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No 4 Pin Molex Connector on PSU?


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#1 blub

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Posted 14 August 2017 - 01:33 PM

I have a Lenovo Ideacentre 710 desktop (Intel Core i5, 8 GB RAM, 1 TB HDD) that came from Best Buy. Does anyone know if the psu has an available LP4 connector (4 pin, Molex Large Drive Power)? I took off the cover to look inside, but I didn't see an available connector. It doesn't mean it's not there, maybe it's hidden? I know the psu is proprietary, so that doesn't help. I wouldn't have picked the computer solely based on that, but I had no say in the matter.

I need/want to install a PCI Express to PCI adapter card so I can install a PCI card where there's only a PCIe slot. A customer review indicated the adapter isn't bus powered and requires the use of the LP4/molex connector. I'm actually not sure if I need the power connector or not. This stuff is so confusing.

 

I would've asked on Lenovo's forums, but I can't access them. They're so overbloated that I can't get the website to load with a super slow internet connection.



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#2 JohnC_21

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Posted 14 August 2017 - 02:20 PM

If you have an extra SATA power connector coming from the PSU you can get an adapter like the ones below to give you a Molex connector.

 

Single

 

Double

 

You can see from the below adapter it has one molex connector for power.

 

https://www.startech.com/Cards-Adapters/Slot-Extension/PCI-Express-to-PCI-Adapter-Card~PEX1PCI1



#3 blub

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Posted 16 August 2017 - 02:48 PM

That adapter is the one I'm considering purchasing. I contacted StarTech with some questions and didn't get much help. Why do I need to use the LP4/molex connector? Do PCI cards need more power than PCI Express cards?



#4 JohnC_21

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Posted 16 August 2017 - 03:16 PM

I am just hazarding a guess here but looking at PCIe at Wiki the PCIe x 1 slot uses 12v and 3.3v connections. PCI needs 12v and 5v which is what a molex connector will give.






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