IntelBX80684I99900K
IntelBX80684I58400

8 Cores, 16 Threads @3.6GHz, Coffee Lake.
Release date: Q4 2018.

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

Real World Speed
Performance profile from 153,591 user samples
57,308 User Benchmarks
Best Bench: 131% Base clock 2 GHz, turbo 2 GHz (avg)
Worst Bench: 94% Base clock 3.6 GHz, turbo 1.85 GHz (avg)
Poor: 94% Great: 131%
SPEED RANK: 7th / 1159
Gaming
Gaming 120%
UFO
Desktop
Desktop 116%
UFO
Workstation
Workstation 123%
UFO
96,283 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 80% Base clock 2.8 GHz, turbo 2.8 GHz (avg)
Poor: 80% Great: 94%
SPEED RANK: 54th / 1159
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
120 % Much faster effective speed.
+35%
88.8 %
SC Mixed
Avg. Single Core Mixed Speed
145 Pts Faster single-core speed.
+24%
117 Pts
QC Mixed
Avg. Quad Core Mixed Speed
566 Pts Faster quad-core speed.
+25%
451 Pts
MC Mixed
Avg. Multi Core Mixed Speed
1491 Pts Hugely faster multi-core speed.
+130%
649 Pts
SC Mixed
OC Single Core Mixed Speed
156 Pts Faster OC single-core speed.
+28%
122 Pts
QC Mixed
OC Quad Core Mixed Speed
619 Pts Faster OC quad-core speed.
+30%
477 Pts
MC Mixed
OC Multi Core Mixed Speed
1661 Pts Hugely faster OC multi-core speed.
+137%
700 Pts
Market Share
Based on 17,712,986 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.76 % Much higher market share.
+30%
1.35 %
Value
Value For Money
99.3 % 103 % +4%
User Rating
UBM User Rating
73 % 115 % Much more popular.
+58%
Price
Price (score)
$485 $196 Much cheaper.
+60%
Age
Newest
7 Months Much more recent.
+65%
20 Months
TDP
Thermal Design Power (TDP)
95 Watts 65 Watts Much more energy efficient.
+32%
Cores
CPU Processing Cores
8 cores Much higher core count.
+33%
6 cores
Threads
CPU Processing Threads
16 threads Hugely higher thread count.
+167%
6 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.6 GHz Faster base frequency.
+29%
2.8 GHz
Turbo Clock
Turbo Clock Speed
5 GHz Faster turbo frequency.
+25%
4 GHz
SC Int
Single Core Integer Speed
152 Pts Faster single-core int speed.
+29%
118 Pts
SC Float
Single Core Floating Point Speed
161 Pts Faster single-core fp speed.
+26%
128 Pts
QC Int
Quad Core Integer Speed
602 Pts Much faster quad-core int speed.
+31%
461 Pts
QC Float
Quad Core Floating Point Speed
644 Pts Faster quad-core fp speed.
+29%
500 Pts
MC Int
Multi Core Integer Speed
1511 Pts Hugely faster multi-core int speed.
+126%
668 Pts
MC Float
Multi Core Floating Point Speed
1769 Pts Hugely faster multi-core fp speed.
+139%
739 Pts
Series
CPU Architecture
Coffee Lake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 UHD 630
Launch Date
Launch Date
Q4'18 Q4'17
Cache
Cache
16 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 SSE4.1/4.2, AVX2
Recommended Price
Recommended Customer Price
$488.00 - $499.00 N/A
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
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, 2x8, 1x8+2x4 Up to 1x16 or 2x8 or 1x8+2x4

More specs » More specs »
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Intel’s new consumer flagship CPU for 2018 is the i9-9900K, an 8 core, 16 thread, unlocked 9th generation Intel core desktop processor. It is based on the third round of optimization of Intel’s 14nm Coffee Lake architecture, which in this iteration, yields more cores. This is a retort to AMD’s 8 core 16 thread Ryzen 7 processors that launched in Q2 2018, to fill the gap before Intel releases it’s 10nm Cannon Lake based CPUs in, perhaps, late 2019. In direct proportion to the increased number of cores, average multi-core benchmarks are around 33% higher on the 8 core 9900K than the previous generation 6 core 8700K. The i9-9900K has a base frequency of 3.6 GHz, ramping up to an all-core turbo boost frequency of 4.7 GHz and a single-core turbo boost speed of 5.0 GHz (the highest frequency achieved yet from this class of Intel CPU). It features 16 MB of cache, a 95W TDP and Intel UHD graphics 630. The 9900K is compatible with the new Z390 chipset from Intel, and subject to a BIOS update, is also compatible with the Z370 chipset. This premium CPU is expected to retail at $500, which compares to around $300 for the 8 core, 16 thread Ryzen 7 2700X. Although the 9900K has around a 16% effective speed advantage over the 2700X, the Ryzen 2700X offers better value for money for most users. [Oct '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]

MORE DETAILS

Processor Rankings (Price vs Performance) June 2019 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 $365Nvidia GTX 1070 $390Samsung 850 Evo 250GB $85
AMD Ryzen 5 2600 $144Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $100
AMD Ryzen 7 2700X $280Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $79SanDisk Extreme 64GB $128
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $646SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $85SanDisk Ultra Fit 32GB $12
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