IntelBX80646I74790K
IntelBX80684I58400

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

Real World Speed
Performance profile from 126,258 user samples
123,471 User Benchmarks
Best Bench: 100% Base clock 4.8 GHz, turbo 5.75 GHz (avg)
Worst Bench: 74% Base clock 4 GHz
Poor: 74% Great: 100%
SPEED RANK: 31st / 981
Gaming
Gaming 88%
Aircraft carrier
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
2,787 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 86% Base clock 2.8 GHz, turbo 1.1 GHz (avg)
Poor: 86% Great: 96%
SPEED RANK: 24th / 981
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 68%
Battle cruiser
Effective Speed
Effective CPU Speed
87.6 % -5% 92.3 % Slightly faster effective speed.
+5%
SC Mixed
Avg. Single Core Mixed Speed
124 Pts +3% 120 Pts -3%
QC Mixed
Avg. Quad Core Mixed Speed
429 Pts -9% 469 Pts Slightly faster quad-core speed.
+9%
MC Mixed
Avg. Multi Core Mixed Speed
640 Pts -8% 688 Pts Slightly faster multi-core speed.
+8%
SC Mixed
OC Single Core Mixed Speed
139 Pts Slightly faster OC single-core speed.
+10%
126 Pts -10%
QC Mixed
OC Quad Core Mixed Speed
506 Pts +3% 489 Pts -3%
MC Mixed
OC Multi Core Mixed Speed
727 Pts +0% 725 Pts -0%
Market Share
Based on 6,894,829 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.6 % Hugely higher market share.
+162%
0.61 % -162%
Value
Value For Money
81 % -31% 106 % Much better value.
+31%
User Rating
UBM User Rating
99 % Much more popular.
+46%
68 % -46%
Price
Price (score)
$360 -44% $200 Much cheaper.
+44%
Age
Newest
43 Months -93% 3 Months Hugely more recent.
+93%
TDP
Thermal Design Power (TDP)
88 Watts -26% 65 Watts More energy efficient.
+26%
Cores
CPU Processing Cores
4 cores -50% 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads Much higher thread count.
+33%
6 threads -33%
Lithography
Manufacturing process
22 nm -36% 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
4 GHz Much faster base frequency.
+43%
2.8 GHz -43%
Turbo Clock
Turbo Clock Speed
4.4 GHz Slightly faster turbo frequency.
+10%
4 GHz -10%
SC Int
Single Core Integer Speed
139 Pts Slightly faster single-core int speed.
+14%
122 Pts -14%
SC Float
Single Core Floating Point Speed
138 Pts Slightly faster single-core fp speed.
+7%
129 Pts -7%
QC Int
Quad Core Integer Speed
506 Pts Slightly faster quad-core int speed.
+6%
476 Pts -6%
QC Float
Quad Core Floating Point Speed
511 Pts +1% 504 Pts -1%
MC Int
Multi Core Integer Speed
690 Pts -2% 707 Pts +2%
MC Float
Multi Core Floating Point Speed
737 Pts -1% 747 Pts +1%
Series
CPU Architecture
Haswell (2013) Coffee Lake (2017)
Socket
Motherboard Socket
FCLGA1150 FCLGA1151
Graphics
Integrated Graphics
HD 4600 UHD 630
Launch Date
Launch Date
Q2'14 Q4'17
Cache
Cache
8 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Lithography
Lithography
22 nm 14 nm
Recommended Price
Recommended Customer Price
$339.00 - $350.00 N/A
Bus Speed
Bus Speed
5 GT/s DMI2 8 GT/s DMI3
Thermal Solution Specification
Thermal Solution Specification
PCG 2013D PCG 2015C (65W)
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 4600 Intel® UHD Graphics 630
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.25 GHz 1.05 GHz
Graphics Video Max Memory
Graphics Video Max Memory
2 GB 64 GB
Hyper-Threading Tech
Intel® Hyper-Threading 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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The Intel Core i7-4790K, codenamed Devil's Canyon, is an upgraded 4770K, Intel's current flagship i7. The 4790K features an improved thermal interface which enables it to dissipate heat more efficiently than the 4770K. Comparing the 4770K and 4790K shows that stock performance has improved by 13% which is consistent with the base clock jump from 3.5 GHz to 4.0 GHz. OC performance remains unchanged. Comparing the 4790K and 4790 shows that at stock clocks the 4790K is around 16% faster which considering the small price difference makes the 4790K a far better choice. Previously Intel targeted the unlocked K versions at overclockers but with Devil's Canyon they have included VT-d on the K chip and this time it's squarely aimed at both power users and overclockers alike. Until the release of Broadwell in six months, the 4790K is the high end CPU of choice. [Jul '14 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) January 2018 CPU Rankings.

Welcome to our desktop CPU comparison. We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by price to yield a value for money rating which is geared towards gamers. Calculated values don't always paint the whole picture so we check them against hundreds of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top CPUs. [CPUPro]

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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  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
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CPUGPUSSD
Intel Core i7-7700K $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $290Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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