What is the difference between an AT and ATX motherboard [Archive]

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Terry_CPU

01-11-2002, 08:00 AM

I am looking for information on the various motherboard layouts. I have a Dell Case and would like to know if an ATX motherboard will fit in my case. The case is for a Intel 133/166 and uses a riser board for the buses. My question is: Is the ATX both a motherboard controled power supply and a specific layout of the input/output ports.

Sterling_Aug

01-11-2002, 08:13 AM

Yes. You can not easily mount an ATX motherboard/power supply in an AT case. Most generic cases this would be no problem, but brand name cases do not allow that flexibility.

Get a new case for $60.

Rocketmech

01-11-2002, 05:37 PM

Chances are your Dell system could be using the LPX form factor. Sort of a modified AT. Very non-standard and no after market upgrades. The design leaves the end user on a dead end street. If this is the 'case' you'll need to look for a new one. The ATX controls the P/S and all the I/O ports are grouped together and integrated on the mobo.