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Is it possible to Y 2 PSUs into one ATX port?
- Thread starter PCN00B
- Start date
- Joined
- Dec 10, 2011
- Location
- Cádiz (Spain)
You can use two PSUs by using a relay to pull down the PS_ON signal of the slave PSU, or a switch to manually start the slave PSU. This would use one of the PSUs (the master one) to power the board and you could use the other one for GPUs, HDDs or whatever.
Y-ing PSUs as you said is not a recommended procedure, you could have magic smoke somewhere.
Y-ing PSUs as you said is not a recommended procedure, you could have magic smoke somewhere.
- Joined
- Nov 28, 2001
Yes, wiring PSUs in parallel is never a good idea. Series is doable, but unless you're looking to power some 24V item, it's pretty useless for a PC. Go for the larger PSU instead, or as txus.palacios stated, use one PSU for the board, the other PSU for GPU, HDD, etc.
- Thread Starter
- #4
That actually confuses me. I would have expected parallel would work, as the voltage stays the same.
Reason I'm asking guys is that this is for a car PC, and the largest car PSU; with smart turn on (ideal for car PCs) is 250W/300W Peak.
The problem wattage problem that I'm facing is PCIe boards. The calculations that I run tell me that x16 PCIe slots suck alot of juice. Some say that the wattage is based on the board itself and not the x16. With that said, the DVR card alone is asking 300W recommended. This wattage I'm assuming comes from the capabilities of wiring up x16 cameras, assuming average wattage of 18W.
So if I can't Y the into the 24 pin on the mobo, what about Y-ing into the 12V 8pin on the mobo?
- Joined
- Jul 14, 2002
If you connect PSUs together that way, their regulators will fight one another and possibly cause harmful oscillations.
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