This is my 2008 computer, it has two DDR2 ram slots with total ram 3gb. But still windows 10 is not smooth even start menu animation is not smooth. I am thinking
Wholesale ddr2 3gb laptop ram For All Random Access Memory Needs - Alibaba.com
OCZ Announces 3GB DDR2 SODIMM Kits
OWC 3GB (1 x 1GB + 1 x 2GB) PC5300 DDR2 667MHz SO-DIMMs Memory RAM Upgrade Compatible with 'Core 2 Duo' 1.83GHz, 2.0GHz, 2.16GHz, 2.33GHz MacBook, MacBook Pro, and iMac Models (OWC5300DDR2S3GS)