AT和ATX代表 Advanced Technology power supply 和 Advanced Technology Extended power supply。两者都是开关模式电源 ( SMPS ) 的类型。开关模式电源向电气负载提供电力。 SMPS 使用开关稳压器来高效转换电能。
AT电源和ATX电源的区别：
| S. No. | Category | At power supply | AtX power supply |
|---|---|---|---|
| 1. | Full Form | AT power supply stands for Advanced Technology power supply. | ATX power supply stands for Advanced Technology Extended power supply. |
| 2. | Motherboard Required | It can be supplied to AT motherboard | It can be supplied to ATX motherboard |
| 3. | Number of power connectors | The main power connectors in AT power supply are 2 in number. | There is only 1 main power connector in ATX power supply. |
| 4. | Number of pins per connector | There are 6 pins per connector in AT power supply. | There are 20 or 24 pins per connector in ATX power supply. |
| 5. | Number of rows on pins | The pins in AT power supply are arranged in a single row. | The pins in ATX power supply are arranged in 2 rows. |
| 6. | Switching the power on/off | It has a physical switch which can be operated manually. | It has a switch which can be operated by a software by the motherboard. |
| 7. | Power Supply | Power provided by AT power supply is less than 250 Watts. | Power provided by ATX power supply is more than 300 Watts |
| 8. | Unique Connectors | It has mini-Molex connectors for floppy devices. | It has a SATA (Serial Advanced Technology Attachment) connector. |
| 9. | Manufactured by | It was manufactured by IBM. | It was manufactured by Intel. |
| 10. | Year of Manufacture | It was manufactured in 1984. | It was manufactured 1995. |