IntelBX80684I58600K
IntelBX80677I57640X

6 Cores, 6 Threads @3.6GHz, Coffee Lake.
Release date: Q4 2017.

4 Cores, 4 Threads @4.00 GHz, Kaby Lake.
Release date ≈ Q3 2017.

Real World Speed
Performance profile from 117,637 user samples
116,627 User Benchmarks
Best Bench: 107% Base clock 3.6 GHz, turbo 5.3 GHz (avg)
Worst Bench: 76% Base clock 3.6 GHz, turbo 3.6 GHz (avg)
Poor: 76% Great: 107%
SPEED RANK: 16th / 1173
Gaming
Gaming 91%
Nuclear submarine
Desktop
Desktop 91%
Nuclear submarine
Workstation
Workstation 58%
Gunboat
1,010 User Benchmarks
Best Bench: 104% Base clock 4 GHz, turbo 5.2 GHz (avg)
Worst Bench: 65% Base clock 4 GHz, turbo 1 GHz (avg)
Poor: 65% Great: 104%
SPEED RANK: 34th / 1173
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 43%
Speed boat
Effective Speed
Effective CPU Speed
90.5 % Slightly faster effective speed.
+7%
84.6 %
SC Mixed
Avg. Single Core Mixed Speed
133 Pts +3% 129 Pts
QC Mixed
Avg. Quad Core Mixed Speed
516 Pts Slightly faster quad-core speed.
+9%
472 Pts
MC Mixed
Avg. Multi Core Mixed Speed
739 Pts Much faster multi-core speed.
+52%
487 Pts
SC Mixed
OC Single Core Mixed Speed
156 Pts 158 Pts +1%
QC Mixed
OC Quad Core Mixed Speed
612 Pts +4% 589 Pts
MC Mixed
OC Multi Core Mixed Speed
886 Pts Much faster OC multi-core speed.
+48%
598 Pts
Market Share
Based on 18,643,992 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.8 % Insanely higher market share.
+7,900%
0.01 %
Value
Value For Money
94.5 % Slightly better value.
+15%
82.5 %
User Rating
UBM User Rating
132 % Hugely more popular.
+116%
61 %
Price
Price (score)
$260 Cheaper.
+17%
$312
Age
Newest
21 Months Slightly more recent.
+12%
24+ Months
SC Int
Single Core Integer Speed
150 Pts 151 Pts +1%
SC Float
Single Core Floating Point Speed
162 Pts 165 Pts +2%
QC Int
Quad Core Integer Speed
583 Pts Slightly faster quad-core int speed.
+6%
552 Pts
QC Float
Quad Core Floating Point Speed
648 Pts +2% 638 Pts
MC Int
Multi Core Integer Speed
836 Pts Much faster multi-core int speed.
+48%
564 Pts
MC Float
Multi Core Floating Point Speed
954 Pts Much faster multi-core fp speed.
+49%
640 Pts
Launch Date
Launch Date
Q4'17 Q2'17
Cache
Cache
9 MB 6 MB
Recommended Price
Recommended Customer Price
N/A $242.00 - $243.00
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2017X
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 None
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16 or 2x8 or 1x8+2x4 Up to 1x16, 2x8, 1x8+2x4

More specs » More specs »
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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]

MORE DETAILS

Processor Rankings (Price vs Performance) July 2019 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]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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  • - CPU tests include: integer, floating and string.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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 Frequently Asked Questions

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CPUGPUSSD
Intel Core i7-8700K $350Nvidia GTX 1070 $400Samsung 850 Evo 250GB $104
AMD Ryzen 5 2600 $127Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $103
AMD Ryzen 7 2700X $248Nvidia GTX 1080-Ti $750Samsung 850 Pro 256GB $97
HDDRAMUSB
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Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $728SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $78SanDisk Ultra Fit 32GB $12
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