CPUBoss Review Our evaluation of 975 vs 1389 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

Intel Core i7 975

CPUBoss Winner
Front view of Intel Core i7 975

Differences What are the advantages of each

Front view of Intel Core i7 975

Reasons to consider the
Intel Core i7 975

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Higher clock speed 3.33 GHz vs 2.9 GHz Around 15% higher clock speed
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Significantly better overclocked clock speed (Air) 4.46 GHz vs 3.48 GHz Around 30% better overclocked clock speed (Air)
Better PassMark (Single core) score 1,461 vs 1,015 Around 45% better PassMark (Single core) score
Better PassMark score 6,173 vs 3,046 More than 2x better PassMark score
More threads 8 vs 4 Twice as many threads
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Much better overclocked clock speed (Water) 4.45 GHz vs 2.9 GHz Around 55% better overclocked clock speed (Water)
Front view of AMD Opteron 1389

Reasons to consider the
AMD Opteron 1389

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Much lower typical power consumption 60.94W vs 212W 3.5x lower typical power consumption
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
Much lower annual home energy cost 18.07 $/year vs 82.69 $/year 4.6x lower annual home energy cost
Much lower annual commercial energy cost 65.7 $/year vs 211.12 $/year 3.2x lower annual commercial energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Slightly better performance per watt 1.59 pt/W vs 0.93 pt/W More than 70% better performance per watt

Benchmarks Real world tests of Core i7 975 vs Opteron 1389

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 975  vs
Opteron 1389 
Clock speed 3.33 GHz 2.9 GHz
Cores Quad core Quad core
Socket type
LGA 1366
AM3
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 75W
Annual home energy cost 82.69 $/year 18.07 $/year
Annual commercial energy cost 211.12 $/year 65.7 $/year
Performance per watt 0.93 pt/W 1.59 pt/W
Typical power consumption 212W 60.94W

bus

Architecture QPI HyperTransport 3.0
Clock speed 3,200 MHz 2,200 MHz

details

Core i7 975  vs
Opteron 1389 
Threads 8 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Clock multiplier 25 14
Voltage range 0.8 - 1.38V 1.05 - 1.23V
Operating temperature 5 - 67.9°C Unknown - 70°C

overclocking

Overclocked clock speed 4.46 GHz 3.48 GHz
Overclocked clock speed (Water) 4.45 GHz 2.9 GHz
Overclocked clock speed (Air) 4.46 GHz 3.48 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
Intel Core i7 975
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AMD Opteron 1389
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