Raijintek Themis

Hello, I was wondering if anyone would happen to know the actual ram clearance height of the Raijintek Themis, as the spec. page only seems to list the overall height... Thank you for reading. https://www.raijintek.com/en/products_detail.php?ProductID=3

So I have Samsung HT-THX25 and It's broken but it's audio works perfectly fine so I'm using it as my 5.1 ch audio for pc. No connection to tv. So now I want to know how to connect it to pc and for PC to see and use it as 5.1 ch surround ? This way center speaker plays all the sounds, sub plays...