How to Select the Right RAM for your Desktop (Buying Guide) (Updated 2026)

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RAM upgrade support · Richcom Technology

Plan a RAM upgrade that fits your computer

More memory can be useful for some workloads, but the right upgrade depends on your computer and how you use it. Tell us the exact system model, current memory and the applications you want to run. Request an appointment if you need compatibility checks and installation help.

Request an Appointment

Your preferred visit time needs confirmation.

  1. Tell us about the fault

    Share the model and symptoms in the form below.

  2. Confirm your appointment

    Submit a preferred date and time for confirmation.

  3. Approve the quoted work

    Charges are quoted after assessment. Work needs your approval.

How to select desktop RAM

Reviewed 10 October 2026. Match the motherboard’s supported DDR generation, module format, capacity and speed. DDR3, DDR4 and DDR5 are different standards. A desktop UDIMM is different from a laptop SO-DIMM.

Check the motherboard, not just the CPU generation

Richcom’s Intel Essential, Standard and Professional Office PCs use DDR4 motherboards. The AMD office examples use DDR5. Some processors support more than one memory generation, but the motherboard and its slots determine which modules the finished system can accept.

Current DDR4 desktop examples

Prices are in LKR, checked on 10 October 2026. These listings specify 288-pin DDR4 UDIMMs, rather than laptop SO-DIMMs.

Desktop RAM options
Published modulePrice (LKR)
Lexar (USA) 16GB DDR4 3200MHz Desktop RAM (3Y)38,000
Lexar (USA) 8GB DDR4 3200MHz Desktop RAM (3Y)24,750

Capacity, slots and channel arrangement

Check installed modules, free slots and the supported maximum before ordering. Choose capacity for the workload and use supported matched configurations where appropriate. Adding capacity does not itself increase a module’s rated transfer speed.

Can DDR4 and DDR5 be mixed?

No. Their electrical requirements and keying differ. Even where both desktop UDIMMs use 288 pins, they are not interchangeable.

Server and branded desktop requirements

Check the exact system’s requirements for ECC, registered or unbuffered memory, voltage and supported capacity. Standard desktop RAM is not automatically suitable for a server.

Before fitting

Share the motherboard or complete desktop model and existing memory. Confirm the module, operating speed, fitting charge, testing and warranty terms. See the Intel and AMD office comparison for complete-system examples.

Sources

The linked Richcom products support formats and prices. Crucial’s memory-generation guide explains why different DDR generations cannot be mixed.

Request an Appointment

RAM compatibility and installation

Repair charges will be quoted after assessment. Work begins after your approval. Your preferred visit needs confirmation.

These details are used to review and contact you about your request. No payment is collected by this form. All times are Sri Lanka time.

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