It's not just OLEDs that can suffer from burn in. Your graphics card's backplate might suffer from it too

An MSI graphics card showing the apparent effects of long term exposure to bright RGB LEDs.

Of all the issues that afflict PC gamers, whether it's a dodgy driver, excessive fan noise, a buggy game patch or OLED burn-in, I would not have put the photodegradation of a GPU backplate in the top 100 of potential issues. 

But apparently, it's a thing. Two users on Reddit (via Videocardz) reported some photodegradation appearing on the backplates of different graphics cards. The discoloration closely matches the patterns you'd expect to see from an adjacent set of memory modules equipped with RGB lighting.