Hardware Reference
In-Depth Information
TheresultwasofficiallycalledATX12V2.0andwasreleasedinFebruary2003.ATX12V
2.0 included two major changes from the previous ATX12V 1.x specifications: a new
24-pin main power connector and the elimination of the 6-pin auxiliary power connector.
The new 24-pin main power connector included four more pins supplying additional
+3.3V, +5V, and +12V power plus a ground. The inclusion of these extra pins delivered
extra power to satisfy the power requirements for PCI Express video cards drawing up
to 75 watts, but it also made the older 6-pin auxiliary connector unnecessary. The pinout
of the new 24-pin main power connector started to be implemented in motherboards in
mid-2004. The motherboard connector pinout is shown in
Table 18.10
,
and the PSU con-
nector is shown in
Figure 18.23
.
Figure 18.23
ATX12V 2.x 24-pin main power connector.
Table 18.10 ATX12V 2.x 24-Pin Main Power Supply Connector Pinout (Motherboard Connector)
