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Crucial CT8G48C40U5 8GB DDR5-4800 UDIMM
Crucial

Crucial Technology CT8G48C40U5.C4A1 8GB

RAMView on crucial.com
Capacity:
8GB
Speed:
4800MT/s

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Manufacturer: Crucial Last updated: 2026-09-14

Crucial Technology CT8G48C40U5.C4A1 8GB Review

The Crucial CT8G48C40U5.C4A1 is an 8GB DDR5-4800 desktop module, the same bare-label spec Crucial sells under several part-number suffixes for this capacity and speed.

We'd use this to add a second 8GB stick to an existing single-module PC or as the cheapest entry into a DDR5 board, not as a primary module for a new build.

Performance

4800MT/s CL40 is DDR5's un-tuned baseline, true latency around 16.7ns with no XMP profile. This part number is functionally identical to Crucial's CT8G48C40U5.M4A1, just a different retail/vendor suffix on the same spec.

Comparison to Alternatives

Treat this the same as Crucial's own CT8G48C40U5.M4A1 already in this catalog, same capacity, speed, and timings. Step up to Crucial's CT8G56C46U5 line for a faster 5600MT/s bin at the same 8GB capacity, or to Crucial Basics CB16GU4800 for double the capacity at the same 4800MT/s speed.

Specifications

Identity

BrandCrucial
Part NumberCT8G48C40U5.C4A1
SeriesCrucial RAM

Memory

DDR GenerationDDR5
Capacity8 GB
Speed4800 MT/s
CAS Latency40
Module Count1
Voltage1.1 V

Physical

Form FactorDesktop DIMM
RGB LightingNo

Module and platform

RAM SegmentDesktop DDR5

Capacity

Capacity Per Module8 GB

Speed and timings

True Latency16.7 ns

Silicon

Memory ICMicron
ECCNo

Physical and lighting

ColourGreen PCB

Commercial

WarrantyLimited Lifetime
Model NumberCT8G48C40U5.C4A1
OC ProfileJEDEC Standard (No XMP)
Spec Score3.2

Expert Review

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

  • Adding a second 8GB stick to an existing single-module PC
  • Cheapest entry into a DDR5 desktop build

Not for

  • New gaming or content-creation builds (too little capacity)
  • Buyers wanting XMP-tuned speeds

FAQs

What are the key specifications of the Crucial Technology CT8G48C40U5.C4A1 8GB?

The Crucial Technology CT8G48C40U5.C4A1 8GB is a memory kit from Crucial. Key specs: DDR Generation DDR5, Capacity 8GB, Speed 4800MT/s, CAS Latency 40, Module Count 1.

Will the Crucial Technology CT8G48C40U5.C4A1 8GB work with my current setup?

The Crucial Technology CT8G48C40U5.C4A1 8GB lists DDR Generation is DDR5. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits. Our upgrade checker at /upgrade can confirm compatibility for common combinations.

Who is the Crucial Technology CT8G48C40U5.C4A1 8GB best suited to?

It suits adding a second 8gb stick to an existing single-module pc, cheapest entry into a ddr5 desktop build.

What are the drawbacks of the Crucial Technology CT8G48C40U5.C4A1 8GB?

It is a poor fit for new gaming or content-creation builds (too little capacity), buyers wanting xmp-tuned speeds.

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