COMPARE
CPU
RANKINGS
TEST
YOUR CPU
ADD TO PC
BUILD
Intel
IntelBX80662I56600K
▲ 5135 ▼

4 Cores, 8 Threads @3.5 GHz, Ivy Bridge.
Release date ≤ Q1 2014.

VS
▲ 7428,950 ▼

4 Cores, 4 Threads @3.5GHz, Skylake.
Release date: Q3 2015.

Effective Speed 
+3%
Real World Speed
Performance profile from 342,705 user samples
Benchmark your CPU here
461 User Benchmarks
Best Bench: 82% Base clock 3.5 GHz, turbo 3.75 GHz (avg)
Worst Bench: 65% Base clock 3.5 GHz
Poor: 65% Great: 82%
SPEED RANK: 326th / 1456
Gaming
Gaming 74%
Battleship
Desktop
Desktop 78%
Battleship
Workstation
Workstation 59%
Gunboat
342,244 User Benchmarks
Best Bench: 85% Base clock 3.5 GHz, turbo 4.7 GHz (avg)
Worst Bench: 57% Base clock 3.5 GHz, turbo 3.55 GHz (avg)
Poor: 57% Great: 85%
SPEED RANK: 363rd / 1456
Gaming
Gaming 72%
Battleship
Desktop
Desktop 80%
Battleship
Workstation
Workstation 55%
Yacht
Effective Speed
Effective CPU Speed 		74.2 % +3% 72.4 %
Average Score 
+1%
Memory
Avg. Memory Latency 		86.6 Pts +4% 83.3 Pts
1-Core
Avg. Single Core Speed 		100 Pts 110 Pts Slightly faster single-core speed.
+10%
2-Core
Avg. Dual Core Speed 		194 Pts 218 Pts Faster dual-core speed.
+12%
4-Core
Avg. Quad Core Speed 		338 Pts 352 Pts +4%
8-Core
Avg. Octa Core Speed 		481 Pts Faster octa-core speed.
+29% 		373 Pts
Overclocked Score 
+11%
Memory
OC Memory Latency 		94.4 Pts 95.2 Pts +1%
1-Core
OC Single Core Speed 		108 Pts 136 Pts Faster OC single-core speed.
+26%
2-Core
OC Dual Core Speed 		215 Pts 269 Pts Faster OC dual-core speed.
+25%
4-Core
OC Quad Core Speed 		403 Pts 455 Pts Faster OC quad-core speed.
+13%
8-Core
OC Octa Core Speed 		522 Pts Slightly faster OC octa-core speed.
+10% 		476 Pts
Value & Sentiment 
+1,252%
Market Share
Based on 68,125,214 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.49 % Insanely higher market share.
+4,800%
Value
Value For Money 		67.1 % 117 % Much better value.
+74%
User Rating
UBM User Rating 		51 % 74 % Much more popular.
+45%
Price
Price (score) 		$400 $49 Hugely cheaper.
+88%
Nice To Haves 
+8%
Age
Newest 		124+ Months 106 Months More recent.
+15%
64-Core
OC Multi Core Speed 		524 Pts Slightly faster OC 64-core speed.
+8% 		484 Pts
64-Core
Avg. Multi Core Speed 		489 Pts Faster 64-core speed.
+29% 		378 Pts
Specifications 
Launch Date
Launch Date 		Q2'12 Q3'15
Cache
Cache 		8 MB SmartCache 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions 		SSE4.1/4.2, AVX SSE4.1/4.2, AVX 2.0
Embedded Options Available
Embedded Options Available 		Yes No
Lithography
Lithography 		22 nm 14 nm
Recommended Price
Recommended Customer Price 		$329.00 - $350.00 $242.00 - $243.00
Bus Speed
Bus Speed 		5 GT/s DMI 8 GT/s DMI3
Max Memory Size
Max Memory Size (dependent on memory type) 		32 GB 64 GB
Memory Types
Memory Types 		DDR3 1333/1600 DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
Memory Bandwidth
Max Memory Bandwidth 		25.6 GB/s 34.1 GB/s
ECC Memory Supported
ECC Memory Supported ‡ 		Yes No
Processor Graphics
Processor Graphics ‡ 		Intel® HD Graphics P4000 Intel® HD Graphics 530
Graphics Base Frequency
Graphics Base Frequency 		650 MHz 350 MHz
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency 		1.25 GHz 1.15 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡ 		Yes No
TSX-NI
Intel® TSX-NI 		No Yes
vPro Tech
Intel® vPro™ Technology ‡ 		Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡ 		Yes No
PCI Express Configurations
PCI Express Configurations ‡ 		1x16 & 1x4, 2x8 & 1x4 or 1x8 & 3x4 Up to 1x16, 2x8, 1x8+2x4

More specs » More specs »
Conclusion 
Average Bench 74.2%
Average Bench 72.4%
ADVERTISEMENT

The Intel Core i5-6600K is based on the new "Skylake" 14nm manufacturing process. Sporting 4 physical cores with base/turbo clocks of 3.5/3.9 GHz the 6600K and its predecessor, the 4690K share the same basic configuration and disappointingly, offer similar performance. Comparing the 6600K and 6700K shows that the 6700K has faster multi and single core performance. The improved multi core performance is due to Hyperthreading which is the key differentiator for the i7-6700K. The gap in single core performance can largely be eliminated by overclocking the i5-6600K so although the stock effective speed is significantly higher on the 6700K, this gap diminishes significantly when both processors are overclocked. At a 30% discount, the 6600K is the better value gaming CPU. [Aug '15 CPUPro]

MORE DETAILS

User Builds 
461
342,244
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) June 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]

ADVERTISEMENT

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 popular with 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 $160Nvidia RTX 4060 $290WD Black SN850X M.2 2TB $160
Intel Core i5-13600K $260Nvidia RTX 4060-Ti $388WD Black SN850X M.2 1TB $79
Intel Core i5-12400F $110Nvidia RTX 4070 $520Crucial T700 M.2 4TB $353
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