COMPARE
Today's hottest
Amazon Ebay
deals
RAM
RANKINGS
TEST
YOUR RAM
ADD TO PC
BUILD
Unknown
CorsairCMK8GX4M2A2666C16
▲ 500 ▼
  

Release date ≈ Q3 2021.

VS
▲ 507 ▼
  

Release date ≤ Q4 2015.

Effective Speed 
+28%
Real World Speed
Performance profile from 17,008 user samples
Benchmark your RAM here
518 User Benchmarks
Best Bench: 127% @ 2667 MHz
Worst Bench: 76% @ 2666 MHz
Poor: 76% Great: 127%
SPEED RANK: 25th / 132
16,490 User Benchmarks
Best Bench: 98% @ 3200 MHz
Worst Bench: 50% @ 2133 MHz
Poor: 50% Great: 98%
SPEED RANK: 84th / 132
Effective Speed
Effective RAM Speed 		97.9 % Faster effective speed.
+28% 		76.3 %
Average Score 
+30%
MC Read
Avg. 16 Core Read Bench 		41.3 GB/s Much faster multi-core read.
+41% 		29.2 GB/s
MC Write
Avg. 16 Core Write Bench 		29.4 GB/s +4% 28.4 GB/s
MC Mixed
Avg. 16 Core Mixed IO Bench 		35.2 GB/s Much faster multi-core mixed.
+44% 		24.5 GB/s
Peak Score 
+35%
MC Read
16 Core Read Bench 		59.1 GB/s Much faster multi-core read.
+55% 		38.2 GB/s
MC Write
16 Core Write Bench 		41.8 GB/s Faster multi-core write.
+14% 		36.8 GB/s
MC Mixed
16 Core Mixed IO Bench 		44.4 GB/s Much faster multi-core mixed.
+37% 		32.4 GB/s
Value & Sentiment 
+50%
Market Share
Based on 68,258,036 RAM Kits tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.02 % Hugely higher market share.
+100%
User Rating
UBM User Rating 		50 % 50 %
Nice To Haves 
+31%
Age
Newest 		40+ Months Much more recent.
+62% 		106+ Months
SC Read
Avg. 1 Core Read Bench 		26.6 GB/s Much faster single-core read.
+46% 		18.2 GB/s
SC Write
Avg. 1 Core Write Bench 		28.4 GB/s +3% 27.5 GB/s
SC Mixed
Avg. 1 Core Mixed IO Bench 		34.2 GB/s Much faster single-core mixed.
+53% 		22.4 GB/s
SC Read
1 Core Read Bench 		32.6 GB/s Faster single-core read.
+28% 		25.4 GB/s
SC Write
1 Core Write Bench 		45.3 GB/s Faster single-core write.
+21% 		37.5 GB/s
SC Mixed
1 Core Mixed IO Bench 		43.7 GB/s Much faster single-core mixed.
+52% 		28.7 GB/s
Latency
Avg. Physical RAM Latency 		72.8 ns Lower access latency.
+10% 		81 ns
Latency
Physical RAM Latency 		56.7 ns +4% 58.9 ns
Specifications 
Capacity
Capacity 		32GB 8GB
User Builds 
518
16,490
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
Memory Kit Rankings (Price vs Performance) November 2024 RAM Rankings

We calculate effective RAM speed which measures performance for typical desktop users. Effective speed is adjusted by current cost per GB to yield value for money. 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 Memory Kits. [RAMPro]

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 RAM? (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

Computer Components FAQ
What is the UBM value for money rating?
What is UBM Effective Speed?
Thunderbolt speed?
Are USB 3.0 cables different?
USB 3.0 vs 2.0 speed difference?
Why buy USB 3.0 today?
USB 3.0 / 4.0 release dates and max speeds?
Graphics Cards
How to force Optimus or Switchable discrete GPUs?
What are the UBM DX11 GPU tests?
What are the UBM DX10 GPU tests?
What are the UBM DX09 GPU tests?
What is the Splatting GPU benchmark?
What is the Gravity (NBody) GPU benchmark?
Memory Kits
What is the RAM value for money rating?
What is the effective RAM speed index?
What is the system memory latency ladder?
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 $296WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $110Nvidia RTX 4060-Ti $380WD Black SN850X M.2 1TB $75
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