Hello @Fly100,
Thank you for your message.
VGA length limitation of our Core V51 is 310mm(with HDD rack) or 480mm(without HDD rack).
You may find more details here: https://www.thermaltake.com/core-v51-tempered-glass-edition.html
What's more, you may also join our Facebook Group, where you can share your latest Thermaltake builds, get help with products and keep up to date with the latest information :)