Yes, you can play a game in Borderless and it should perform similarly to full screen.
Yes, you can play a game in Borderless and it should perform similarly to full screen.
I'm dealing with an issue where the Assassin's Creed Rogue in full screen exits, causing your desktop gadgets to move randomly across the desktop. Even when the window is closed, it remains in the same spot. This problem occurs on a monitor with an R9 390 nitro crimson driver.
The main reason I enjoy playing borderless is the ability to switch between screens. It’s simply more convenient, and based on my experience, there have been no significant performance issues.
I prefer games with no borders because they feel smoother. Speed should match, but you can always test on your own system to check personally.