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What is PEX Function?

V

vsrdan

Gawd
Joined
Jun 29, 2005
Messages
663
On the motherboard I recently purchased for AMD 3200+ Vanice, there is a power connector named as AUX PEX PWR. Anybody knows what this does? This looks like a power connector on a IDE device (12V, GND, GND, 5V). Thanks for any info. in advance.
 
That just feeds extra power into the pci-e graphics system. A lot of 939 pci-e boards have a molex like that. My AX8 has one, and my new NF4 Sli-DR has one too. They recommend plugging it in to help increase system stability...but I've tried the AX8 both ways and it makes no discernable difference. Maybe in an SLI setup it would actually matter.
 
Thanks for the information. Should I connect a regular IDE connector from PSU into this?
 
The connector itself is actually called a molex. But sure, go ahead and plug it in. It can't hurt anything...if anything, it will help make the box more stable.
 
Unlike AGP, PCI-E can supply even more wattage to the graphics cards that are installed into the motherboard. While in single card use, it shouldn't be too much of an issue with the current gen of cards, but it's allways safe to install it.

In two card mode, you'll need it to provide sufficient current to the cards. It's possible they may run without it, but with insufficient current you'll run into more problems, especially thermal runaway. When a component expects a certain current and doens't receive it, the other values will get wonked and cause the part to overspec in other manners to compensate (sure it's not the full technical story, but we don't want everyones eyes to glaze over).
 
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