Average Bench: 31.5% (110th of 113)

Based on 18,247 user benchmarks.  Model: Hynix HMA851S6AFR6N-UH 1x4GB

Poor average bench

The Hynix HMA851S6AFR6N-UH 1x4GB averaged 68.5% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. Physical RAM Latency 108ns
Avg. 16 Core Read Bench 12.1GB/s

Good consistency

The range of scores (95th - 5th percentile) for the Hynix HMA851S6AFR6N-UH 1x4GB is 22%. This is a relatively narrow range which indicates that the Hynix HMA851S6AFR6N-UH 1x4GB performs reasonably consistently under varying real world conditions.


Avg. 1 Core Read Bench 8.74GB/s
Avg. 1 Core Mixed IO Bench 9.03GB/s

Average Bench

(Based on 18,247 samples)
Min Avg Max
5.8 MC Read 12.1 15.1
5.8 MC Write 10.6 13.4
5.7 MC Mixed 9.06 11.1
30.2% 10.6 GB/s
Min Avg Max
2.14 SC Read 8.74 12.7
3.78 SC Write 10.3 14.9
1.4 SC Mixed 9.03 13.1
26.8% 9.37 GB/s
Min Avg Max
67.3 Latency 108 213
37% 108 ns
User Benchmarks Bench Multi core Single core Latency
The fastest RAM (mainstream) averages a speed of 100%
1 of 2 slots used
4GB SODIMM DDR4 clocked @ 2133 MHz
MC Read 14.2
MC Write 12.7
MC Mixed 9.7
35% 12.2 GB/s
SC Read 11.6
SC Write 12.9
SC Mixed 10.3
33% 11.6 GB/s
Latency 66.3
60% 66.3 ns
1 of 2 slots used
4GB SODIMM DDR4 clocked @ 2400 MHz
MC Read 14.5
MC Write 11.2
MC Mixed 9.2
33% 11.6 GB/s
SC Read 9.9
SC Write 13.1
SC Mixed 12.1
33% 11.7 GB/s
Latency 78.8
51% 78.8 ns
1 of 2 slots used
4GB SODIMM DDR4 clocked @ 2133 MHz
MC Read 13
MC Write 12.1
MC Mixed 9.6
33% 11.6 GB/s
SC Read 10.4
SC Write 12.3
SC Mixed 10.3
31% 11 GB/s
Latency 82.3
49% 82.3 ns
1 of 2 slots used
4GB SODIMM DDR4 clocked @ 2400 MHz
MC Read 14.2
MC Write 11.9
MC Mixed 9.4
34% 11.8 GB/s
SC Read 10.8
SC Write 10.1
SC Mixed 8.8
28% 9.9 GB/s
Latency 123
32% 123 ns
18,247 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 29,969,075 RAM Kits tested.

Typical HMA851S6AFR6N-UH 1x4GB Builds (Compare 10,528 builds) See popular component choices, score breakdowns and rankings.
Gaming 15%
Tree trunk
Desktop 56%
Workstation 23%

System: Acer Aspire A515-51G


Popular HMA851S6AFR6N-UH 1x4GB systems:

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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.
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Memory Kit Rankings (Price vs Performance) July 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.


113 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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