IntelBX80684I58400
IntelBX80684I38350K

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

4 Cores, 4 Threads @4.0GHz, Coffee Lake.
Release date: Q3 2017.

Real World Speed
Performance profile from 45,626 user samples
40,070 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 80% Base clock 2.8 GHz, turbo 2.8 GHz (avg)
Poor: 80% Great: 94%
SPEED RANK: 33rd / 1129
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 65%
Destroyer
5,556 User Benchmarks
Best Bench: 110% Base clock 4 GHz, turbo 5 GHz (avg)
Worst Bench: 79% Base clock 4 GHz, turbo 2.8 GHz (avg)
Poor: 79% Great: 110%
SPEED RANK: 27th / 1129
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 90%
Nuclear submarine
Workstation
Workstation 56%
Gunboat
Effective Speed
Effective CPU Speed
89 % 92.3 % +4%
SC Mixed
Avg. Single Core Mixed Speed
117 Pts 127 Pts Slightly faster single-core speed.
+9%
QC Mixed
Avg. Quad Core Mixed Speed
452 Pts 478 Pts Slightly faster quad-core speed.
+6%
MC Mixed
Avg. Multi Core Mixed Speed
654 Pts Much faster multi-core speed.
+35%
486 Pts
SC Mixed
OC Single Core Mixed Speed
122 Pts 150 Pts Faster OC single-core speed.
+23%
QC Mixed
OC Quad Core Mixed Speed
477 Pts 576 Pts Faster OC quad-core speed.
+21%
MC Mixed
OC Multi Core Mixed Speed
701 Pts Faster OC multi-core speed.
+21%
581 Pts
Market Share
Based on 11,511,820 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.41 % Insanely higher market share.
+1,075%
0.12 %
Value
Value For Money
97.2 % 113 % Better value.
+17%
User Rating
UBM User Rating
115 % Much more popular.
+74%
66 %
Price
Price (score)
$231 $169 Cheaper.
+27%
Age
Newest
12 Months Slightly more recent.
+8%
13 Months
TDP
Thermal Design Power (TDP)
65 Watts More energy efficient.
+29%
91 Watts
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores
Threads
CPU Processing Threads
6 threads Much higher thread count.
+50%
4 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
2.8 GHz 4 GHz Much faster base frequency.
+43%
Turbo Clock
Turbo Clock Speed
4 GHz 4 GHz
SC Int
Single Core Integer Speed
118 Pts 144 Pts Faster single-core int speed.
+22%
SC Float
Single Core Floating Point Speed
127 Pts 156 Pts Faster single-core fp speed.
+23%
QC Int
Quad Core Integer Speed
460 Pts 547 Pts Faster quad-core int speed.
+19%
QC Float
Quad Core Floating Point Speed
499 Pts 616 Pts Faster quad-core fp speed.
+23%
MC Int
Multi Core Integer Speed
676 Pts Faster multi-core int speed.
+22%
556 Pts
MC Float
Multi Core Floating Point Speed
739 Pts Faster multi-core fp speed.
+20%
618 Pts
Series
CPU Architecture
Coffee Lake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 UHD 630
Cache
Cache
9 MB 8 MB
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) PCG 2015C (130W)
Memory Types
Memory Types
DDR4-2666 DDR4-2400
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.05 GHz 1.15 GHz
Turbo Boost Tech
Intel® Turbo Boost Technology
2.0 No

More specs » More specs »
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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 quad core i3-8350K hails from Intel’s most recent (and as yet unreleased) generation of Coffee Lake processors. It has a stock clock of 4.0 GHz, 8MB of cache and a TDP of 95W. The 8350K is the first i3 processor to feature four cores (previous generations of i3s had two cores and four threads). With this eighth generation of processors, Intel has introduced a step change in their nomenclature which witnesses the old quad core i5s become the new quad core i3s. Our benchmarks show a 25% increase in effective speed between generations of i3 8350K vs 7350K and near equivalence between the outgoing i5-7600K and the new i3-8350K. Although the price points of Coffee Lake are not yet known, if Intel keep them roughly in line with the previous generations (i3 ~= $140) this will represent the best improvement in value for money since Sandy Bridge as the 8350K at $140 would be 34.8% cheaper than a 7600K at $215. Cynics among us will see this as an effort to fend off competition from AMD’s new multi-core Ryzen processors. It appears Intel may have been successful with this move as early benchmarks from the 8350K suggest that it beats the more expensive 8 core Ryzen 7 1700 in single and quad core performance by 25%. The 8350K is a great choice for gaming builds, but the budget will also need to factor in a complementary motherboard based on the new 300 series chipset. Expect the quad core i3-8100 which is the 8350K’s little sister featuring a base clock of 3.6 GHz, to follow shortly. [Aug '17 CPUPro]

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Processor Rankings (Price vs Performance) October 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.
  • 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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CPUGPUSSD
Intel Core i7-8700K $370Nvidia GTX 1070 $360Samsung 850 Evo 250GB $78
AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $120
Intel Core i7-7700K $355AMD RX 480 $280Samsung 850 Pro 256GB $163
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Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $147SanDisk Extreme 64GB $42
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $145SanDisk Ultra Fit 32GB $12
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