After less than a minute of searching, Google reveals…I'm planning to get the Pi 5 and I was wondering if it is able to support a 144hz 1080p monitor, and if there was some really cool cases to buy with it (if there is).
Like the Raspberry Pi 4, the Pi 5 has the ability to output to two monitors at up to 4K resolution via its dual microHDMI ports. With its enhanced GPU, the board promises to deliver 60 Hz on each screen and even use HDR color if it’s available.
Source: Tom’s Hardware article