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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

  • Capacity8GB
  • Type262-Pin DDR5 SO-DIMM
  • SpeedDDR5 4800 (PC4 38400)
  • CAS LatencyCL40
  • Timing40-39-39
  • Voltage1.10V

Capacity 8GB

Struck-through versions exist but are not stocked here.

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.

Highlights

  • 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

Specifications

BrandCrucial
ModelCT8G48C40S5
Capacity8GB
Type262-Pin DDR5 SO-DIMM
SpeedDDR5 4800 (PC4 38400)
CAS LatencyCL40
Timing40-39-39
Voltage1.10V
ECCNo
Buffered/RegisteredUnbuffered
FeaturesUnlock the potential of your 12th Gen Intel Core laptop processors
Harness blazing speeds and massive memory bandwidth
Game at higher frame rates, run demanding software, and power through heavy workloads
Compatible only with DDR5-enabled laptop, not DDR4-enabled laptops
ECC type = non-ECC, form factor = SODIMM, pin count = 262-pin, PC speed = PC5-38400, voltage = 1.1V, rank and configuration = 1Rx16
Shipping weight0.20 kg
Package size122 × 56 × 6 mm

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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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