IntelBX80684I58600K
IntelBX80684I58400

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

6 Cores, 6 Threads
@2.8GHz Coffee Lake (2017)

Real World Speed
Performance profile from 17,743 user samples
12,970 User Benchmarks
Best Bench: 123% Base clock 3.6 GHz, turbo 5.3 GHz (avg)
Worst Bench: 94% Base clock 3.6 GHz, turbo 2.2 GHz (avg)
Poor: 94% Great: 123%
SPEED RANK: 8th / 985
Gaming
Gaming 105%
UFO
Desktop
Desktop 101%
UFO
Workstation
Workstation 77%
Battleship
4,773 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 88% Base clock 2.8 GHz, turbo 1.1 GHz (avg)
Poor: 88% Great: 96%
SPEED RANK: 23rd / 985
Gaming
Gaming 93%
Nuclear submarine
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 68%
Battle cruiser
Effective Speed
Effective CPU Speed
105 % Slightly faster effective speed.
+14%
92.5 %
SC Mixed
Avg. Single Core Mixed Speed
136 Pts Slightly faster single-core speed.
+13%
120 Pts
QC Mixed
Avg. Quad Core Mixed Speed
537 Pts Slightly faster quad-core speed.
+14%
471 Pts
MC Mixed
Avg. Multi Core Mixed Speed
784 Pts Slightly faster multi-core speed.
+13%
691 Pts
SC Mixed
OC Single Core Mixed Speed
158 Pts Faster OC single-core speed.
+25%
126 Pts
QC Mixed
OC Quad Core Mixed Speed
631 Pts Faster OC quad-core speed.
+29%
490 Pts
MC Mixed
OC Multi Core Mixed Speed
924 Pts Faster OC multi-core speed.
+27%
729 Pts
Market Share
Based on 7,515,242 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.14 % Hugely higher market share.
+84%
0.62 %
Value
Value For Money
114 % +3% 111 %
User Rating
UBM User Rating
116 % +3% 113 %
Price
Price (score)
$235 $179 Cheaper.
+24%
Age
Newest
4 Months 4 Months
TDP
Thermal Design Power (TDP)
95 Watts 65 Watts Much more energy efficient.
+32%
Cores
CPU Processing Cores
6 cores 6 cores
Threads
CPU Processing Threads
6 threads 6 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.6 GHz Faster base frequency.
+29%
2.8 GHz
Turbo Clock
Turbo Clock Speed
4.3 GHz Slightly faster turbo frequency.
+8%
4 GHz
SC Int
Single Core Integer Speed
154 Pts Faster single-core int speed.
+26%
122 Pts
SC Float
Single Core Floating Point Speed
163 Pts Faster single-core fp speed.
+26%
129 Pts
QC Int
Quad Core Integer Speed
614 Pts Faster quad-core int speed.
+28%
478 Pts
QC Float
Quad Core Floating Point Speed
650 Pts Faster quad-core fp speed.
+28%
506 Pts
MC Int
Multi Core Integer Speed
899 Pts Faster multi-core int speed.
+27%
709 Pts
MC Float
Multi Core Floating Point Speed
970 Pts Faster multi-core fp speed.
+29%
752 Pts
Series
CPU Architecture
Coffee Lake (2017) Coffee Lake (2017)
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 UHD 630
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2015C (65W)
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.05 GHz
TSX-NI
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 »
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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]

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The i5-8400 is a competitively priced hex-core processor from Intel’s 8th generation of Core processors (Coffee Lake). Along with the release of the unlocked i5-8600K, this is the first time that six-core processors have featured in the i5 line-up. Like the other Coffee Lake processors, the i5-8400 is based upon an improved version of Intel’s 14nm architecture which featured in both Skylake and Kaby Lake. Early benchmarks reveal that for average quad core usage (most games employ a maximum of four cores) the i5-8400 performs way above its pay grade. It achieves quad core mixed speeds close to Intel’s outgoing 2017 flagship the $300, quad-core, 8 thread i7-7700k, which to date has been a strong favourite for high-end gaming setups. On paper, the i5-8400 has a base clock of 2.8 GHz (Intel are significantly downplaying the performance of this SKU by giving it a relatively low nominal base clock), an all core boost of 3.8 GHz (this is the effective base clock figure that counts) and a single core boost of 4 GHz. This compares reasonably well to the i5-8600K which has a base clock of 3.6 GHz, all core boost of 4.1 GHz and a single core boost of 4.3 GHz. The i5-8400 also features 9MB of L3 cache and an energy-thrifty TDP of 65W. Priced at under $190, the i5-8400 offers fantastic value for money. Unfortunately, like the other Coffee Lake processors, the i5-8400 will require a new 300 series motherboard, and at the time of writing, the only available version is Intel’s high-end Z370 which isn't an ideal pairing for the i5-8400. The Z series motherboards are designed to cater for the unlocked and overclockable "K" SKUs. Cheaper 300 series motherboards will be available in 2018 at which time the 8400 will offer even better value for money. [Oct '17 CPUPro]

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Processor Rankings (Price vs Performance) February 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.
  • 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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CPUGPUSSD
Intel Core i7-8700K $330Nvidia GTX 1070 $430Samsung 850 Evo 250GB $88
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $285Samsung 850 Evo 500GB $146
AMD Ryzen 5 1600 $170AMD RX 480 $400Samsung 850 Pro 256GB $146
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $185SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $79G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $42Corsair Vengeance LPX DDR4 3200 C16 2x8GB $206SanDisk Extreme 16GB $18
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