
G.Skill
G.Skill F5-4800S4039A16GA1-RS RipJaws 16GB DDR5 SO-DIMM
★★★★★
16GB DDR5
DDR5-4800 SO-DIMM at 1.10V gives your laptop the bandwidth ceiling it needs for modern workloads without the power penalty.
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Overview
Key Features
Brand: G.Skill, Series: RipJaws DDR5 SO-DIMM, Model: F5-4800S4039A16GA1-RS
16GB kit containing 1 x 16GB modules, DDR5-4800, 262-Pin, CAS Latency CL40 (40-39-39-76) at 1.10V
ECC: No, Single Channel Kit, Recommended Use: High Performance or Gaming Memory
Rated frequency & stability depends on MB & CPU capability
Specifications
Brand
G.Skill
Series
RipJaws DDR5 SO-DIMM
Model
F5-4800S4039A16GA1-RS
Capacity
16GB (1 x 16GB)
Memory Type
DDR5
Form Factor
262-Pin SO-DIMM
Speed
4800 MHz (PC5-38400)
CAS Latency
CL40-39-39-76
Voltage
1.10V
Channel
Single Channel
ECC
No
Pros & Cons
👍 Pros
- DDR5-4800 delivers approximately 38.4 GB/s peak bandwidth per channel — a substantial improvement over the ~34 GB/s ceiling of DDR4-4266, which benefits memory-bandwidth-sensitive workloads like data processing and integrated graphics.
- The 1.10V operating voltage is more power-efficient than DDR4's 1.2V standard, contributing to improved battery efficiency on laptop platforms.
- G.Skill's IC chip screening process targets modules that meet rated specifications reliably rather than binning down from failed higher-speed parts — stability under sustained load is a key quality claim.
- 262-pin SO-DIMM form factor is universal across DDR5 laptop platforms — physical compatibility is straightforward on any DDR5-capable system.
- 16GB single-module capacity leaves the second SO-DIMM slot free for a future upgrade path to 32GB dual-channel without discarding existing hardware.
👎 Cons
- Single-module single-channel operation leaves integrated GPU performance below what a dual-channel 2x8GB or 2x16GB configuration would achieve — on platforms where the iGPU shares system memory bandwidth, this is a measurable gap.
- CL40 timings are at the looser end of DDR5-4800 — tighter-timed alternatives exist, though the real-world impact for most workloads is minimal.
- DDR5 is not backward-compatible with DDR4 systems — this is a platform-specific upgrade, not a universal one.
- Actual 4800 MHz operation is contingent on the host platform's memory controller; some older DDR5-capable platforms may default to lower speeds.
Frequently Asked Questions
Will this module work in my laptop if it currently has DDR4?
No. DDR5 and DDR4 are physically and electrically incompatible — the 262-pin DDR5 SO-DIMM connector does not fit a DDR4 slot. Your laptop must explicitly support DDR5 to use this module.
Is 4800 MHz the actual operating speed, or does it require XMP/EXPO to reach that frequency?
DDR5-4800 is the JEDEC standard speed for this module — it should run at 4800 MHz on any DDR5-compatible platform without enabling XMP profiles. That said, actual achieved speed depends on your motherboard and CPU's memory controller capability.
This is a single 16GB module — does that mean it runs in single-channel mode?
Yes. A single module operates in single-channel mode. If your laptop has two SO-DIMM slots and you want dual-channel bandwidth — which can improve integrated GPU performance notably — you would need a second matching module.
What is the voltage, and does that matter for laptop use?
The module runs at 1.10V, which is the DDR5 standard and lower than DDR4's typical 1.2V. The reduced voltage contributes to better power efficiency, which translates to marginal but measurable battery life improvement on mobile platforms.
What CAS latency does this module use?
CL40-39-39-76 at 4800 MHz. At DDR5-4800, CL40 is standard JEDEC timing — it represents a higher absolute latency number than DDR4 but a lower cycle time due to the higher operating frequency, so real-world latency is comparable.