IntelBX80684I58600K
IntelBX80646I74790K

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

Real World Speed
Performance profile from 124,295 user samples
6,027 User Benchmarks
Best Bench: 121% Base clock 3.6 GHz, turbo 5.2 GHz (avg)
Worst Bench: 94% Base clock 3.6 GHz, turbo 4.05 GHz (avg)
Poor: 94% Great: 121%
SPEED RANK: 8th / 980
Gaming
Gaming 104%
UFO
Desktop
Desktop 100%
UFO
Workstation
Workstation 76%
Battleship
118,268 User Benchmarks
Best Bench: 101% Base clock 4 GHz
Worst Bench: 74% Base clock 4 GHz, turbo 0.8 GHz (avg)
Poor: 74% Great: 101%
SPEED RANK: 29th / 980
Gaming
Gaming 88%
Aircraft carrier
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
104 % Faster effective speed.
+18%
88.4 % -18%
SC Mixed
Avg. Single Core Mixed Speed
135 Pts Slightly faster single-core speed.
+8%
125 Pts -8%
QC Mixed
Avg. Quad Core Mixed Speed
532 Pts Faster quad-core speed.
+23%
433 Pts -23%
MC Mixed
Avg. Multi Core Mixed Speed
778 Pts Faster multi-core speed.
+21%
644 Pts -21%
SC Mixed
OC Single Core Mixed Speed
156 Pts Slightly faster OC single-core speed.
+11%
140 Pts -11%
QC Mixed
OC Quad Core Mixed Speed
619 Pts Faster OC quad-core speed.
+20%
517 Pts -20%
MC Mixed
OC Multi Core Mixed Speed
916 Pts Faster OC multi-core speed.
+26%
726 Pts -26%
Market Share
Based on 6,870,473 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.05 % -61% 1.69 % Much higher market share.
+61%
Value
Value For Money
109 % Much better value.
+33%
81.7 % -33%
User Rating
UBM User Rating
78 % -28% 100 % More popular.
+28%
Price
Price (score)
$260 Cheaper.
+28%
$360 -28%
Age
Newest
3 Months Hugely more recent.
+93%
43 Months -93%
TDP
Thermal Design Power (TDP)
95 Watts -7% 88 Watts Slightly more energy efficient.
+7%
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores -50%
Threads
CPU Processing Threads
6 threads -33% 8 threads Much higher thread count.
+33%
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+36%
22 nm -36%
Base Clock
Base Clock Speed
3.6 GHz -11% 4 GHz Slightly faster base frequency.
+11%
Turbo Clock
Turbo Clock Speed
4.3 GHz -2% 4.4 GHz +2%
SC Int
Single Core Integer Speed
152 Pts Slightly faster single-core int speed.
+9%
139 Pts -9%
SC Float
Single Core Floating Point Speed
162 Pts Faster single-core fp speed.
+17%
139 Pts -17%
QC Int
Quad Core Integer Speed
606 Pts Faster quad-core int speed.
+18%
515 Pts -18%
QC Float
Quad Core Floating Point Speed
644 Pts Faster quad-core fp speed.
+25%
516 Pts -25%
MC Int
Multi Core Integer Speed
887 Pts Faster multi-core int speed.
+29%
690 Pts -29%
MC Float
Multi Core Floating Point Speed
950 Pts Faster multi-core fp speed.
+29%
739 Pts -29%
Series
CPU Architecture
Coffee Lake (2017) Haswell (2013)
Socket
Motherboard Socket
FCLGA1151 FCLGA1150
Graphics
Integrated Graphics
UHD 630 HD 4600
Launch Date
Launch Date
Q4'17 Q2'14
Cache
Cache
9 MB 8 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
N/A $339.00 - $350.00
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI2
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (130W) PCG 2013D
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 4600
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.25 GHz
Graphics Video Max Memory
Graphics Video Max Memory
64 GB 2 GB
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
No Yes
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
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]

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The Intel Core i7-4790K, codenamed Devil's Canyon, is an upgraded 4770K, Intel's current flagship i7. The 4790K features an improved thermal interface which enables it to dissipate heat more efficiently than the 4770K. Comparing the 4770K and 4790K shows that stock performance has improved by 13% which is consistent with the base clock jump from 3.5 GHz to 4.0 GHz. OC performance remains unchanged. Comparing the 4790K and 4790 shows that at stock clocks the 4790K is around 16% faster which considering the small price difference makes the 4790K a far better choice. Previously Intel targeted the unlocked K versions at overclockers but with Devil's Canyon they have included VT-d on the K chip and this time it's squarely aimed at both power users and overclockers alike. Until the release of Broadwell in six months, the 4790K is the high end CPU of choice. [Jul '14 CPUPro]

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Processor Rankings (Price vs Performance) January 2018 CPU Rankings.

Welcome to our desktop CPU comparison. We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by price to yield a value for money rating which is geared towards gamers. Calculated values don't always paint the whole picture so we check them against hundreds of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top CPUs. [CPUPro]

How Fast Is Your CPU? (Bench your build) Size up your PC in less than a minute.

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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How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

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CPUGPUSSD
Intel Core i7-7700K $280Nvidia GTX 1070 $129Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $275Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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