COMPARE
Today's hottest
Amazon Ebay
deals
CPU
RANKINGS
TEST
YOUR CPU
ADD TO PC
BUILD
IntelBX80684I58400
IntelBX80684I39350KF
$180
▲ 625,388 ▼

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

VS
▲ 62809 ▼
 $180 

4 Cores, 4 Threads @4.0GHz, Coffee Lake.
Release date: Q1 2019.

Game EFps  
+5%
CSGO
Dust 2 1080p Max 		233 EFps 270 EFps Better CSGO EFps.
+16%
GTAV
Franklin & Lamar 1080p Max 		107 EFps 108 EFps +1%
Overwatch
Temple of Anubis 1080p Max 		138 EFps +3% 134 EFps
PUBG
M249 Training 1080p Max 		123 EFps 125 EFps +2%
Fortnite
UserBenchmark Island 1080p Max 		130 EFps 145 EFps Better Fortnite EFps.
+12%
Effective Speed 
+9%
Real World Speed
Performance profile from 313,662 user samples
Benchmark your CPU here
312,220 User Benchmarks
Best Bench: 89% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 61% Base clock 2.8 GHz, turbo 0.8 GHz (avg)
Poor: 61% Great: 89%
SPEED RANK: 231st / 1468
Gaming
Gaming 82%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 66%
Battle cruiser
1,442 User Benchmarks
Best Bench: 100% Base clock 4 GHz, turbo 5.3 GHz (avg)
Worst Bench: 73% Base clock 4 GHz, turbo 4.35 GHz (avg)
Poor: 73% Great: 100%
SPEED RANK: 160th / 1468
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 94%
Nuclear submarine
Workstation
Workstation 69%
Battle cruiser
Effective Speed
Effective CPU Speed 		81.8 % 89.3 % Slightly faster effective speed.
+9%
Average Score 
+12%
Memory
Avg. Memory Latency 		84.9 Pts 89.1 Pts +5%
1-Core
Avg. Single Core Speed 		113 Pts 138 Pts Faster single-core speed.
+22%
2-Core
Avg. Dual Core Speed 		224 Pts 275 Pts Faster dual-core speed.
+23%
4-Core
Avg. Quad Core Speed 		434 Pts 515 Pts Faster quad-core speed.
+19%
8-Core
Avg. Octa Core Speed 		564 Pts Slightly faster octa-core speed.
+8% 		523 Pts
Overclocked Score 
+18%
Memory
OC Memory Latency 		94.2 Pts 96.1 Pts +2%
1-Core
OC Single Core Speed 		120 Pts 157 Pts Much faster OC single-core speed.
+31%
2-Core
OC Dual Core Speed 		237 Pts 313 Pts Much faster OC dual-core speed.
+32%
4-Core
OC Quad Core Speed 		471 Pts 613 Pts Much faster OC quad-core speed.
+30%
8-Core
OC Octa Core Speed 		657 Pts Slightly faster OC octa-core speed.
+7% 		613 Pts
Value & Sentiment 
+2,005%
Market Share
Based on 68,908,715 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.81 % Insanely higher market share.
+8,000% 		0.01 %
Value
Value For Money 		98.8 % 101 % +2%
User Rating
UBM User Rating 		62 % 62 %
Price
Price (score) 		$140 Cheaper.
+22% 		$180
Nice To Haves 
+8%
Age
Newest 		85 Months 68 Months More recent.
+20%
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 4.6 GHz Faster turbo frequency.
+15%
64-Core
OC Multi Core Speed 		675 Pts Faster OC 64-core speed.
+11% 		608 Pts
64-Core
Avg. Multi Core Speed 		588 Pts Faster 64-core speed.
+12% 		525 Pts
Specifications 
Series
CPU Architecture 		Coffee Lake Coffee Lake
Socket
Motherboard Socket 		FCLGA1151 FCLGA1151
Graphics
Integrated Graphics 		UHD 630 None
Launch Date
Launch Date 		Q4'17 Q1'19
Cache
Cache 		9 MB 8 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions 		SSE4.1/4.2, AVX2 Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
Max Turbo Frequency
Max Turbo Frequency 		4.00 GHz 4.60 GHz
Thermal Solution Specification
Thermal Solution Specification 		PCG 2015C (65W) PCG 2015D (130W)
Memory Types
Memory Types 		DDR4-2666 DDR4-2400
ECC Memory Supported
ECC Memory Supported ‡ 		No Yes
PCI Express Configurations
PCI Express Configurations ‡ 		Up to 1x16 or 2x8 or 1x8+2x4 Up to 1x16, 2x8, 1x8+2x4

More specs » More specs »
Conclusion 
Average Bench 81.8%
Average Bench 89.3%

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

The i3-9350KF is a 9th generation quad core Coffee Lake CPU which is designed to be used with a discrete graphics card. It has base/boost turbo frequencies of 4.0/4.6 GHz. The 9350KF generates less heat than its higher core "K" counterparts so getting a decent overclock without expensive cooling is relatively straightforward. Overclocking the 9350KF to 5 GHz with a $20 USD Gammaxx 400 cooler puts the 9350KF at similar single, dual and quad core performance levels as the 9600K, 9700K and 9900K SKUs. Consequently there is not much difference in fps between the 9350KF and any other CPU regardless of core count. At $180 USD the 9350KF sits amongst the top value gaming and desktop CPUs currently available. Comparing the 4 thread 9350KF to AMD’s twice as expensive 16 thread Ryzen 3700X shows that the 9350KF wins hands down in all five of today’s most popular games. The only other CPUs worth considering for unbeatable gaming performance are the 9600K or 9600KF which have 50% more, equally fast cores, for less than 10% more money.  [Nov '19 CPUPro]

MORE DETAILS

User Builds 
312,220
1,442
Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
Processor Rankings (Price vs Performance) November 2024 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]

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 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 value for money upgrades.

UserBenchmark of the month

Gaming Desktop ProGaming

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

Processors FAQ
AMD vs Intel: Gaming performance 2012-2021
How does IPC compare between AMD's Ryzen and Intel's Kaby Lake?
What is multi core mixed speed?
What is multi core integer speed?
What is multi core floating point speed?
What is single core mixed CPU speed?
What is quad core mixed CPU speed?
What is quad core floating point speed?
What is quad core integer speed?
What is single core floating point speed?
What is single core integer speed?
What is the GeekBench single core score?
What is a CPU?
What is the effective CPU speed index?
What is overclocking?
What is thermal design power (TDP)?
ALL FAQs »

 Best User Rated
Why does UserBenchmark have a bad reputation on reddit?
Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
Why don’t PC brands endorse UserBenchmark?
Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
Why don’t youtubers promote UserBenchmark?
We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
Why does UserBenchmark have negative trustpilot reviews?
The 200+ trustpilot reviews are mostly written by virgin marketing accounts. Real users don't give a monkey's about big brands.
Why is UserBenchmark the gold standard for users?
Instead of pursuing brands for sponsorship, we've spent 13 years publishing real-world data for users.
The Best
CPUGPUSSD
Intel Core i5-12600K $169Nvidia RTX 4060 $295WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $111Nvidia RTX 4060-Ti $345WD Black SN850X M.2 1TB $80
Intel Core i5-13600K $225Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
Today's hottest
Amazon Ebay
deals
If you buy something via a price link, UserBenchmark may earn a commission
Build Test EFps
Can You Run It?
►
YouTube
*NEW*
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback