6 Cores, 6 Threads
@3.6GHz Coffee Lake (2017)

4 Cores, 4 Threads
@4.0GHz Coffee Lake (2017)

Real World Speed
Performance profile from 18,227 user samples
15,817 User Benchmarks
Best Bench: 121% Base clock 3.6 GHz, turbo 5.3 GHz (avg)
Worst Bench: 94% Base clock 3.6 GHz, turbo 0.8 GHz (avg)
Poor: 94% Great: 121%
SPEED RANK: 9th / 1052
Gaming 105%
Desktop 100%
Workstation 76%
2,410 User Benchmarks
Best Bench: 114% Base clock 4 GHz, turbo 4.9 GHz (avg)
Worst Bench: 78% Base clock 4 GHz, turbo 4.75 GHz (avg)
Poor: 78% Great: 114%
SPEED RANK: 18th / 1052
Gaming 96%
Nuclear submarine
Desktop 94%
Nuclear submarine
Workstation 58%
Effective Speed
Effective CPU Speed
104 % Slightly faster effective speed.
96.2 %
SC Mixed
Avg. Single Core Mixed Speed
135 Pts +2% 132 Pts
QC Mixed
Avg. Quad Core Mixed Speed
533 Pts Slightly faster quad-core speed.
499 Pts
MC Mixed
Avg. Multi Core Mixed Speed
776 Pts Much faster multi-core speed.
511 Pts
SC Mixed
OC Single Core Mixed Speed
156 Pts +1% 155 Pts
QC Mixed
OC Quad Core Mixed Speed
616 Pts +3% 598 Pts
MC Mixed
OC Multi Core Mixed Speed
899 Pts Much faster OC multi-core speed.
606 Pts
Market Share
Based on 7,889,714 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.66 % Hugely higher market share.
0.26 %
Value For Money
112 % 118 % Slightly better value.
User Rating
UBM User Rating
115 % Much more popular.
70 %
Price (score)
$243 $169 Much cheaper.
5 Months More recent.
6 Months
Thermal Design Power (TDP)
95 Watts 91 Watts +4%
CPU Processing Cores
6 cores Much higher core count.
4 cores
CPU Processing Threads
6 threads Much higher thread count.
4 threads
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.6 GHz 4 GHz Slightly faster base frequency.
Turbo Clock
Turbo Clock Speed
4.3 GHz Slightly faster turbo frequency.
4 GHz
SC Int
Single Core Integer Speed
151 Pts +1% 150 Pts
SC Float
Single Core Floating Point Speed
162 Pts +1% 161 Pts
QC Int
Quad Core Integer Speed
596 Pts +2% 582 Pts
QC Float
Quad Core Floating Point Speed
645 Pts +2% 631 Pts
MC Int
Multi Core Integer Speed
868 Pts Much faster multi-core int speed.
585 Pts
MC Float
Multi Core Floating Point Speed
946 Pts Much faster multi-core fp speed.
633 Pts
CPU Architecture
Coffee Lake (2017) Coffee Lake (2017)
Motherboard Socket
Integrated Graphics
UHD 630 UHD 630
9 MB 8 MB
Memory Types
Memory Types
DDR4-2666 DDR4-2400
Turbo Boost Tech
Intel® Turbo Boost Technology
2.0 No
Intel® TSX-NI
Yes No
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No

More specs » More specs »

The unlocked hex-core i5-8600K from Intel’s latest Coffee Lake generation of processors is the new flagship of the i5 series, succeeding the Kaby Lake quad-core i5-7600K. The 8th generation of processors brings the largest performance uplift since Sandy Bridge by adding more cores at each of the i3, i5 and i7 product lines. Like the other Coffee Lake processors, the i5-8600K is built upon optimized 14nm architecture, marginally improved upon from Kaby Lake and Skylake. The 8600K has a 95W TDP and a nominal stock clock of 3.6 GHz, which boosts to 4.1 GHz for all six cores, 4.2 GHz for dual/quad and 4.3 GHz for single core. Early benchmarks put the i5-8600K’s effective speed 15% ahead of the i5-7600K. A 50% increase in multi-core speed is explained by two additional cores and thanks to the quad-core clock bump from 4 GHz on the 7600K to 4.2 GHz on the 8600K there is also an additional 5% performance boost across all workloads. All Coffee Lake processors require a 300-series chipset, making a straight CPU upgrade unfeasible despite sharing the same socket as their Z270 predecessors. Even though most games still use less than 4 cores simultaneously, the i5-8600K is a great choice for gamers (especially streamers) but for $80 less, the 8350K which is faster than last years 7600K and only marginally weaker for gaming than the 8600K is certainly well worth considering as well. [Oct '17 CPUPro]


The quad core i3-8350K hails from Intel’s most recent (and as yet unreleased) generation of Coffee Lake processors. It has a stock clock of 4.0 GHz, 8MB of cache and a TDP of 95W. The 8350K is the first i3 processor to feature four cores (previous generations of i3s had two cores and four threads). With this eighth generation of processors, Intel has introduced a step change in their nomenclature which witnesses the old quad core i5s become the new quad core i3s. Our benchmarks show a 25% increase in effective speed between generations of i3 8350K vs 7350K and near equivalence between the outgoing i5-7600K and the new i3-8350K. Although the price points of Coffee Lake are not yet known, if Intel keep them roughly in line with the previous generations (i3 ~= $140) this will represent the best improvement in value for money since Sandy Bridge as the 8350K at $140 would be 34.8% cheaper than a 7600K at $215. Cynics among us will see this as an effort to fend off competition from AMD’s new multi-core Ryzen processors. It appears Intel may have been successful with this move as early benchmarks from the 8350K suggest that it beats the more expensive 8 core Ryzen 7 1700 in single and quad core performance by 25%. The 8350K is a great choice for gaming builds, but the budget will also need to factor in a complementary motherboard based on the new 300 series chipset. Expect the quad core i3-8100 which is the 8350K’s little sister featuring a base clock of 3.6 GHz, to follow shortly. [Aug '17 CPUPro]


Processor Rankings (Price vs Performance) March 2018 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance and price.
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Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $149
AMD Ryzen 5 1600 $189AMD RX 480 $400Samsung 850 Pro 256GB $129
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Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
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