HyperXHX421C14FB(|2)K2/16
CorsairCMK16GX4M4A2666C16(|B|R)
Real World Speed
Performance profile from 19,858 user samples
17,923 User Benchmarks
Best Bench: 90% @ 1533 MHz
Worst Bench: 41% @ 2133 MHz
Poor: 41% Great: 90%
SPEED RANK: 67th / 105
1,935 User Benchmarks
Best Bench: 110% @ 1600 MHz
Worst Bench: 69% @ 2400 MHz
Poor: 69% Great: 110%
SPEED RANK: 26th / 105
Effective Speed
Effective RAM Speed
73.1 % 89.2 % Faster effective speed.
+22%
MC Read
Avg. 16 Core Read Bench
26.6 GB/s 34 GB/s Faster multi-core read.
+28%
MC Write
Avg. 16 Core Write Bench
27.5 GB/s 34.7 GB/s Faster multi-core write.
+26%
MC Mixed
Avg. 16 Core Mixed IO Bench
23.5 GB/s 30.1 GB/s Faster multi-core mixed.
+28%
MC Read
16 Core Read Bench
33 GB/s 44.8 GB/s Much faster multi-core read.
+36%
MC Write
16 Core Write Bench
34.3 GB/s 44.4 GB/s Faster multi-core write.
+29%
MC Mixed
16 Core Mixed IO Bench
28.3 GB/s 40 GB/s Much faster multi-core mixed.
+41%
Market Share
Based on 9,256,697 RAM Kits tested.
Market Share
Market Share (trailing 30 days)
0.23 % Hugely higher market share.
+667%
0.03 %
Value
Value For Money
54.9 % 69.2 % Better value.
+26%
User Rating
UBM User Rating
64 % More popular.
+19%
54 %
Price
Price (score)
$219 $192 Slightly cheaper.
+12%
Age
Newest
41 Months Slightly more recent.
+11%
46 Months
SC Read
Avg. 1 Core Read Bench
16.4 GB/s 16.8 GB/s +2%
SC Write
Avg. 1 Core Write Bench
26.8 GB/s +3% 26.1 GB/s
SC Mixed
Avg. 1 Core Mixed IO Bench
22 GB/s 22.7 GB/s +3%
SC Read
1 Core Read Bench
20.6 GB/s 21.9 GB/s Slightly faster single-core read.
+6%
SC Write
1 Core Write Bench
35.4 GB/s 38.2 GB/s Slightly faster single-core write.
+8%
SC Mixed
1 Core Mixed IO Bench
27.7 GB/s 28.7 GB/s +4%
Latency
Avg. Physical RAM Latency
69.2 ns 68.1 ns +2%
Latency
Physical RAM Latency
58.8 ns 56.3 ns +4%
Capacity
Capacity
16GB 16GB
Memory Kit Rankings (Price vs Performance) July 2018 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]

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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 RAM? (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.

UserBenchmark of the month

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.
  • - 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.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-8700K $320Nvidia GTX 1070 $413Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $289Samsung 850 Evo 500GB $120
Intel Core i7-7700K $300AMD RX 480 $280Samsung 850 Pro 256GB $136
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $160SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $945SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $55HyperX Fury DDR4 2133 C14 2x8GB $219SanDisk Ultra Fit 32GB $12
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