Question about male Molex ports on Motherboards: Please help!

[bobby3dse]

Hi everyone, I have the BIOSTAR TB85 motherboard with LGA 1150 socket, and on the motherboard there are two male molex connectors labeled "auxpwr1" and "auxpwr2" and I don't exactly know if I should plug in a female molex cable into it and risk maybe shorting something. Does anyone know what those ports are for? Thanks for your help!

[Kaetemi]

Check the manual. I have one that says you need to plug those in when you put three or more graphics cards in the PCIe slots. Is this a mining board?

 

EDIT: Yes, it is. Bitcoin Mining Hardware Guide (biostar.com.tw) - This page explains why those connectors are there.

[manikyath]

they're there to provide supplemental power to the PCIe slots. they "shouldnt be" necessary, unless for some odd reason biostar disconnected the PCIe power from the 24pin entirely.

[bobby3dse]

24 minutes ago, Kaetemi said:

Check the manual. I have one that says you need to plug those in when you put three or more graphics cards in the PCIe slots. Is this a mining board?

 

EDIT: Yes, it is. Bitcoin Mining Hardware Guide (biostar.com.tw) - This page explains why those connectors are there.

I don't have the manual, but I did look it up for 15 minutes and found an article saying the same thing. My original idea was that they were there for the audio out for some reason, because when I plugged headphones into the front headphone jack, there was a TON of background noise and I had no idea why. Do you think it could still have something to do with that, and do you think it would harm the board if I plugged the molex cable in with just one graphics card installed?

[SorryBella]

14 hours ago, bobby3dse said:

there was a TON of background noise

WAY TOO MANY variable. Your PSUs, grounding conditions, the board condition, your system workload, and many more micro factor influences how bad the background noises are. That molex wont solve it.

[Kaetemi]

23 hours ago, bobby3dse said:

I don't have the manual, but I did look it up for 15 minutes and found an article saying the same thing. My original idea was that they were there for the audio out for some reason, because when I plugged headphones into the front headphone jack, there was a TON of background noise and I had no idea why. Do you think it could still have something to do with that, and do you think it would harm the board if I plugged the molex cable in with just one graphics card installed?

 

You can plug them in but it won't do anything.

 

Also, mainboard audio is 99% of the times pretty noisy. Just look at the lack of any meaningful electronics around the audio ports. Get a good external DAC.

[Echothedolpin]

4 hours ago, Kaetemi said:

 

You can plug them in but it won't do anything.

 

Also, mainboard audio is 99% of the times pretty noisy. Just look at the lack of any meaningful electronics around the audio ports. Get a good external DAC.

Modern motherboard audio on a decent board isn’t bad, on a mining-focused motherboard though it’s probably extremely poor.