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Green rectangular SO-DIMM module with gold contacts and black chips

SK hynix

SK hynix HMT451S6BFR8A-PB 4GB DDR3 1600 CL11 1.35V laptop RAM

SKU CH-8BFX-65P9W MPN HMT451S6BFR8A-PB

A 4 GB DDR3 SO-DIMM kit running at 1600 MHz with CL11 timing and low 1.35 V operation

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • CAS latencyCL11
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit
  • 4GB capacity adds multitasking headroom for everyday workloads
  • DDR3 1600 speed delivers 12800 MB/s peak bandwidth
  • CL11 latency keeps response times tight
  • 35 V operation reduces power draw and heat
  • Dual-channel kit enables 128-bit memory throughput

4 GB DDR3 laptop memory upgrade

This SK hynix SO-DIMM adds 4 GB of DDR3 1600 capacity to compatible notebooks. It uses a 204-pin form factor and operates at 1.35 V with CL11 latency. The module is sold as a dual-channel kit for balanced performance. It suits users refreshing older laptops that require DDR3 memory.

Low-voltage operation and thermal behaviour

Running at 1.35 V reduces power draw compared with standard 1.5 V DDR3 modules. The unbuffered design without a heat spreader keeps the profile slim for tight laptop slots. Under normal workloads the memory runs quietly with no active cooling required. Lower voltage also helps limit heat output in compact chassis.

Retail-packaged dual-channel kit

The retail package includes the matched pair for dual-channel installation. No additional software, drivers or accessories are bundled with the modules. The kit format simplifies upgrading both slots at once for optimal bandwidth. Buyers needing a single module or larger capacity should consider other options.

How it compares

Measured against everything we stock in Laptop RAM, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 93% of the 2,079 comparable items (median $70.99).
Total capacity 4 GB
Lower than about 80% of the 1,886 comparable items (median 16 GB).
Price per GB $3.50 per GB
Cheaper than about 87% of the 1,886 comparable items (median $5.94 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameHynix
Model nameHMT451S6BFR8A-PB
Total capacity4 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1600 (PC3 12800)
Memory
CAS latencyCL11
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.35 V

Questions about this item

How do I install this 204-pin DDR3 SO-DIMM and what step is often missed?

Align the notch with the slot key, press firmly until both side clips click, then verify the system detects 4GB at 1600 MHz.

What maintenance or replacement will this 1.35V DDR3 module need later?

No scheduled maintenance is required; replace only if memory errors appear or capacity becomes insufficient for your workload.

What limit appears first on this CL11 1600 MHz kit during sustained use?

The CL11 latency at 1600 MHz sets the throughput ceiling before thermal throttling becomes a factor.

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