Useful components for GPU repair to keep in stock

[StandartBlitz]

I have started my own small "graphics card repair shop" in which i focus mostly on the generations between Kepler and Maxwell (AMD equivalents in this time periode as well) and would like to know if there are some components which are very comon and prone to breaking and therefor good to keep in stock so you dont have to buy them at need.
Im especially interested in power stages and low- as well as hight-side mosfets. But common PWM-controllers, bios-chips and those i´ve missed.

I woud be glad for every suggestion

 

[GreenLaser]

When i used to fix amps and such I always populated my spare parts bins as i went along. Order parts as you need them and get extras once you see common part. The old NTE catalogs were good for finding common cross-reference parts.

 

[StandartBlitz]

That seems reasonable I guess but searching for similar parts on component vendors sounds like a good idea - thanks