Average Bench: 94.8% (12th of 108)

Based on 4 user benchmarks.  Model: Unknown HX2666CX15D4/4G Samsung M378A5143DB0-CPB HX2666CX15D4/4G Samsung M378A5143DB0-CPB 16GB
Poor: 80%Average: 94.8% Great: 107%

Popular builds with this RAM

Excellent average bench

The Unknown HX2666CX15D4/4G Samsung M378A5143DB0-CPB HX2666CX15D4/4G Samsung M378A5143DB0-CPB 16GB averaged just 5.1% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Unknown HX2666CX15D4/4G Samsung M378A5143DB0-CPB HX2666CX15D4/4G Samsung M378A5143DB0-CPB 16GB near the top of the comparison list.


Avg. 16 Core Read Bench 36.3GB/s
Avg. 1 Core Write Bench 35.6GB/s

Unknown consistency

There are too few samples to reasonably determine how consistently this RAM perfroms. This result should be interpreted with caution.


Avg. Physical RAM Latency 76.2ns
Avg. 1 Core Read Bench 25GB/s

Average Bench

(Based on 4 samples)
Min Avg Max
30.1 MC Read 36.3 42.3
28.8 MC Write 34 38.7
26.8 MC Mixed 31.8 35.1
97.3% 34.1 GB/s
Min Avg Max
22.1 SC Read 25 26.5
29.2 SC Write 35.6 40.4
25.4 SC Mixed 28.6 31
85% 29.7 GB/s
Min Avg Max
68.8 Latency 76.2 85.7
52.5% 76.2 ns
User Benchmarks Bench Multi core Single core Latency
The fastest RAM (mainstream) averages a speed of 100%
3066, 3066, 3066, 3066 MHz
4096, 4096, 4096, 4096 MB
MC Read 40.6
MC Write 38.1
MC Mixed 33.8
107% 37.5 GB/s
SC Read 27.6
SC Write 38.6
SC Mixed 30.9
92% 32.4 GB/s
Latency 74.8
54% 74.8 ns

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 23,277,692 RAM Kits tested.

EDIT WITH CUSTOM PC BUILDER Value: 81% - Excellent Total price: $389

Popular HX2666CX15D4/4G Samsung M378A5143DB0-CPB HX2666CX15D4/4G Samsung M378A5143DB0-CPB 16GB compatible motherboards:

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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.

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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.
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  • - Share your opinion by voting.
Memory Kit Rankings (Price vs Performance) January 2020 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.


108 Memory Kits (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different RAM Kits perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

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