F5F Stay Refreshed Hardware Desktop E-ATX refers to a specific case size, typically around 228mm x 146mm.

E-ATX refers to a specific case size, typically around 228mm x 146mm.

E-ATX refers to a specific case size, typically around 228mm x 146mm.

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Unmigrate
Senior Member
644
10-25-2022, 08:49 PM
#1
I've been checking out various motherboards and noticed many makers list their sizes as E-ATX, yet they differ a lot. For instance, MSI MEG X670E Godlike and X670E ACE both claim E-ATX, but the Godlike model is wider—about 12 inches by 11.35 inches compared to the ACE’s 12 inches by 10.9 inches. Hmm... Does this suggest E-ATX doesn’t have a strict sizing standard? I recall using SSI-CEB, which measures roughly 12 inches by 10.5 inches (though the mounting holes aren’t identical). It seems we should pay closer attention to dimensions. It might mean the X670E board requires a larger case.
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Unmigrate
10-25-2022, 08:49 PM #1

I've been checking out various motherboards and noticed many makers list their sizes as E-ATX, yet they differ a lot. For instance, MSI MEG X670E Godlike and X670E ACE both claim E-ATX, but the Godlike model is wider—about 12 inches by 11.35 inches compared to the ACE’s 12 inches by 10.9 inches. Hmm... Does this suggest E-ATX doesn’t have a strict sizing standard? I recall using SSI-CEB, which measures roughly 12 inches by 10.5 inches (though the mounting holes aren’t identical). It seems we should pay closer attention to dimensions. It might mean the X670E board requires a larger case.

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Peedy
Senior Member
641
10-25-2022, 10:37 PM
#2
True E-ATX dimensions are specified as 12 by 13 in millimeters (305 by 330 mm). Anything smaller than this is often treated as meeting the standard, and both boards in question fit that range.
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Peedy
10-25-2022, 10:37 PM #2

True E-ATX dimensions are specified as 12 by 13 in millimeters (305 by 330 mm). Anything smaller than this is often treated as meeting the standard, and both boards in question fit that range.

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bunchow_hi
Junior Member
44
11-08-2022, 11:06 AM
#3
It's interesting how producers avoid sticking to a single standard for E-ATX dimensions. With numerous available sizes, it's likely to create confusion among buyers over time.
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bunchow_hi
11-08-2022, 11:06 AM #3

It's interesting how producers avoid sticking to a single standard for E-ATX dimensions. With numerous available sizes, it's likely to create confusion among buyers over time.

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cordekc
Member
50
11-08-2022, 01:06 PM
#4
It doesn't appear to be a major issue when a board is slightly smaller than the standard maximum, provided it has matching screw holes. It should still work with any E-ATX compatible case. The main concern would arise if a case claims E-ATX compatibility but fails to accommodate larger boards.
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cordekc
11-08-2022, 01:06 PM #4

It doesn't appear to be a major issue when a board is slightly smaller than the standard maximum, provided it has matching screw holes. It should still work with any E-ATX compatible case. The main concern would arise if a case claims E-ATX compatibility but fails to accommodate larger boards.

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Donut__Gamer
Junior Member
49
11-08-2022, 04:47 PM
#5
E-ATX is often cited by motherboard makers as a way to justify oversized boards, yet it seems few engineers have even looked at the true ATX specifications. I think we should simply rename the SSI-EEB line to something like "Super - ATX" and push for standardized dimensions instead.
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Donut__Gamer
11-08-2022, 04:47 PM #5

E-ATX is often cited by motherboard makers as a way to justify oversized boards, yet it seems few engineers have even looked at the true ATX specifications. I think we should simply rename the SSI-EEB line to something like "Super - ATX" and push for standardized dimensions instead.

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mcDavoz
Senior Member
544
11-15-2022, 06:40 PM
#6
This concerns the compatibility issue. The product claims to fit an E-ATX motherboard, but only up to a certain size. It’s frustrating when the listing mentions E-ATX without giving clear dimensions, making it hard to verify if it will actually fit in your case.
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mcDavoz
11-15-2022, 06:40 PM #6

This concerns the compatibility issue. The product claims to fit an E-ATX motherboard, but only up to a certain size. It’s frustrating when the listing mentions E-ATX without giving clear dimensions, making it hard to verify if it will actually fit in your case.

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ChloeET
Senior Member
736
11-18-2022, 06:53 AM
#7
I couldn't locate any recent ATX specifications, even on Intel's site. The information I found is from 2002 and still references AGP and PCI connections. We need a unified standard so buyers aren't confused about motherboard dimensions and end up making poor decisions about cases. Currently, some listings only mention E-ATX with a length indicator in brackets, which can be unclear for those who didn’t read the details carefully or misremembered numbers.
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ChloeET
11-18-2022, 06:53 AM #7

I couldn't locate any recent ATX specifications, even on Intel's site. The information I found is from 2002 and still references AGP and PCI connections. We need a unified standard so buyers aren't confused about motherboard dimensions and end up making poor decisions about cases. Currently, some listings only mention E-ATX with a length indicator in brackets, which can be unclear for those who didn’t read the details carefully or misremembered numbers.

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AwesomeGamer89
Member
50
11-19-2022, 06:58 AM
#8
"E-ATX" isn't part of the official ATX specification. It's a term created by manufacturers to describe boards that are broader than the standard ATX size. Essentially, it can vary between different products and has no fixed meaning. It's not an official standard.
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AwesomeGamer89
11-19-2022, 06:58 AM #8

"E-ATX" isn't part of the official ATX specification. It's a term created by manufacturers to describe boards that are broader than the standard ATX size. Essentially, it can vary between different products and has no fixed meaning. It's not an official standard.