1GB (1X1GB) RAM Memory 4 IBM Lenovo ThinkPad R51 Notebook Series DDR1-PC2700 | eBay
CMS 2GB (2X1GB) DDR1 2700 333MHZ NON ECC SODIMM Memory Ram Compatible with Ibm Lenovo Thinkpad R51 Notebook Series - A49 - Walmart.com
Meet this bad boy from 2006, IBM ThinkPad R51 with Celeron M and 256 MB of RAM. Still works fine and is in good enough condition considering it being 14 years old.
IBM ThinkPad R51, 1.5 GHz, 1GB GB ram – dba.dk – Køb og Salg af Nyt og Brugt
1GB RAM Memory for IBM ThinkPad R51 1833 MemoryMasters Memory Module DDR SO-DIMM 200pin PC2700 333MHz Upgrade at Amazon.com
parts-quick 2GB (2x1GB) Compatible Memory for IBM ThinkPad R51 1830-xxx PC2700 333MHz SO-DIMM Notebook RAM Brand at Amazon.com
New IBM ThinkPad R51 notebook models feature a three-year limited warranty
Laptop IBM ThinkPad R51 TYPE 1829 - Sklep, Opinie, Cena w Allegro.pl
256MB RAM Memory for IBM ThinkPad R51 Series (Type 2888) Black Diamond Memory Module DDR SO-DIMM 200pin PC2700 333MHz Upgrade System Specific Memory - Newegg.com
Win XP Pro 512MB RAM 40GB | Ibm ThinkPad R51 15" Pentium M Laptop