Question MOBO form factor HP EliteDesk 800 G3 Small Form Factor PC

[marioficozzi]

Hi guys

i would like to know if the mobo of HP EliteDesk 800 G3 Small Form Factor PC
is a standard mini atx or is some kind of propretary form factor.
I have measured this mobo and is 200 mm x 200 mm not like standard mini atx.
I ask this question because i was thinking of buying a new case with a new pu in order to insert my gpu, do you have any suggestion for cases?
thank you in advance

 

[rgd1101]

not standard. http://h10032.www1.hp.com/ctg/Manual/c05386798