IntelBX80646I74790
IntelBX80684I58400

4 Cores, 8 Threads @3.6GHz, Haswell.
Release date: Q2 2014.

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

Real World Speed
Performance profile from 506,051 user samples
244,771 User Benchmarks
Best Bench: 85% Base clock 3.6 GHz, turbo 4 GHz (avg)
Worst Bench: 65% Base clock 3.6 GHz, turbo 3.8 GHz (avg)
Poor: 65% Great: 85%
SPEED RANK: 196th / 1316
Gaming
Gaming 77%
Battleship
Desktop
Desktop 80%
Battleship
Workstation
Workstation 63%
Destroyer
261,280 User Benchmarks
Best Bench: 90% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 72% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 72% Great: 90%
SPEED RANK: 97th / 1316
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 70%
Battle cruiser
Effective Speed
Effective CPU Speed
76.5 % 84.6 % Faster effective speed.
+11%
Memory
Avg. Memory Latency
85.2 Pts 88.3 Pts +4%
1-Core
Avg. Single Core Mixed Speed
108 Pts 114 Pts Slightly faster single-core speed.
+6%
2-Core
Avg. Dual Core Mixed Speed
208 Pts 226 Pts Slightly faster dual-core speed.
+9%
4-Core
Avg. Quad Core Mixed Speed
368 Pts 439 Pts Faster quad-core speed.
+19%
8-Core
Avg. Octa Core Mixed Speed
547 Pts 625 Pts Faster octa-core speed.
+14%
Memory
OC Memory Latency
94.2 Pts 94.7 Pts +1%
1-Core
OC Single Core Mixed Speed
117 Pts 121 Pts +3%
2-Core
OC Dual Core Mixed Speed
233 Pts 241 Pts +3%
4-Core
OC Quad Core Mixed Speed
437 Pts 473 Pts Slightly faster OC quad-core speed.
+8%
8-Core
OC Octa Core Mixed Speed
595 Pts 687 Pts Faster OC octa-core speed.
+15%
Market Share
Based on 45,017,184 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.59 % 0.7 % Higher market share.
+19%
Value
Value For Money
80 % 96.6 % Better value.
+21%
User Rating
UBM User Rating
60 % 61 % +2%
Price
Price (score)
$236 $172 Cheaper.
+27%
Age
Newest
86 Months 45 Months Much more recent.
+48%
TDP
Thermal Design Power (TDP)
84 Watts 65 Watts More energy efficient.
+23%
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads Much higher thread count.
+33%
6 threads
Lithography
Manufacturing process
22 nm 14 nm Much newer manufacturing.
+36%
Base Clock
Base Clock Speed
3.6 GHz Faster base frequency.
+29%
2.8 GHz
Turbo Clock
Turbo Clock Speed
4 GHz 4 GHz
64-Core
OC Multi Core Mixed Speed
596 Pts 693 Pts Faster OC 64-core speed.
+16%
64-Core
Avg. Multi Core Mixed Speed
553 Pts 629 Pts Faster 64-core speed.
+14%
Series
CPU Architecture
Haswell Coffee Lake
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
$303.00 - $312.00 N/A
Max Turbo Frequency
Max Turbo Frequency
4 GHz 4.00 GHz
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
1.2 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
vPro Tech
Intel® vPro™ Technology ‡
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 Revision
PCI Express Revision
Up to 3.0 3.0
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 Core i7-4790 is the third upgrade to Intel's flagship quad core hyper-threaded CPU. This version, like its predecessor the i7-4771, gets a 100 MHz bump in stock frequency and additionally the i7-4790 also gets a 100 MHz turbo frequency bump. These improvements (~4%) are marginal and practically impossible to discern in day to day use. Looking at a benchmark comparison between the 4771 and 4790 verifies that there is little difference between the two CPUs. Although the i7-4790 isn't much of a step forward, it's still one of the best (locked) mainstream processors on the market. AMD hasn't been able to compete with Intel on single threaded performance for several years, consequently Intel have no need to push the envelope. Overclockers should wait for the 4790K which is rumoured to be released shortly. [May '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) July 2021 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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.
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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.

 Frequently Asked Questions

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