it appears to have a Zotac sticker/emblem on top and apparently they are a pre-built/custom manufacturer.....not really sur, can't find the case on their website
Well Zotac is a gpu brand, so I'm assuming that there is a Zotac gpu in there.
If the case is from a prebult computer, then there's no way we can find the exact model of the case. Prebuilt manufacturers tend to use their own case that's not found on the market.