IntelBX80684I78086K
IntelBX80684I58400

6 Cores, 12 Threads @4.00 GHz, Coffee Lake.
Release date ≈ Q2 2018.

6 Cores, 6 Threads @2.8GHz, Coffee Lake.
Release date: Q4 2017.

CSGO
Dust 2 1080p Max
280 EFps Better CSGO EFps.
+20%
233 EFps
GTAV
Franklin & Lamar 1080p Max
110 EFps +3% 107 EFps
Overwatch
Temple of Anubis 1080p Max
138 EFps 138 EFps
PUBG
M249 Training 1080p Max
135 EFps Slightly Better PUBG EFps.
+10%
123 EFps
Fortnite
UserBenchmark Island 1080p Max
133 EFps +2% 130 EFps
Real World Speed
Performance profile from 311,067 user samples
36,783 User Benchmarks
Best Bench: 104% Base clock 4 GHz, turbo 5.15 GHz (avg)
Worst Bench: 81% Base clock 4 GHz, turbo 4.3 GHz (avg)
Poor: 81% Great: 104%
SPEED RANK: 43rd / 1316
Gaming
Gaming 93%
Nuclear submarine
Desktop
Desktop 95%
Nuclear submarine
Workstation
Workstation 84%
Aircraft carrier
274,284 User Benchmarks
Best Bench: 90% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 72% Base clock 2.8 GHz, turbo 1.25 GHz (avg)
Poor: 72% Great: 90%
SPEED RANK: 97th / 1316
Gaming
Gaming 84%
Aircraft carrier
Desktop
Desktop 85%
Aircraft carrier
Workstation
Workstation 69%
Battle cruiser
Effective Speed
Effective CPU Speed
93.3 % Faster effective speed.
+10%
84.5 %
Memory
Avg. Memory Latency
92.3 Pts Slightly lower memory latency.
+5%
87.8 Pts
1-Core
Avg. Single Core Mixed Speed
137 Pts Faster single-core speed.
+20%
114 Pts
2-Core
Avg. Dual Core Mixed Speed
266 Pts Faster dual-core speed.
+17%
227 Pts
4-Core
Avg. Quad Core Mixed Speed
507 Pts Faster quad-core speed.
+15%
440 Pts
8-Core
Avg. Octa Core Mixed Speed
821 Pts Much faster octa-core speed.
+32%
624 Pts
Memory
OC Memory Latency
97.5 Pts +4% 94.2 Pts
1-Core
OC Single Core Mixed Speed
154 Pts Faster OC single-core speed.
+26%
122 Pts
2-Core
OC Dual Core Mixed Speed
306 Pts Faster OC dual-core speed.
+26%
242 Pts
4-Core
OC Quad Core Mixed Speed
605 Pts Faster OC quad-core speed.
+28%
473 Pts
8-Core
OC Octa Core Mixed Speed
971 Pts Much faster OC octa-core speed.
+41%
688 Pts
Market Share
Based on 46,448,143 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.07 % 0.65 % Hugely higher market share.
+829%
Value
Value For Money
72.6 % 96.4 % Much better value.
+33%
User Rating
UBM User Rating
55 % 61 % More popular.
+11%
Price
Price (score)
$692 $172 Much cheaper.
+75%
Age
Newest
39+ Months More recent.
+17%
47 Months
64-Core
OC Multi Core Mixed Speed
1196 Pts Much faster OC 64-core speed.
+73%
692 Pts
64-Core
Avg. Multi Core Mixed Speed
1018 Pts Much faster 64-core speed.
+61%
632 Pts
Launch Date
Launch Date
Q2'18 Q4'17
Cache
Cache
12 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 SSE4.1/4.2, AVX2
Max Turbo Frequency
Max Turbo Frequency
5.00 GHz 4.00 GHz
Thermal Solution Specification
Thermal Solution Specification
PCG 2015D (130W) PCG 2015C (65W)
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.20 GHz 1.05 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
TSX-NI
Intel® TSX-NI
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
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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Intel are celebrating the 40th anniversary of their x86 architecture and 8086 processor with the launch of their high-end i7-8086K. Just 50,000 units of this hex core, twelve threaded Coffee Lake processor have been made available globally. Exactly like the i7-8700K, the 8086K features 12MB of smart (L3) cache, 2 channels of DDR4 RAM and has a TDP of 95W. Essentially, the 8086K is Intel’s current Coffee Lake flagship, the i7-8700K, with a single-core turbo frequency factory overclocked by 300 MHz. Thermals permitting, out of the box, the i7-8086K achieves a single core boost speed of 5.0 GHz – which is a new record for Intel. That said, you would be unlucky if you were unable to achieve a 5.0 GHz single core OC with an 8700K. For everything other than single core, the turbo clock speeds on the 8086K exactly match the 8700K which puts the 8086K firmly into gimmick territory. Directly comparing the 8086K and 8700K shows that for a $100 (24%) price premium you get around a 5% performance improvement which drops to around 2% when both chips are overclocked. If the price gap between the 8086K and the 8700K were to fall to less than 20 USD it may be worth considering the 8086K. [Jun '18 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) September 2021 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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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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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.

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HDDRAMUSB
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