IntelBX80684I58400
AMDYD170XBCAEWOF

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

8 Cores, 16 Threads
@3.4GHz Zen (2017)

Real World Speed
Performance profile from 26,392 user samples
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
21,619 User Benchmarks
Best Bench: 99% Base clock 4.05 GHz, turbo 4.05 GHz (avg)
Worst Bench: 77% Base clock 3.4 GHz, turbo 0.9 GHz (avg)
Poor: 77% Great: 99%
SPEED RANK: 29th / 985
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 95%
Nuclear submarine
Effective Speed
Effective CPU Speed
92.5 % +4% 89 %
SC Mixed
Avg. Single Core Mixed Speed
120 Pts Slightly faster single-core speed.
+13%
106 Pts
QC Mixed
Avg. Quad Core Mixed Speed
471 Pts Slightly faster quad-core speed.
+14%
414 Pts
MC Mixed
Avg. Multi Core Mixed Speed
691 Pts 1177 Pts Much faster multi-core speed.
+70%
SC Mixed
OC Single Core Mixed Speed
126 Pts Slightly faster OC single-core speed.
+9%
116 Pts
QC Mixed
OC Quad Core Mixed Speed
490 Pts Slightly faster OC quad-core speed.
+6%
462 Pts
MC Mixed
OC Multi Core Mixed Speed
729 Pts 1322 Pts Hugely faster OC multi-core speed.
+81%
Market Share
Based on 7,515,518 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.62 % +3% 0.6 %
Value
Value For Money
111 % Better value.
+23%
90.4 %
User Rating
UBM User Rating
113 % More popular.
+15%
98 %
Price
Price (score)
$179 Much cheaper.
+36%
$280
Age
Newest
4 Months Much more recent.
+64%
11 Months
TDP
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
+32%
95 Watts
Cores
CPU Processing Cores
6 cores 8 cores Much higher core count.
+33%
Threads
CPU Processing Threads
6 threads 16 threads Hugely higher thread count.
+167%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
2.8 GHz 3.4 GHz Faster base frequency.
+21%
Turbo Clock
Turbo Clock Speed
4 GHz Slightly faster turbo frequency.
+5%
3.8 GHz
SC Int
Single Core Integer Speed
122 Pts Slightly faster single-core int speed.
+9%
112 Pts
SC Float
Single Core Floating Point Speed
129 Pts Slightly faster single-core fp speed.
+7%
121 Pts
QC Int
Quad Core Integer Speed
478 Pts Slightly faster quad-core int speed.
+7%
446 Pts
QC Float
Quad Core Floating Point Speed
506 Pts Slightly faster quad-core fp speed.
+6%
479 Pts
MC Int
Multi Core Integer Speed
709 Pts 1280 Pts Hugely faster multi-core int speed.
+81%
MC Float
Multi Core Floating Point Speed
752 Pts 1329 Pts Much faster multi-core fp speed.
+77%
Series
CPU Architecture
Coffee Lake (2017) Zen (2017)
Socket
Motherboard Socket
FCLGA1151 AM4
Graphics
Integrated Graphics
UHD 630 None
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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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The AMD Ryzen 7 1700X isn't due for release until next week but two of our users has already submitted benchmarks. Comparing the quad and single core scores from our samples shows a relative 4.3% boost on the single core score so it’s possible that turbo wasn’t fully engaged (12% turbo boost expected). These preliminary results are seriously impressive as they put Zen’s IPC between 0% and 9% below Intel’s Kaby Lake. Even in the worst case scenario these results are still impressive. Comparing Intel’s $1,000 6900K and the 1700X shows that AMD delivers comparable performance for half the price! A shake-up of the CPU market will unfold as Zen rolls out. If Ryzen CPUs can overclock to 4.6+ GHz they will likely dominate the entire market putting a very welcome end to the monotonous tick-tock of recent years. [Feb '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.
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 i7-8700K $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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