Id strongly suggest downgrading to a 6600/6600XT since the selected motherboard only has PCIe 3.0 x16, while your graphics card runs at PCIe 4.0 x8, meaning you’ll actually run at PCIe 3.0 x8 maximum. Some 6600 cards are going for as little as $120 used btw.

You could also switch to a 6750 XT and get faster infinity cache and VRAM for basically the same price, and find a compatible PCIe 4.0 mobo (x570 chipset) for about $30 more, or $45 more for a board equipped with wifi 6. Mini ITX sized boards also have issues fitting certain graphics cards, so i’d go for a regular ATX.

I also recommend this Segotep 750W power supply instead since it’s compatible with AXT 3.0 & PCIe 5.0, making it usable with future GPU and SSD upgrades. I own two and they are great.

Lastly, 1 TB of storage will go very quickly. Unfortunately all motherboards can only run one m.2 SSD at PCIe x4, so if you plan on getting another m.2 later, know that the “slow port” will only run at PCIe x2 or x1. (No longer true. I forgot x570 chipsets can have two PCIe 4.0 x4.) Get a 670p m.2 now, and spend the $15 on literally any other parts. It’s only PCIe 3.0 x4 but can be upgraded easily.

Here’s my recommended changes, which should leave you with about $100 to spend on peripherals like a mic, speakers or headphones. If you really don’t wanna change any peripherals though, you could always swap the m.2 for Crucial P3 Plus 2 TB to get PCIe 4.0 x4.

A great site to help you keep to a budget is logicalincrements.com

You choose your price on the first column, then it tells you which parts work together to meet that price range. Good luck with your first build!