Help downsizing case

[ViperZS]

Hi all,

I've had my PC since 2007 but I've grown out of my "big case with shiny lights" phase and don't game as much. I wouldn't mind swapping my bits into a smaller case but it seems like small cases these days won't take my motherboard.

I'm not especially current with PC bits so could someone give me a bit of advice as to the smallest cases I could get my P35DS3R into? Currently I have an Antec 900

 

[ViperZS]

Budget isn't huge as this isn't a vital case swap, probably the £50 area would be ok.

Is there a particular term to look for on the case specs that would say if the motherboard would fit?

 

[ViperZS]

Thank you very much for the help guys, thanks also for the links, Rustyone!