CPUBoss Review Our evaluation of W3580 vs 975 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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VS

Differences What are the advantages of each

Front view of Intel Xeon W3580

Reasons to consider the
Intel Xeon W3580

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Much lower typical power consumption 105.63W vs 212W 2x lower typical power consumption
Much lower annual home energy cost 31.32 $/year vs 82.69 $/year 2.6x lower annual home energy cost
Much lower annual commercial energy cost 113.88 $/year vs 211.12 $/year More than 45% lower annual commercial energy cost
Better performance per watt 1.71 pt/W vs 0.93 pt/W Around 85% better performance per watt
Newer Aug, 2009 vs Jun, 2009 Release date 2 months later
Front view of Intel Core i7 975

Reasons to consider the
Intel Core i7 975

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Much better geekbench 3 AES single core score 152,250 MB/s vs 144,950 MB/s More than 5% better geekbench 3 AES single core score
Significantly better overclocked clock speed (Water) 4.45 GHz vs 3.33 GHz Around 35% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon W3580 vs Core i7 975

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon W3580
8,928
Core i7 975
9,214

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon W3580
2,344
Core i7 975
2,324

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon W3580
144,950 MB/s
Core i7 975
152,250 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon W3580
9,367
Core i7 975
9,229

GeekBench (64-bit) Data courtesy Primate Labs

Xeon W3580
10,164
Core i7 975
9,894

GeekBench

Xeon W3580
10,164
Core i7 975
11,512

PassMark Data courtesy Passmark

Xeon W3580
6,412
Core i7 975
6,173

PassMark (Single Core)

Xeon W3580
1,509
Core i7 975
1,461

Specifications Full list of technical specs

summary

Xeon W3580  vs
Core i7 975 
Clock speed 3.33 GHz 3.33 GHz
Turbo clock speed 3.6 GHz 3.6 GHz
Cores Quad core Quad core
Socket type
LGA 1366

features

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

power consumption

TDP 130W 130W
Annual home energy cost 31.32 $/year 82.69 $/year
Annual commercial energy cost 113.88 $/year 211.12 $/year
Performance per watt 1.71 pt/W 0.93 pt/W
Typical power consumption 105.63W 212W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes No
Maximum bandwidth 31,999.98 MB/s 25,599.99 MB/s
Maximum memory size 24,576 MB 24,000 MB

details

Xeon W3580  vs
Core i7 975 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 45 nm
Transistor count 731,000,000 731,000,000
Max CPUs 1 1
Clock multiplier 25 25
Voltage range 0.8 - 1.38V 0.8 - 1.38V
Operating temperature Unknown - 67.9°C 5 - 67.9°C

overclocking

Overclocked clock speed 4.6 GHz 4.46 GHz
Overclocked clock speed (Water) 3.33 GHz 4.45 GHz
Overclocked clock speed (Air) 4.6 GHz 4.46 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

bus

Architecture QPI QPI
Number of links 1 1
Data rate 25,600 MB/s 25,600 MB/s
Transfer rate 6,400 MT/s 6,400 MT/s
Clock speed 3,200 MHz 3,200 MHz
Intel Xeon W3580
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Intel Core i7 975
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