What is the difference between an AT and an ATX case?

In addition to the automatic shutdown function, the ATX power supply can also support system hibernation and STR (a new hibernation technology, after hibernation, the host and hard disk are all turned off, only the memory is powered, so that the data in the memory is not lost, and the operating system can be instantly entered when the computer is turned on, without the need for a self-test process. If you use ** UPS power supply, when the UPS battery is about to run out, it can also realize automatic alarm and shutdown.

All of the above are not available in AT power supply, and now it is basically difficult to see AT power supply, which has been eliminated.

The ATX AT chassis is primarily for power supplies.

AT vs. ATX

There are four outputs (+5V, -5V, +12V, -12V) and an additional signal to the motherboard. The volume of the AT power supply ** is 150mm, 140mm, 86mm.

For computer startup and shutdown, if you use AT power, after turning off the computer power switch, the power is really turned off. Digging and sleeping.

Difference Between ATX Motherboard and M-ATX Motherboard:

1. Size. ATX is the largest format with a size of 305 244 mm. It is followed by the Micro ATX, which is slightly shorter at 244 244 mm.

When it comes to the size itself, if your computer case is smaller than the size required for a certain format, you should only be concerned. On the contrary, there is no need to worry that this situation is "too big" for the motherboard, since each case has a standardized layout designed to accommodate any motherboard that can fit inside.

2. RAM capacity.

One of the biggest differences is the number of RAM slots included in the motherboard design. While ATX and Micro ATX motherboards can support up to four RAM modules. That is, if the 2 16 GB kit is installed, the ATX and Micro ATX can support twice as much memory.

However, this isn't a big disruptive factor for gamers, as even 16 GB of RAM is more than enough for today's gaming PCs. However, professionals who work with more RAM-rich software may prefer to use a motherboard that not only supports a higher total capacity, but also allows the installation of a four-module kit.

3. PCIe slot.

The bigger difference between all two motherboards is the number of PCIe slots included in their respective designs. ATX motherboards are leading the way in this segment, as they can have up to 7 PCIe slots.

Another one is limited, Micro ATX motherboards up to 4. Obviously, PCIe slots are used by graphics cards, but they can also be used by various other expansion cards: sound cards, internal modems, etc. That said, this should be taken into account when making a choice.

Problems that can arise with Micro ATX motherboards especially stem from where the PCIe slot is located at the edge of the board. So, if the motherboard itself is perfect for a certain situation, any serious graphics card cannot be used without extra space.

The ATX chassis is a standard chassis, and the M-ATX chassis is a small chassis. When you open the lid of the ATX case, you can see that the motherboard has 4 rows of screw holes from top to bottom, while the M-ATX generally has only 3 rows. This is the most obvious difference.

There is no big difference in the exterior and internal architecture, except that the M-ATX motherboard is smaller, there are many fewer PCI slots, PCI-E slots than ATX, and some extra ports are omitted.

Specific size: M-ATX The size is about 240mm 260mm, as shown in the figure below, one side of ATX is 305mm, and the other side is 180--250mm, as shown in the figure below.

Standard, the appearance is relatively tall, micro, generally relatively short, and the distance between the front and back may be shorter.

The appearance is not visible above, and you have to look at the product manual to know.

ATX motherboards and M-ATX motherboards differ mainly in terms of standard publication time, size, and number of slots.

1. The difference between the standard publication time

The ATX motherboard standard was formulated by Intel in 1995, which is the ATX (Advanced Technology Extended) motherboard standard. ATX replaces the AT motherboard specification as the default motherboard specification for newer computer systems.

The M-ATX motherboard standard was published in December 1997.

2. The difference in size

A standard ATX motherboard is 305 mm long and 244 mm wide.

The standard M-ATX motherboard is 244 mm long and 244 mm wide, equal in length and width.

3. The difference in the number of slots

ATX motherboards have a total of seven slots, and the location of CPU, I-O slots, and memory slots is more reasonable than that of the previous generation BAT motherboards.

The length of the M-ATX motherboard has been reduced from seven to four, but the width of the slots and the size of the backplane are the same as those of the ATX.

Encyclopedia-micro-atx

Encyclopedia - ATX structure