Gigabyte Z370 HD3 - NON-ATX bolt pattern?

[spidafly]

Hello everyone.

I just purchased a Gigabyte Z370 HD3 from Fry's. Brought it home, popped it out... hmm, that looks weird.

The top two screw holes appear to meet up with ATX standard. The bottom two screw holes appear to meet ATX standard.

The RIGHT middle screw just doesn't make sense. It doesn't match any ATX measurements I can find. My case (CoolerMaster HAF) supports ATX and E-ATX, has supported every Motherboard I've thrown at it... but there's no hole in the case for a standoff where this middle right screw hole is on the motherboard.

This looks like a ground to me, but I can't be 100% sure. Is this screw optional somehow? Assuming I don't want to drill a new hole in the case (I'm not sure this motherboard is so exceptional that it warrants the hassle?)... should I just go find a motherboard that meets ATX measurements?

If it's optional, that solves my problem. If it isn't optional and I need to return it, that also answers my question. Google has not been forthcoming with answers!

Thank you!

EDIT: ps... here's an image on Amazon for quick reference. Obviously not a photo of the board that is in my possession. It has the same board however, and appears to suffer the same affliction 😛

 

[scout_03]

recheck the back plate since board desing match with case standoff support .

 

[spidafly]

...except the basis of my question is that it doesn't.

Here's photos of the case and board in my possession:

Not talking about a difference of a millimeter, that's like 1.5" off. Googling (and past motherboards) seems to indicate that my case is ATX compliant.

What I don't know - ie. what I'm asking is: am I safe to just ignore this screw hole, or should I go find a compliant motherboard? (Since I'm unwilling to drill my case for a low end mobo.)

 

[scout_03]

what happens if you use the case atx post alpha letter for the atx in the case for stand off .

 

[Calvin7]

That design meets the ATX specification. You can use a 6 screw pattern with no problems. Use care when installing anything on the right side due to flexing.

Such motherboards are low-end models. If you don't like the design you don't have to buy it. More expensive better quality motherboards are available.