Gracias por contestar, justo lo que no queria leer, que este conector 4x2 ATX 12V no es el motivo de que no me funcione el pc.
La configuracion es la siguiente por si sirve de algo:
AMD Phenom II 955 X4 Quad Core 3.2Ghz Black Edition AM3 Box
Gigabyte GA-MA790XT-UD4P Socket AM3
Corsair Twin DDR3-12800 1600 CL9 XMS3 DHX 2x2GB
Sapphire Radeon HD 4870 1GB GDDR5 Vapor-X
Por otro lado copio y pego del manual porque no acabo de entender muy bien lo que quiere decir.
En resumen que si conecto el 4x2 ATX 12V no es necesario conectar el 2x2 extra del conector principal de la fuente, ¿es asi?
1/2) ATX_12V_2X4/ATX (2x4 12V Power Connector and 2x12 Main Power Connector)
With the use of the power connector, the power supply can supply enough stable power to all the
components on the motherboard. Before connecting the power connector, first make sure the
power supply is turned off and all devices are properly installed. The power connector possesses
a foolproof design. Connect the power supply cable to the power connector in the correct orientation.
The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not
connected, the computer will not start.
• To meet expansion requirements, it is recommended that a power supply that can withstand
high power consumption be used (500W or greater). If a power supply is used that does not
provide the required power, the result can lead to an unstable or unbootable system.
• The power connectors are compatible with power supplies with 2x2 12V and 2x10 power
connectors. When using a power supply providing a 2x4 12V and a 2x12 power connector,
remove the protective covers from the 12V power connector and the main power connector on
the motherboard. Do not insert the power supply cables into pins under the protective covers
when using a power supply providing a 2x2 12V and a 2x10 power connector.
Gracias otra vez.