are the advantages of each

Front view of Intel Xeon 5040

Reasons to consider the
Intel Xeon 5040

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Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher clock speed 2.83 GHz vs 2.4 GHz Around 20% higher clock speed
Much more l2 cache per core 2 MB/core vs 0.5 MB/core 4x more l2 cache per core
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Better overclocked clock speed (Air) 2.83 GHz vs 2.4 GHz Around 20% better overclocked clock speed (Air)
More threads 4 vs 2 Twice as many threads
Better overclocked clock speed (Water) 2.83 GHz vs 2.4 GHz Around 20% better overclocked clock speed (Water)
Front view of Intel Pentium B980

Reasons to consider the
Intel Pentium B980

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Much newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 28.44W vs 77.19W 2.7x lower typical power consumption
Significantly higher Maximum operating temperature 85 °C vs 67 °C More than 25% higher Maximum operating temperature
Much lower annual home energy cost 8.43 $/year vs 22.89 $/year 2.7x lower annual home energy cost
Much lower annual commercial energy cost 30.66 $/year vs 83.22 $/year 2.7x lower annual commercial energy cost

Features Key features of the Xeon 5040  vs Pentium B980 

clock speed

Xeon 5040
2.83 GHz
Pentium B980
2.4 GHz

L2 cache

overclocked clock speed (air)

Xeon 5040
2.83 GHz
Pentium B980
2.4 GHz

overclocked clock speed (water)

Xeon 5040
2.83 GHz
Pentium B980
2.4 GHz

TDP

Specifications Full list of technical specs

summary

Xeon 5040  vs
Pentium B980 
Clock speed 2.83 GHz 2.4 GHz
Cores Dual core Dual core
Socket type
LGA 771
rPGA 988B

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes No
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 35W
Annual home energy cost 22.89 $/year 8.43 $/year
Annual commercial energy cost 83.22 $/year 30.66 $/year
Typical power consumption 77.19W 28.44W

bus

Architecture FSB DMI
Number of links 1 1

details

Xeon 5040  vs
Pentium B980 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 4 MB 1 MB
L2 cache per core 2 MB/core 0.5 MB/core
Manufacture process 65 nm 32 nm
Max CPUs 2 1
Clock multiplier 17 24
Operating temperature Unknown - 67°C Unknown - 85°C

overclocking

Overclocked clock speed 2.83 GHz 2.4 GHz
Overclocked clock speed (Water) 2.83 GHz 2.4 GHz
Overclocked clock speed (Air) 2.83 GHz 2.4 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 650 MHz
Turbo clock speed N/A 1,150 MHz

memory controller

Memory controller Built-in Built-in
Supports ECC No No
Intel Xeon 5040
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Intel Pentium B980
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