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

6 Cores, 12 Threads
@3.6GHz Zen (2017)

Real World Speed
Performance profile from 25,442 user samples
6,586 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 87% Base clock 2.8 GHz, turbo 1.4 GHz (avg)
Poor: 87% Great: 96%
SPEED RANK: 25th / 1052
Gaming 92%
Nuclear submarine
Desktop 89%
Aircraft carrier
Workstation 67%
Battle cruiser
18,856 User Benchmarks
Best Bench: 96% Base clock 3.6 GHz, turbo 4.15 GHz (avg)
Worst Bench: 62% Base clock 3.6 GHz, turbo 0.55 GHz (avg)
Poor: 62% Great: 96%
SPEED RANK: 37th / 1052
Gaming 86%
Aircraft carrier
Desktop 84%
Aircraft carrier
Workstation 78%
Effective Speed
Effective CPU Speed
92.6 % Slightly faster effective speed.
86.4 %
SC Mixed
Avg. Single Core Mixed Speed
121 Pts Slightly faster single-core speed.
109 Pts
QC Mixed
Avg. Quad Core Mixed Speed
470 Pts Slightly faster quad-core speed.
418 Pts
MC Mixed
Avg. Multi Core Mixed Speed
686 Pts 896 Pts Much faster multi-core speed.
SC Mixed
OC Single Core Mixed Speed
126 Pts Slightly faster OC single-core speed.
118 Pts
QC Mixed
OC Quad Core Mixed Speed
488 Pts +4% 469 Pts
MC Mixed
OC Multi Core Mixed Speed
724 Pts 1007 Pts Much faster OC multi-core speed.
Market Share
Based on 7,873,973 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.7 % 0.76 % Slightly higher market share.
Value For Money
111 % Slightly better value.
99.6 %
User Rating
UBM User Rating
113 % Slightly more popular.
102 %
Price (score)
$179 Slightly cheaper.
5 Months Much more recent.
11 Months
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
95 Watts
CPU Processing Cores
6 cores 6 cores
CPU Processing Threads
6 threads 12 threads Hugely higher thread count.
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
2.8 GHz 3.6 GHz Faster base frequency.
Turbo Clock
Turbo Clock Speed
4 GHz 4 GHz
SC Int
Single Core Integer Speed
122 Pts Slightly faster single-core int speed.
114 Pts
SC Float
Single Core Floating Point Speed
129 Pts +5% 123 Pts
QC Int
Quad Core Integer Speed
476 Pts Slightly faster quad-core int speed.
451 Pts
QC Float
Quad Core Floating Point Speed
504 Pts +3% 487 Pts
MC Int
Multi Core Integer Speed
703 Pts 977 Pts Much faster multi-core int speed.
MC Float
Multi Core Floating Point Speed
746 Pts 1014 Pts Much faster multi-core fp speed.
CPU Architecture
Coffee Lake (2017) Zen (2017)
Motherboard Socket
Integrated Graphics
UHD 630 None

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]


The Ryzen 5 1600X is the flagship processor from AMD's latest generation of Ryzen 5 processors which feature the Zen architecture. Following on from last month's release of the Ryzen 7 series, the Ryzen 5 series is positioned as a less expensive mid-performance alternative to Intel's i5 mainstream offerings. Once again, AMD excels in multi-core technology. Like the Ryzen 5 1600, the 1600X features 6 cores and 12 threads, but has roughly 11% higher clock speeds (out of the box) for a 14% premium. Like all Ryzen CPUs the 1600X is unlocked. The 1600X is the only Ryzen 5 CPU with a TDP of 95W, the 1600, 1500X and 1400 all have 50% lower power consumption of 65W. Due to its high thread count, UserBenchmarks show that at stock clocks the 1600X outperforms the i7-7700k on multi-threaded tasks by 23%, but it lags behind by 23% for single and 14% for quad-core performance. The 1600X is priced keenly at $249 so a more appropriate CPU comparison is the i5-7600k where the 1600X wins on stock multi-core by a whopping 81%. The 1600X does represent great value for workstation users that also game but its $30 cheaper sibling, the 1600 (non x version), which includes a cooler and has great overclocking potential out of the box is arguably the the value king in this segment. [Apr '17 CPUPro]


Processor Rankings (Price vs Performance) March 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]


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.
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.

UserBenchmark of the month

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
  • - 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.

 Frequently Asked Questions

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Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $139
AMD Ryzen 5 1600 $189AMD RX 480 $400Samsung 850 Pro 256GB $140
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $198SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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