IntelBX80684I58600K
IntelBX80662I56600K

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

4 Cores, 4 Threads @3.5GHz, Skylake.
Release date: Q3 2015.

Real World Speed
Performance profile from 264,752 user samples
88,663 User Benchmarks
Best Bench: 117% Base clock 3.6 GHz, turbo 5.3 GHz (avg)
Worst Bench: 87% Base clock 3.6 GHz, turbo 3.6 GHz (avg)
Poor: 87% Great: 117%
SPEED RANK: 26th / 1146
Gaming
Gaming 101%
UFO
Desktop
Desktop 97%
Nuclear submarine
Workstation
Workstation 73%
Battleship
176,089 User Benchmarks
Best Bench: 103% Base clock 3.5 GHz, turbo 4.8 GHz (avg)
Worst Bench: 65% Base clock 3.5 GHz, turbo 0.75 GHz (avg)
Poor: 65% Great: 103%
SPEED RANK: 57th / 1146
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 84%
Aircraft carrier
Workstation
Workstation 52%
Yacht
Effective Speed
Effective CPU Speed
101 % Faster effective speed.
+18%
85.2 %
SC Mixed
Avg. Single Core Mixed Speed
132 Pts Slightly faster single-core speed.
+11%
119 Pts
QC Mixed
Avg. Quad Core Mixed Speed
513 Pts Faster quad-core speed.
+17%
439 Pts
MC Mixed
Avg. Multi Core Mixed Speed
738 Pts Much faster multi-core speed.
+64%
449 Pts
SC Mixed
OC Single Core Mixed Speed
152 Pts Slightly faster OC single-core speed.
+8%
141 Pts
QC Mixed
OC Quad Core Mixed Speed
599 Pts Slightly faster OC quad-core speed.
+11%
540 Pts
MC Mixed
OC Multi Core Mixed Speed
876 Pts Much faster OC multi-core speed.
+61%
543 Pts
Market Share
Based on 14,805,264 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.08 % 1.15 % Slightly higher market share.
+6%
Value
Value For Money
105 % Slightly better value.
+15%
92 %
User Rating
UBM User Rating
130 % Much more popular.
+60%
81 %
Price
Price (score)
$259 $237 Slightly cheaper.
+8%
Age
Newest
16 Months Much more recent.
+62%
42 Months
TDP
Thermal Design Power (TDP)
95 Watts 91 Watts +4%
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores
Threads
CPU Processing Threads
6 threads Much higher thread count.
+50%
4 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.6 GHz +3% 3.5 GHz
Turbo Clock
Turbo Clock Speed
4.3 GHz Slightly faster turbo frequency.
+10%
3.9 GHz
SC Int
Single Core Integer Speed
146 Pts Slightly faster single-core int speed.
+8%
135 Pts
SC Float
Single Core Floating Point Speed
160 Pts Slightly faster single-core fp speed.
+7%
149 Pts
QC Int
Quad Core Integer Speed
574 Pts Slightly faster quad-core int speed.
+13%
509 Pts
QC Float
Quad Core Floating Point Speed
635 Pts Slightly faster quad-core fp speed.
+9%
581 Pts
MC Int
Multi Core Integer Speed
827 Pts Much faster multi-core int speed.
+61%
514 Pts
MC Float
Multi Core Floating Point Speed
936 Pts Much faster multi-core fp speed.
+62%
579 Pts
Series
CPU Architecture
Coffee Lake Skylake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 HD 530
Launch Date
Launch Date
Q4'17 Q3'15
Cache
Cache
9 MB 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Recommended Price
Recommended Customer Price
N/A $242.00 - $243.00
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2015D (130W)
Memory Types
Memory Types
DDR4-2666 DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 530
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
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

The Intel Core i5-6600K is based on the new "Skylake" 14nm manufacturing process. Sporting 4 physical cores with base/turbo clocks of 3.5/3.9 GHz the 6600K and its predecessor, the 4690K share the same basic configuration and disappointingly, offer similar performance. Comparing the 6600K and 6700K shows that the 6700K has faster multi and single core performance. The improved multi core performance is due to Hyperthreading which is the key differentiator for the i7-6700K. The gap in single core performance can largely be eliminated by overclocking the i5-6600K so although the stock effective speed is significantly higher on the 6700K, this gap diminishes significantly when both processors are overclocked. At a 30% discount, the 6600K is the better value gaming CPU. [Aug '15 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) February 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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CPUGPUSSD
Intel Core i7-8700K $360Nvidia GTX 1070 $330Samsung 850 Evo 250GB $78
AMD Ryzen 5 1600 $148Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $80
Intel Core i5-8600K $259Nvidia GTX 1080-Ti $770Samsung 850 Pro 256GB $150
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $110SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $750SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $41Corsair Vengeance LPX DDR4 3200 C16 2x8GB $120SanDisk Ultra Fit 32GB $12
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