CPUBoss Review Our evaluation of E5-1660 vs 980X


Benchmark performance using all cores

PassMark and GeekBench

Single-core Performance

Individual core benchmark performance

PassMark (Single Core)

Power Consumption

How much power does the processor require?



Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Power Consumption and Value

Intel Xeon E5-1660 

CPUBoss recommends the Intel Xeon E5-1660  based on its performance, single-core performance and value.

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Intel Xeon E5-1660

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Front view of Intel Xeon E5-1660

Differences What are the advantages of each

Front view of Intel Xeon E5-1660

Reasons to consider the
Intel Xeon E5-1660

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Higher turbo clock speed 3.9 GHz vs 3.6 GHz Around 10% higher turbo clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Better PassMark (Single core) score 1,989 vs 1,444 Around 40% better PassMark (Single core) score
Better PassMark score 12,694 vs 8,944 More than 40% better PassMark score
Better geekbench 2 (32-bit) score 19,202 vs 14,533 More than 30% better geekbench 2 (32-bit) score
Newer Mar, 2012 vs Mar, 2010 Release date over 2 years later
Supports more RAM 262,144 MB vs 24,576 MB Supports around 10.8x more RAM
Better performance per dollar 1.79 pt/$ vs 0.68 pt/$ Around 2.8x better performance per dollar
Significantly lower annual home energy cost 31.32 $/year vs 50.68 $/year Around 40% lower annual home energy cost
Slightly better overclocked clock speed (Air) 4.81 GHz vs 4.54 GHz More than 5% better overclocked clock speed (Air)
Lower annual commercial energy cost 113.88 $/year vs 148.92 $/year Around 25% lower annual commercial energy cost
Front view of Intel Core i7 980X

Reasons to consider the
Intel Core i7 980X

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Significantly better overclocked clock speed (Water) 4.9 GHz vs 3.3 GHz Around 50% better overclocked clock speed (Water)
Higher Maximum operating temperature 67.9 °C vs 64 °C More than 5% higher Maximum operating temperature

Benchmarks Real world tests of Xeon E5-1660 vs Core i7 980X

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5-1660
Core i7 980X

GeekBench (64-bit) Data courtesy Primate Labs

Xeon E5-1660
Core i7 980X


Xeon E5-1660
Core i7 980X

PassMark Data courtesy Passmark

Xeon E5-1660
Core i7 980X

PassMark (Single Core)

Specifications Full list of technical specs


Xeon E5-1660  vs
Core i7 980X 
Clock speed 3.3 GHz 3.33 GHz
Turbo clock speed 3.9 GHz 3.6 GHz
Cores Hexa core Hexa core
Socket type
LGA 2011
LGA 1366


Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 130W
Annual home energy cost 31.32 $/year 50.68 $/year
Annual commercial energy cost 113.88 $/year 148.92 $/year
Performance per watt 8.39 pt/W 3.64 pt/W
Typical power consumption 105.63W N/A

memory controller

Memory controller Built-in Built-in
Memory type
Channels Quad Channel Triple Channel
Supports ECC Yes No
Maximum bandwidth 51,200 MB/s 25,599.99 MB/s
Maximum memory size 262,144 MB 24,576 MB


Xeon E5-1660  vs
Core i7 980X 
Architecture x86-64 x86-64
Threads 12 12
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 0.33 MB/core
L3 cache 15 MB 12 MB
L3 cache per core 2.5 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 39 25
Voltage range 0.6 - 1.35V 0.8 - 1.38V
Operating temperature Unknown - 64°C Unknown - 67.9°C


Overclock popularity 1 85
Overclocked clock speed 4.81 GHz 4.54 GHz
Overclocked clock speed (Water) 3.3 GHz 4.9 GHz
Overclocked clock speed (Air) 4.81 GHz 4.54 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


Architecture QPI QPI
Number of links 0 1
Transfer rate 0 MT/s 6,400 MT/s
Clock speed 0 MHz 3,200 MHz
Intel Xeon E5-1660
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Intel Core i7 980X
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