ATX 4u server empty box?

[Robumf]

Before the virus I bought a case at Free Geek that I believe is ATX 4U server rack for $50.

 

Probably use as a Audio Work Station. I would like to also use it for a gaming computer that makes minimum requirements for high settings for Anno 1800. And reduce the power usage when playing My Little Karaoke which takes minimal resources.

 

I like a confirmation what ATX board will fit with the pins and any suggestions for best bang for my buck. I have no problems using older, parts. And don't need the fancy lights.

 

Anon 1800 minimum for high setting

OS: Microsoft Windows 7, Windows 8 or Windows 10(64-bit versions only)
Processor: Intel i5 4690k @ 3.5 GHz, AMD Ryzen 5 1500X @ 3.5 GHz
Video: NVIDIA GeForce GTX 970 (4 GB of VRAM) or AMD Radeon R9 290X (4 GB of VRAM) *,**
DirectX: DirectX 11 or DirectX 12
Memory: 8 GB RAM

[kelvinhall05]

Doesn't really look like a 4u server rack case to me, but regardless, it will fit standard parts.

[Robumf]

There are now many sizes for ATX. Just want to make sure there is no added letters. It been a decade since my last start from nothing build.  I feel I'm out of date.