PSU ATX Aux Connector (6-pins)

I got an old Gigabyte 8TX mobo. It is powered by 3 connectors from the PSU:
-ATX main (20-pins)
-ATX aux (6-pins)
-Aux 12V (4-pins)
Yesterday, i bought a new PSU 420W but the AUX 6-pins connector is missing. I plug the rest of cables, switch my PC on and it works...Is the 6-pins connector really needed? Pls, reply asap... :)
 
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