I work at Microsoft, and from observing the workplace, I am pretty sure that every Microsoft developer is perfectly capable of installing a video card.
When I worked at Google, all my computer configuration tasks were handled by technicians from the internal IT service called the "Tech Stop" (*). They were smart, efficient, and knowledgeable Linux experts, and they were always on hand.
Coming from the Windows world, I of course needed a lot of help. At first, I thought that it's just me, and eventually I would accumulate enough know-how to handle Linux myself.
As time went, I noticed that most other Googlers rely on the Tech Stop experts as well - for the tasks that I considered trivial, and which any developer should be able to do easily - on Windows.
I started asking around, and discovered that at Google, 80% of all engineers would NOT be able to replace a video card with a different model: that would require configuring X, and that was well beyond vast majority of people.
Linux: 1, developers: 0 :-).