NotAPimecone

Distinguished
Nov 18, 2006
299
0
18,780
Pretty much, those holes are for you to screw your mobo into the standoffs, which hold the board up from below.

Some cases have built-in standoffs in the standard positions, for others you have to screw the little brass hex standoffs into the holes in the case.
 

Newf

Distinguished
Dec 24, 2005
2,010
0
19,860
Every hole in your case tray that matches a motherboard hole should be used to mount the motherboard.
Every hole in your case tray that does not match a motherboard hole should be left empty, avoiding any electrical shorts to ground.
 

diashto

Distinguished
Jul 20, 2006
16
0
18,510
You MUST use the standoffs... unless you want some pretty impressive fireworks and some blown up componants.
 

ganjaman

Distinguished
Dec 7, 2006
32
0
18,530
lol i ment to determine the stand off placeing, the screws are not going flush to the mobo so should i use the washers?
 

diashto

Distinguished
Jul 20, 2006
16
0
18,510
so long as there's nothing plugged into it, yeah.

If the screws arent gripping the motherboard, get shorter screws ;) Or your standoffs might be stripped or mis-threaded.-