This is calculated as 170.18mm - (243.84mm - (34.29mm + 47.29mm)) = 7.92mm And thats it! well maybe a little cleanup.Submit Build Help/Ready post Submit Troubleshooting post Submit other post New Here? BuildAPC Beginner's Guide Live Chat on Discord Daily Simple Questions threads We also get to place the PCI-E Connector on the board This is positioned 7.92mm from the edge of the board to the center of the PCI-e connector that we drew (, Figure 6-14). 99mm Radius, We don't have too, it can be any number in-between, but I for one like avoiding finger cuts as much as possible. ![]() 18mm I know its not alot, but that is what partly threw me off with the m-ITX spec thumb.gifSTEP FOUR:With the last step we can round the corners of the IO Cutout to a maximume of. ![]() The length of the itx motherboard is 170.18mm make sure you add that extra. The math is pretty easy, and ill do it in inches since the atx spec is in inches. To keep consistency I rounded to the hundredth of a mm, 2.44mm. (Checks mini ITX spec, Finds screw up on intel documents) Sigh mITX is also 2.4384, Now to redo all my images. Keep in mind that this IO keepout area will not be interfered with your PCI-e add-in card as the keepout area is explicitly defined for the IO Shield.STEP THREE:The main board is added in this step and the poistion will require a little math to see how I got 2.72mm from the cut-out area edge. This keepout area is defined as 2.54mm around the outside of the cutout (, Figure 4). The IO cutout or "aperture" is defined as 158.75mm by 44.45mm (, Figure 4).STEP TWO:The next thing for the drawing is the keepout area, Keep in mind this is for both the front and back of the of the io area, nothing can be in this space or it will prevent proper mounting of the IO Sheild. I like the ATX Spec 2.2, its nice and straight foreward. This drawing is using ATX Specification 2.2 and its pretty simple to follow through.STEP ONE:The first step. MAIN BOARD REAR IO:For this part we will go over the measurements and drawing of the Rear IO cut-out for your motherboard IO Sheild. This is because most of these IO Shields use the borders edges to "snap" into the hole. If you're making a hole through wood or any material thicker than a cheat of aluminum/steel/alloy, consider making a bigger hole and screw a metal plate with the proper hole dimensions (or 3D print it). For these scenarios, there is a 2.54mm margin around the outside of the "hole" that shouldn't be blocked with anything, which would allow a metal IO Shield to be installed. Some motherboards will have the IO Shield integrated (like some midrange-highend miniITX boards), but others will come with a metal IO Shield you have to put yourself. Note that this is the "aperture", or the "hole". If you're coming from the Internetz, these are the standard measurements, coming from a post on, its 158.75mm by 44.45mm. Pick, Assemble and Install: Video Guide.No intentionally harmful, misleading or joke advice.No excessive posting (more than one submission in 24 hours).No selling, trading or requests for valuation.No self-promotion, advertising, begging, or surveys.No submissions about memes, jokes, meta, or hypothetical / dream builds.No titles that are all-caps, clickbait, PSAs, pro-tips or contain emoji.No submissions about retailer or customer service experiences. ![]()
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