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Green circuit board with black memory chips and gold edge connectors

Crucial

Crucial CT8G48C40S5 8GB DDR5 4800 CL40 laptop RAM

SKU CH-DJRW-9M46R MPN CT8G48C40S5

8GB DDR5 SO-DIMM running at 4800 MT/s with CL40 latency for 12th Gen Intel Core laptops

  • Total capacity8 GB
  • Rated speedDDR5 4800 (PC4 38400)
  • CAS latencyCL40
  • Memory timings40-39-39
  • Rated voltage1.1 V
  • Buffer typeUnbuffered

Capacity 8GB

Speed DDR5 4800 (PC4 38400)

CAS Latency CL40

  • 8 GB capacity supports multitasking on 12th Gen Intel Core laptops
  • DDR5 4800 speed delivers 38400 MT/s bandwidth for demanding workloads
  • CL40 latency with 40-39-39 timings provides responsive performance
  • 10 V operation reduces power draw versus DDR4 modules
  • 262-pin SO-DIMM form factor fits DDR5-enabled laptop slots only

8 GB DDR5 SO-DIMM for 12th Gen Intel laptops

This 262-pin module delivers 8 GB of DDR5 4800 memory at CL40 latency. It runs at 1.10 V and uses an unbuffered, non-ECC design. The kit targets owners of compatible laptops who need a straightforward capacity increase.

DDR5 4800 bandwidth ceiling and DDR4 incompatibility

The SO-DIMM operates at the base DDR5 4800 (PC5-38400) data rate with 40-39-39 timings. It fits only DDR5-enabled laptop slots; DDR4 systems cannot accept the 262-pin form factor or the 1.10 V signalling. Bandwidth scales with the platform's memory controller, so peak throughput varies by processor model.

Steps up from 8 GB DDR4 or smaller DDR5 kits

Replacing a single 8 GB DDR4 stick is impossible because the notch position and voltage differ. The upgrade makes sense when a DDR5 laptop ships with 8 GB total and the user runs multitasking workloads that exceed that capacity. Buyers who need 16 GB or more should add a second identical module to enable dual-channel operation.

How it compares

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

Price $24.99
Cheaper than about 80% of the 2,079 comparable items (median $70.99).
Total capacity 8 GB
Lower than about 60% of the 1,886 comparable items (median 16 GB).
Price per GB $3.12 per GB
Cheaper than about 90% 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 nameCrucial
Model nameCT8G48C40S5
Total capacity8 GB
Product type262-Pin DDR5 SO-DIMM
Performance
Rated speedDDR5 4800 (PC4 38400)
Memory
CAS latencyCL40
Memory timings40-39-39
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.1 V
Size & build
Shipping weight0.20 kg
Package size122 × 56 × 6 mm

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 8GB module or add a second stick for 16GB total?

The module is a single 8GB stick. Adding a second identical module gives 16GB in dual-channel mode, which doubles bandwidth for 12th Gen Intel Core laptops.

What does the 4800 MT/s rating deliver in a real laptop?

At 4800 MT/s with CL40 timing, the memory runs at 1.10V and provides the peak bandwidth your DDR5-enabled laptop’s memory controller supports.

Is the 262-pin SO-DIMM limited to PC5-38400 speeds?

Yes. The JEDEC DDR5 standard for this module caps at 4800 MT/s (PC5-38400) with 40-39-39 timings at 1.10V.

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