Sadly I had 2x1GB (2GB In total) DDR2 667 MHZ RAM sticks.
Apparently they have stopped functioning. So I bought a new MUSHKIN 2GB 800MHZ DDR2 Dual Channel RAM.

I tried playing APB Reloaded, had some lag with the memory, noticed it uses over 1.5GB in task manager, I was like wth, searched on google on why its using so much memory, and it looks like the game engine itself is an abomination.

Anyways, Desoldering/Re-Soldering is a good idea? Maybe give them to an expert to fix? Or Just throw them to trash can?

Send them back to the manufacturer, free replacement so long as they're new etc.

Throw them into the bin, including the ones you "bought new", what the fuck are you doing with such shitty RAM in the first place? Also consider learning proper sentence structure so as to not create such fucking ambiguous paragraphs. As Skul proved, your post is a hell to decipher.

Cannot be arsed, too lazy for learning.

(User was infracted for this post (Useless, bad posting example.))