IntelBX80662I56600K
IntelBX80684I58600K

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

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

Real World Speed
Performance profile from 214,251 user samples
146,874 User Benchmarks
Best Bench: 103% Base clock 3.5 GHz, turbo 4.8 GHz (avg)
Worst Bench: 63% Base clock 3.5 GHz, turbo 1.1 GHz (avg)
Poor: 63% Great: 103%
SPEED RANK: 58th / 1143
Gaming
Gaming 84%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 51%
Yacht
67,377 User Benchmarks
Best Bench: 119% Base clock 3.6 GHz, turbo 5.2 GHz (avg)
Worst Bench: 91% Base clock 3.6 GHz, turbo 4.05 GHz (avg)
Poor: 91% Great: 119%
SPEED RANK: 22nd / 1143
Gaming
Gaming 102%
UFO
Desktop
Desktop 98%
Nuclear submarine
Workstation
Workstation 74%
Battleship
Effective Speed
Effective CPU Speed
84.2 % 102 % Faster effective speed.
+21%
SC Mixed
Avg. Single Core Mixed Speed
118 Pts 132 Pts Slightly faster single-core speed.
+12%
QC Mixed
Avg. Quad Core Mixed Speed
433 Pts 518 Pts Faster quad-core speed.
+20%
MC Mixed
Avg. Multi Core Mixed Speed
444 Pts 750 Pts Much faster multi-core speed.
+69%
SC Mixed
OC Single Core Mixed Speed
141 Pts 155 Pts Slightly faster OC single-core speed.
+10%
QC Mixed
OC Quad Core Mixed Speed
539 Pts 603 Pts Slightly faster OC quad-core speed.
+12%
MC Mixed
OC Multi Core Mixed Speed
548 Pts 884 Pts Much faster OC multi-core speed.
+61%
Market Share
Based on 12,890,113 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.28 % 1.52 % Higher market share.
+19%
Value
Value For Money
91.8 % 109 % Better value.
+19%
User Rating
UBM User Rating
79 % 136 % Much more popular.
+72%
Price
Price (score)
$232 +3% $240
Age
Newest
40 Months 14 Months Much more recent.
+65%
TDP
Thermal Design Power (TDP)
91 Watts +4% 95 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
4 threads 6 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.5 GHz 3.6 GHz +3%
Turbo Clock
Turbo Clock Speed
3.9 GHz 4.3 GHz Slightly faster turbo frequency.
+10%
SC Int
Single Core Integer Speed
136 Pts 149 Pts Slightly faster single-core int speed.
+10%
SC Float
Single Core Floating Point Speed
149 Pts 162 Pts Slightly faster single-core fp speed.
+9%
QC Int
Quad Core Integer Speed
516 Pts 579 Pts Slightly faster quad-core int speed.
+12%
QC Float
Quad Core Floating Point Speed
578 Pts 647 Pts Slightly faster quad-core fp speed.
+12%
MC Int
Multi Core Integer Speed
521 Pts 845 Pts Much faster multi-core int speed.
+62%
MC Float
Multi Core Floating Point Speed
581 Pts 950 Pts Much faster multi-core fp speed.
+64%
Series
CPU Architecture
Skylake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
HD 530 UHD 630
Launch Date
Launch Date
Q3'15 Q4'17
Cache
Cache
6 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Recommended Price
Recommended Customer Price
$242.00 - $243.00 N/A
Thermal Solution Specification
Thermal Solution Specification
PCG 2015D (130W) PCG 2015C (130W)
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® UHD Graphics 630
vPro Tech
Intel® vPro™ Technology ‡
No Yes
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
No Yes
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
No Yes
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16, 2x8, 1x8+2x4 Up to 1x16 or 2x8 or 1x8+2x4

More specs » More specs »
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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

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) December 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]

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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 $370Nvidia GTX 1070 $330Samsung 850 Evo 250GB $63
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $98
Intel Core i5-8600K $240Nvidia GTX 1080-Ti $116Samsung 850 Pro 256GB $110
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $125SanDisk Extreme 64GB $72
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $830SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
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