Intel Core i7 875K 

Released April, 2010
  • 2.93 GHz
  • Quad core
  • Unlocked
4.4 Out of 10

So it's great to see it making more effort by offering this moderately affordable processor with an unlocked multiplier.
by Tech Radar (Sep, 2010)
In practice, the unlocked multiplier isn't much of a help when overclocking on air.
by Tech Radar (Sep, 2010)

CPUBoss Review Our evaluation of the Intel Core i7 875K among desktop CPUs (over 75W)


Benchmark performance using all cores

Core i7 875K
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

Core i7 875K
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Core i7 875K
Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

Core i7 875K
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Core i7 875K
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more


Are you paying a premium for performance?

Core i7 875K
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more


CPUBoss Score

Combination of all six facets

Core i7 875K

Benchmarks Real world tests of the Intel Core i7 875K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 875K
Core i7 870
Core i7 880

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i7 875K
Core i7 880
Core i7 870

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 875K
160,300 MB/s
Core i7 870
142,100 MB/s
Core i7 880
147,950 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i7 875K
Core i7 880
Core i7 870

GeekBench (64-bit) Data courtesy Primate Labs

Core i7 875K
Core i7 870


Core i7 875K
Core i7 870
Core i7 880

PassMark Data courtesy Passmark

Core i7 875K
Core i7 880
Core i7 870

PassMark (Single Core)

Core i7 875K
Core i7 880
Core i7 870

Reviews Word on the street for the Intel Core i7 875K

It's identical to the 870 save for a slightly elevated price tag and an overclocking friendly unlocked multiplier.

What People Are Saying Give it to me straight

Socket Type

This is an amazing price difference as the Core i7-875K costs a whopping 41% less than the Core i7-870.
by Legit Reviews (May, 2010)
The only real big news here is that the processor has become unlocked for easier overclocking and that the price has been slashed for the flasgship LGA 1156 processor.
by Legit Reviews (May, 2010)
Intel Turbo Boost Technology is very interesting technology and it's impressive to see the core go from 1.2GHz to 3.6GHz depending on the work load that is taking place on a processor like the 875K.
by Legit Reviews (May, 2010)


They dropped the price from $580 on the Core i7-870 to $342 on the Core i7-875K.
by Legit Reviews (May, 2010)
Here is a CPU-Z v1.54 screen shot of the Intel Core i7 875 K processor to see what we are going to be overclocking.
by Legit Reviews (May, 2010)
With the resolution dropped down to 800 x 600 some performance differences can be seen, but who plays games at 800 x 600?
by Legit Reviews (May, 2010)


The technology and general performance of the processor remains the same.
by Legit Reviews (May, 2010)
The Core i7 875K is just over half a frame per second quicker in our HD video encoding benchmark, for instance.
by Tech Radar (Sep, 2010)
In order to reach the highest overall clock frequency we had to drop the memory multiplier down by one level and pushed up the base clock to 180MHz with the turbo multiplier of 24.
by Legit Reviews (May, 2010)


In fact the Intel Core i7-870 is identical to the Core i7-875K processor in regards to everything with the exception of the core being unlocked.
by Legit Reviews (May, 2010)
Short of a six-core monster machine, it's a hard to imagine what can beat it.
by Tech Radar (Sep, 2010)
Moreover, like any Nehalem-class quad-core processor, all round performance is pretty epic.
by Tech Radar (Sep, 2010)


The Lynnfield processors aren't part of the top tier product line, so Intel didn't offer any unlocked parts.
by Legit Reviews (May, 2010)
The release of the 'K-SKUs' from Intel doesn't bring anything other than an unlocked processor to the table.
by Legit Reviews (May, 2010)
All of which means that the unlocked multiplier that comes with the K-series moniker had better deliver the goods.
by Tech Radar (Sep, 2010)

Specifications Full list of technical specs


Clock speed 2.93 GHz
Turbo clock speed 3.6 GHz
Cores Quad core
Socket type LGA 1156
Is unlocked Yes


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

power consumption

Annual home energy cost 22.89 $/year
Annual commercial energy cost 83.22 $/year
Performance per watt 2.32 pt/W
Typical power consumption 77.19W

memory controller

Memory controller Built-in
Memory type
  1. DDR3-1333
  2. DDR3-1066
  3. DDR3
Channels Dual Channel
Supports ECC No
Maximum bandwidth 21,333.32 MB/s
Maximum memory size 16,384 MB


Architecture x86-64
Threads 8 threads
L2 cache 1 MB
L2 cache per core 0.25 MB/core
L3 cache 8 MB
L3 cache per core 2 MB/core
Manufacture process 45 nm
Transistor count 774,000,000
Max CPUs 1
Clock multiplier 22
Voltage range 0.65 - 1.4V
Operating temperature Unknown - 72.7°C


Overclock popularity 13
Overclocked clock speed 4.1 GHz
Overclocked clock speed (Water) 4.09 GHz
Overclocked clock speed (Air) 4.1 GHz

integrated graphics

GPU None


Architecture DMI
Transfer rate 2,500 MT/s
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