Can't Do Sleepers...
Boring cases do not offer the fan mounts needed unless were talking like a modern sleeper like a fractal.
TRUST ME on this..
Your much better doing a system out of per say a LianLi O11 over that chieftek, as you will have A LOT more cable routing options for cleaner build, as well as almost ever single compatibility for any modern GPU + rear board nVME + AIO Watercooler on the market.
Old cases do not offer USB3.0 3.1 or even type-C ports.
Leave the sleepers to modders with dremels and cars please.... do not torcher yourself in your build when you get a old antiquated case to build modern parts in. A perfect analogy would be, you don't want to drop in a hellcat redeye engine inside a old charger without extensive modifications.
Same can be said in the PC World... old cases even are limited to 92mm over the 120mm we more commonly use.
What about old ATX cases doesn't work with newer ATX MB's? I haven't heard that before.
This has to do with some cases which support underside nVME.
Also old cases do not have a hole in the rear of the motherboard plane like modern cases do.
This helps when installing a cpu which requires a mounting bracket without you having to pull the board out.
If the cases is honestly more then 5 yrs old, i always recommend a re evaluation on the case.
It may be time for you honestly to get a new one unless your absolute about not having RGB, which then you can replace the fans to non RGB ones.