/

/

Quality memory and storage — DDR4/DDR5 RAM, SSDs, and hard drives — matched to your exact PC or laptop. Guaranteed-compatible parts, honest prices, and fast shipping.

Shop

Shop All
Find Your Match
Software

Support

How It Works
Compatibility Guarantee
Shipping & Delivery
Returns & Refunds
Warranty
FAQ

Company

About Us
Contact
My Computer
Track Your Order
My Account
Cart

Legal

Privacy Policy
Terms & Conditions
Returns Policy
Warranty

Stay connected

Compatibility tips and upgrade deals, straight to your inbox. No spam.

Your email address

© 2026 Seifelden. All rights reserved.Parts you can count on

Loading…

IBM ThinkPad R51 1836-xxx Memory Upgrades | Seifelden

Your system

IBM ThinkPad R51 1836-xxxMemory Upgrades

Change system Auto-detect

Choose your upgrade

6 guaranteed-fit options

This option is out of stock.

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Checks the drivers on your IBM ThinkPad R51 1836-xxx, installs the safe updates Windows offers, guides the rest to the official download — and confirms exactly which of the upgrades above your machine has room for.

Guaranteed-fit promise

Every kit is matched to your machine's slots and checked against its published specs before we list it.

System at a glance

Memory type: DDR
Slots: 2
Max memory: 2 GB

View full system details

System specifications for IBM ThinkPad R51 1836-xxx

Specifications reported for the IBM ThinkPad R51 1836-xxx.

Memory type: DDR
Form factor: SODIMM
Memory slots: 2
Maximum memory: 2GB
Max per slot: 1GB
Rated speed: 333 MT/s
Processor: 1.5GHz/1.6GHz Intel Pentium M

Good to know

Faster modules automatically run at your system's maximum supported speed.
Maximum capacity per slot is inferred from total capacity ÷ number of slots.

Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

Details & what it sends

Every upgrade for the IBM ThinkPad R51 1836-xxx is out of stock right now

We've already verified which memory and storage upgrades fit this exact machine — they're just not in stock at the moment. Leave your email and we'll tell you the moment any of them is available again. Guaranteed fit, no wrong parts.