The document summarizes the key components and types of computer power supplies. It discusses the main parts of a power supply including the metal coating, switch, fan, and current input. It then describes the most common power supply formats: ATX, SFX, TFX, Flex ATX, and custom formats for servers. Each type has maximum power capacities ranging from 250W to 2000W depending on the format. The document also explains 80 Plus power supply certification levels from White to Titanium, which indicate the percentage of rated power the supply can deliver under load.

1. Components d’un equip
microinformàtic

2. Power Supply

3. What is a power supply?
A power supply is an electrical device that supplies electric power to an electrical load ... The source
power may come from the electric power grid, such as an electrical outlet, energy storage devices such
as batteries or fuel cells.

4. Parts of Power Supply
Metalic Coating
Switch On/Off
Current Input
Fan

5. Parts of Power Supply 2

6. Types of Power Supply
There are 5 types of power supplies that are used today:
-ATX
-SFX
-TFX
-Flex ATX (servers)
-Customs (servers)

7. ATX
ATX is the most used format in current power supplies. Most 'normal' sized PC chassis are made
to fit such a font.

8. SFX
The second most used format is SFX, since it is the most common in ultra-compact PC
assemblies, the so-called Small Form Factor (SFF).
The maximum power sources that can be developed with this format are only 600 to 700W,
very far from the 2000W or more that have been achieved with the ATX.

9. TFX
This physically very elongated format is another one designed for equipment of reduced
dimensions, and especially for “slim” type boxes that are quite long and thin at the same time.
The maximum power that can be achieved with this source is 350W.

10. Flex ATX (servers)
This format is very rare in pre-assembled equipment. It is a format that is sometimes mistakenly
called 'mini-ITX format', when in fact it does not exist. Its common dimensions are 81.5mm wide,
40.5mm high and 150mm.
The maximum power that can be achieved with this source is 250W.

11. Customs
It is a font format used for servers, it is not a format that exists as such since we are talking
about fully customized sizes, shapes and mounting systems that vary from font to font.

12. 80 plus certification
What is it?
Power supplies that state "500W", for example, don't fully deliver that power. The energy
certification they offer depends on it. The higher this certification, the more power it will
deliver.
To give you an idea, the 80 PLUS certification delivers 80% power at 100% load. What does this
mean? Following the example of the 500W source, it will deliver 80% of that power which is
400W (500 x 0.8).

13. Type of 80 Plus
-80 Plus White
-80 Plus Bronze
-80 Plus Silver
-80 Plus Gold
-80 Plus Platinum
-80 Plus Titanium

14. END