COMPARE
Today's hottest
Amazon Ebay
deals
CPU
RANKINGS
TEST
YOUR CPU
ADD TO PC
BUILD
IntelBX80662I56600K
Intel
▲ 7428,973 ▼

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

VS
▲ 5153 ▼
  

4 Cores, 4 Threads @2.7 GHz, Sandy Bridge.
Release date ≤ Q4 2013.

Effective Speed 
+12%
Real World Speed
Performance profile from 345,275 user samples
Benchmark your CPU here
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: 375th / 1468
Gaming
Gaming 72%
Battleship
Desktop
Desktop 80%
Battleship
Workstation
Workstation 55%
Yacht
3,031 User Benchmarks
Best Bench: 71% Base clock 2.7 GHz, turbo 3.3 GHz (avg)
Worst Bench: 51% Base clock 2.7 GHz, turbo 0.9 GHz (avg)
Poor: 51% Great: 71%
SPEED RANK: 533rd / 1468
Gaming
Gaming 64%
Destroyer
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 47%
Yacht
Effective Speed
Effective CPU Speed 		72.4 % Faster effective speed.
+12% 		64.3 %
Average Score 
+30%
Memory
Avg. Memory Latency 		83.3 Pts 83.7 Pts +0%
1-Core
Avg. Single Core Speed 		110 Pts Much faster single-core speed.
+34% 		81.9 Pts
2-Core
Avg. Dual Core Speed 		218 Pts Much faster dual-core speed.
+42% 		153 Pts
4-Core
Avg. Quad Core Speed 		352 Pts Much faster quad-core speed.
+35% 		261 Pts
8-Core
Avg. Octa Core Speed 		373 Pts Much faster octa-core speed.
+40% 		267 Pts
Overclocked Score 
+42%
Memory
OC Memory Latency 		95.2 Pts +3% 92.3 Pts
1-Core
OC Single Core Speed 		136 Pts Much faster OC single-core speed.
+42% 		95.9 Pts
2-Core
OC Dual Core Speed 		269 Pts Much faster OC dual-core speed.
+48% 		182 Pts
4-Core
OC Quad Core Speed 		455 Pts Much faster OC quad-core speed.
+54% 		296 Pts
8-Core
OC Octa Core Speed 		476 Pts Much faster OC octa-core speed.
+61% 		295 Pts
Value & Sentiment 
+∞%
Market Share
Based on 68,925,168 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.43 % Insanely higher market share.
+∞% 		0 %
User Rating
UBM User Rating 		74 % Much more popular.
+45% 		51 %
Nice To Haves 
+40%
Age
Newest 		111 Months More recent.
+15% 		130+ Months
64-Core
OC Multi Core Speed 		484 Pts Much faster OC 64-core speed.
+64% 		296 Pts
64-Core
Avg. Multi Core Speed 		378 Pts Much faster 64-core speed.
+42% 		267 Pts
Specifications 
Launch Date
Launch Date 		Q3'15 Q1'11
Instruction Set Extensions
Instruction Set Extensions 		SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX
Lithography
Lithography 		14 nm 32 nm
Recommended Price
Recommended Customer Price 		$242.00 - $243.00 $205.00
Max Turbo Frequency
Max Turbo Frequency 		3.9 GHz 3.7 GHz
Bus Speed
Bus Speed 		8 GT/s DMI3 5 GT/s DMI
Max Memory Size
Max Memory Size (dependent on memory type) 		64 GB 32 GB
Memory Types
Memory Types 		DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR3 1066/1333
Memory Bandwidth
Max Memory Bandwidth 		34.1 GB/s 21 GB/s
Processor Graphics
Processor Graphics ‡ 		Intel® HD Graphics 530 Intel® HD Graphics 2000
Graphics Base Frequency
Graphics Base Frequency 		350 MHz 850 MHz
Wireless Display
Intel® Wireless Display 		Yes No
# of Displays Supported
# of Displays Supported ‡ 		3 2
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency 		1.15 GHz 1.1 GHz
vPro Tech
Intel® vPro™ Technology ‡ 		No Yes
Trusted Execution Tech
Intel® Trusted Execution Technology ‡ 		No Yes
PCI Express Revision
PCI Express Revision 		3.0 2.0

More specs » More specs »
Conclusion 
Average Bench 72.4%
Average Bench 64.3%

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 
342,244
3,031
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 $337WD 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