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

No winner declared

Too close to call

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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
Significantly better geekbench (64-bit) score 24,680 vs 15,436 Around 60% better geekbench (64-bit) score
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More l3 cache 15 MB vs 12 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
Better PassMark score 13,569 vs 8,926 More than 50% better PassMark score
Better PassMark (Single core) score 2,089 vs 1,442 Around 45% better PassMark (Single core) score
Better performance per watt 16.1 pt/W vs 5.35 pt/W More than 3x better performance per watt
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Marginally 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
Significantly lower annual home energy cost 31.32 $/year vs 50.68 $/year Around 40% lower annual home energy cost
Slightly better performance per dollar 1.9 pt/$ vs 1.24 pt/$ Around 55% better performance per dollar
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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Slightly 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)

Xeon E5-1660
Core i7 980X

GeekBench (64-bit)

Xeon E5-1660
Core i7 980X


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
Is hyperthreaded Yes Yes


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


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
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 nms 32 nms
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

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 16.1 pt/W 5.35 pt/W
Typical power consumption 105.63W N/A


Architecture QPI QPI
Number of links 1 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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