Hmm, it works with "@" for me

Anyway, seems you hit the current Compositing/Interrupts bug with gfx card early.
Glad you found a workaround.
Here's hoping someone adds a proper fix soon.
I found that just because a certain gfx chipset it used doesn't mean the specs have to be the same every time.
While looking for an RX card I found so many different types of gfx boards, with the same chipset but with as many different specs, that I lost count.
In the end I got one that unfortunately doesn't have fan control (full power on the fan the whole time - much too loud for my liking - rebuilt to use a lower noise solution since).