8GB (4GBx2) Team High Performance Memory RAM Upgrade For Lenovo ThinkPad T400 Series T410 Series Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
4GB Upgrade for a Lenovo ThinkPad T410 Series System (DDR3 PC3-12800, Non-ECC, ) at Amazon.com
Lenovo ThinkPad T410 Review - StorageReview.com
ThinkPad T410 has its innards exposed for the sake of a component upgrade guide | Engadget