Given the size and weight of discreet GPU cards the past few years,
GPU support brackets have become popular to prevent sag (tower cases
with GPU mounted side-ways) and thus potential damage to the GPU and
motherboard. Most current motherboards, say last 5 years os so,
feature at least one reinforced PCI-express x16 slot for these heftier
cards. GPU manufacturers also have balanced the card and trimmed the
weight a bit as well. However, we often see recommendations to add a
GPU support bracket to your new or existing build. Is this support
required?

Generally, no. If you do see significant GPU sag, first check the end
bracket connection and make sure the card is fully seated in the slot.
Some larger cards can be a bit difficult to get snapped in correctly
in a tight space.

Case in point: XFX Radeon RX 5700 XT THICC Ultra III

This is a massive card, heavy, and dwarfed my prior 900- and
1000-series Nvidia GPUs. It was a very tight fit in my large full tower
Antec P100 case and seemed to wobble a bit. So I used a twist tie to
provide a bit of lift.

No need to spend money on some silly piece of plastic or metal.

The new Sapphire Pulse Radeon RX 6800 XT Gaming OC is quite a bit
lighter, but I strung it up just in case!