SK Hynix HMA851S6CJR6N-VK 4GB DDR4-2666

★★★★★ 4.5 (8)

Delivering reliable 2666 MT/s DDR4 performance at standard 1.2V, this single 4GB SODIMM module is a straightforward replacement for aging laptops. Its 1Rx16 configuration and non-ECC design make it a cost-effective, drop-in upgrade for basic systems. This memory is best for users reviving older office notebooks or thin clients that only need a minimal capacity boost for web browsing and document editing.

Capacity 4GB
Kit 1 x 4GB
Memory DDR4
Speed 2666 MT/s
CAS Latency CL19
Form Factor SODIMM
SK Hynix HMA851S6CJR6N-VK 4GB DDR4-2666 ram
34 Overall Score
Also available in:

Snapshot

Pros & Cons

Pros

  • Strong affordability (86th percentile) 86th

Cons

  • Below average capacity (9th percentile)
  • Below average feature (18th percentile)

What owners think

How owner sentiment changed over time

Exclusive

Based on when customers actually wrote their reviews - so you can see whether early praise held up.

Owner sentiment has held steady over time
85/100Our AI sentiment readlow confidence · 5 sources · Oct 2026
1★2★3★4★5★Q2 '19: 5.0★ · 1 reviewQ1 '20: 5.0★ · 1 reviewQ1 '26: 5.0★ · 2 reviews (approx. date)112Q2 '19Q1 '20Q1 '26
Avg ratingHappy (4-5★)Unhappy (1-2★)Bar height = number of reviewsEstimated date

Based on 4 dated customer reviews, grouped by calendar quarter. Period analysis is in English.

The proof

Performance

Performance Percentiles

Speed 37.4
Feature 18.4
Latency 36.6
Capacity 9.2
User Sentiment 60.6
Social Proof 37.8
Affordability 86.3

Specifications

Full Specifications

Memory

Type DDR4
Form Factor SODIMM
Total Capacity 4096
Modules 1
Per Module 4096
Pins 260
Rank 1Rx16

Performance

Speed 2666
CAS Latency 19
Voltage 1.2

Class

ECC No
Registered No

Features

RGB No
Heat Spreader No

vs Competition

Spec SK Hynix HMA851S6CJR6N-VK Corsair Vengeance LPX CMK32GX4M2B3200C16 Team Group T-FORCE VULCAN Z TLZGD432G3600HC18JDC01 G.Skill TridentZ RGB Series F4-3200C16D-16GTZR Patriot Viper Elite 5 VEB516G6030W Kingston FURY Beast KF432C16BBK2/16
Capacity 4GB 32GB 32GB 16GB 16GB 16GB
Kit 1 x 4GB 2 x 16GB 2 x 16GB 2 x 8GB 1 x 16GB 2 x 8GB
Memory Type DDR4 DDR4 DDR4 DDR4 DDR5 DDR4
Speed Mts 2666 3200 3600 3200 6000 3200
Cas Latency CL19 CL16 CL18 CL16 CL30 CL16
Form Factor SODIMM UDIMM UDIMM UDIMM UDIMM UDIMM
Ecc false false false false true false
Compare Compare Compare Compare Compare
Product SpeedFeatureLatencyCapacityUser SentimentSocial ProofAffordability
SK Hynix HMA851S6CJR6N-VK 37.418.436.69.260.637.886.3
Corsair Vengeance LPX CMK32GX4M2B3200C16 Compare 53.474.887.670.989.697.839.3
Team Group T-FORCE VULCAN Z TLZGD432G3600HC18JDC01 Compare 63.274.887.670.960.685.635
G.Skill TridentZ RGB Series F4-3200C16D-16GTZR Compare 53.489.587.645.377.792.360.1
Patriot Viper Elite 5 VEB516G6030W Compare 87.461.687.645.3071.548.3
Kingston FURY Beast KF432C16BBK2/16 Compare 53.474.887.645.377.792.357

Price

Value & Pricing

From €68 1 offer across 1 retailer
Amazon 1 offer From €68

Price History

€65 €66 €67 €68 €69 Jun 13Nov 5 €68

Usage Scores

Overall (33.8)Budget (68.9)Gaming (25.1)Laptop (40.6)Server (11.3)Workstation (22.2)

A full written review is coming soon. The specs, scores, prices and charts above are always up to date.

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