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 31,658 user samples
22,034 User Benchmarks
Best Bench: 121% Base clock 3.6 GHz, turbo 5.4 GHz (avg)
Worst Bench: 93% Base clock 3.6 GHz, turbo 1.15 GHz (avg)
Poor: 93% Great: 121%
SPEED RANK: 11th / 1083
Gaming
Gaming 104%
UFO
Desktop
Desktop 100%
UFO
Workstation
Workstation 76%
Battleship
9,624 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 84% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 84% Great: 96%
SPEED RANK: 29th / 1083
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 67%
Battle cruiser
Effective Speed
Effective CPU Speed
104 % Slightly faster effective speed.
+14%
91.9 %
SC Mixed
Avg. Single Core Mixed Speed
136 Pts Slightly faster single-core speed.
+13%
120 Pts
QC Mixed
Avg. Quad Core Mixed Speed
531 Pts Slightly faster quad-core speed.
+14%
466 Pts
MC Mixed
Avg. Multi Core Mixed Speed
772 Pts Slightly faster multi-core speed.
+13%
685 Pts
SC Mixed
OC Single Core Mixed Speed
157 Pts Faster OC single-core speed.
+26%
125 Pts
QC Mixed
OC Quad Core Mixed Speed
618 Pts Faster OC quad-core speed.
+27%
488 Pts
MC Mixed
OC Multi Core Mixed Speed
900 Pts Faster OC multi-core speed.
+24%
724 Pts
Market Share
Based on 8,410,831 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.5 % Much higher market share.
+35%
1.11 %
Value
Value For Money
112 % +2% 110 %
User Rating
UBM User Rating
130 % More popular.
+21%
107 %
Price
Price (score)
$239 $179 Cheaper.
+25%
Age
Newest
6 Months 6 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
152 Pts Faster single-core int speed.
+25%
122 Pts
SC Float
Single Core Floating Point Speed
162 Pts Faster single-core fp speed.
+26%
129 Pts
QC Int
Quad Core Integer Speed
599 Pts Faster quad-core int speed.
+26%
476 Pts
QC Float
Quad Core Floating Point Speed
649 Pts Faster quad-core fp speed.
+29%
504 Pts
MC Int
Multi Core Integer Speed
870 Pts Faster multi-core int speed.
+23%
705 Pts
MC Float
Multi Core Floating Point Speed
956 Pts Faster multi-core fp speed.
+28%
745 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) April 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 $447Samsung 850 Evo 250GB $80
AMD Ryzen 5 1600 $170Nvidia GTX 1060-6GB $310Samsung 850 Evo 500GB $137
Intel Core i7-7700K $290AMD RX 480 $350Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $45
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $204SanDisk Ultra Fit 32GB $12
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