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Differences What are the advantages of each

Front view of Intel Xeon E7-2820

Reasons to consider the
Intel Xeon E7-2820

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Much more l3 cache 18 MB vs 2 MB 9x more l3 cache; more data can be stored in the l3 cache for quick access later
Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
More threads 16 vs 2 14 more threads
More cores 8 vs 2 6 more cores; run more applications at once
Supports more RAM 1,048,576 MB vs 16,384 MB Supports 64x more RAM
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much more l3 cache per core 2.25 MB/core vs 1 MB/core 2.2x more l3 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Front view of Intel Pentium B980

Reasons to consider the
Intel Pentium B980

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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 85.31W 3x lower typical power consumption
Higher clock speed 2.4 GHz vs 2 GHz Around 20% higher clock speed
Significantly higher Maximum operating temperature 85 °C vs 64 °C Around 35% higher Maximum operating temperature
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual home energy cost 8.43 $/year vs 25.29 $/year 3x lower annual home energy cost
Much lower annual commercial energy cost 30.66 $/year vs 91.98 $/year 3x lower annual commercial energy cost
Newer Apr, 2012 vs Apr, 2011 Release date a year later

Features Key features of the Xeon E7-2820  vs Pentium B980 

clock speed

Xeon E7-2820
2 GHz
Pentium B980
2.4 GHz

L2 cache

L3 cache

TDP

Specifications Full list of technical specs

summary

Xeon E7-2820  vs
Pentium B980 
Clock speed 2 GHz 2.4 GHz
Cores Octa core Dual core
Socket type
LGA 1567
rPGA 988B

features

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

power consumption

TDP 105W 35W
Annual home energy cost 25.29 $/year 8.43 $/year
Annual commercial energy cost 91.98 $/year 30.66 $/year
Typical power consumption 85.31W 28.44W

bus

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

details

Xeon E7-2820  vs
Pentium B980 
Architecture x86-64 x86-64
Threads 16 2
L2 cache 2 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 18 MB 2 MB
L3 cache per core 2.25 MB/core 1 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 1
Clock multiplier 15 24
Operating temperature Unknown - 64°C Unknown - 85°C

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
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR
Channels Quad Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 25,600 MB/s 21,333.32 MB/s
Maximum memory size 1,048,576 MB 16,384 MB
Intel Xeon E7-2820
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Intel Pentium B980
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