ATX is a form factor. It does not dictate a specific chipset; anything from the now ancient 440BX to a Q57 can be used in an ATX system.
most home computers use ATX (Biggest), micro-ATX or mini-ATX (Smallest)
ATX is the form factor.
There's actually three: ATX, Mini ATX, and Micro ATX. The difference is only in size. Mini is about half the size, Micro is 1/3 But of course with the size, you sacrifice extra ports, usually PCI expansion ports.
The chipset is the device that manages everything. The processor just processes it but the chipset transports, controls and manages the output and input data.
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Chipset drivers are software that enables the operating system to use the features of the corresponding chipset.
most home computers use ATX (Biggest), micro-ATX or mini-ATX (Smallest)
yes
ATX is the form factor which Motherboards, Computer Cases and Graphics Cards use to standardise sizing. An ATX form-factor Motherboard will fit an ATX Case, and an ATX Graphics Card will fit in the case as well.
Intel 865G chipset
the sandy bridge chipset uses a single chipset housing
The Nehalem chipset connects directly to the processor rather than to the North Bridge.
There are not really any advantages with a ATX over a Micro ATX just Micro ATX is smaller and ATX is larger
Most ATX motherboards offer a choice of several similar processors. The manufacturer decides which processors can used by a specific ATX motherboard. ATX is a physical and electrical specification. ATX does not define a specific central processor, so theoretically an ATX motherboard could be created for any type or brand of processor that can function within the specification. Common ATX motherboards use either an Intel processor or an AMD processor.
ATX
On a standard Atx Motherboard IDE specifies that no more than 2 devices per bus, so if you have a 2 IDE bus computer you can have 4 devices. Some computers have 4 IDE busses in which case you could have 8 devices (these use a 'Promise IDE raid chipset') This is just recommended specifications at least, you can always hack and try for more off record lol
The ATX form factor is an ancient one. Modules can range all the way from 72-pin DIMMS to DDR3.