Power supply connection

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rvjones10

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Jun 18, 2009
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Hello,
I have a modular power supply with 2 PCI-E connections, one is 6 pin and one is 8 pin. My Graphics card requires two 6 pin connections. Do i have to or can I use an adapter to make the 8 to 6 pin connection?
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Solution
JohnnyLucky
If I understood you correctly your power supply and PCI-e power cable is similar to my own. One end of the cable has a single connector that is plugged to the PCI-e connection on the power supply. The other end of the power cable is split into 2 PCI-e connectors that are plugged into one video card that requires 2 connections. That is perfectly normal. It should be okay.

Your video card came with a power cable adapter that has two 4 pin molex connectors on one end and a 6 pin or 6+2 pin connector on the other end. Normally that adapter is used when a power supply does not have a second PCI-e connection designed for use with a second video card for Crossfire or SLI mode. Although it would work, use of the adapter cable for a system with...
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The 8 pin may be for a newer 12v board, replacing the old 4 pin. If it has 2 pins that break off, then you may be able to use it for your pci-e card. But I would read the specs of your ps carefully, or you could get some smokin from the board. I would try your video card with just one connection first. It may work fine.
 
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+1 what saint19 said.

Please post the brand and model of your psu. Typically the 8 pin PCI-e power cable has has 6 pin connection and a 2 pin connection that are used together to make an 8 connection. A one piece 8 pin power cable is typically for a motherboard connection.
 
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Here is my power supply and the Graphics card i purchased

Power supply -- http://www.newegg.com/Product/Prod [...] 6817152026

Graphics card -- http://www.newegg.com/Product/Prod [...] 6814161302


the card does have 6 pin adapters that run off of two peripheral connects but the card does not recommend that even though it supplies the connector. Just want to make sure it is safe to make that connection.

one more note: the supplied 8 pin connector is strictly 8 not 6+2
 
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Thanks that was useful as I am not up to speed with understanding psu. Looks like my 8 pin is actually an EPS +12.
 
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It has one 6 pin connection on The PSU. and the supplied connector splits into two.

I don't think that I am supposed use the same connector split to fill both inputs on the graphics card. I was under the impression they have to be separate, correct me if I am wrong.
 
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It should be fine - the single wire before it is split is most likely a high enough gauge to carry enough power for both connectors since it is designed that way !
 
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delluser1 & JDFan - Take a look at the maximum wattage and current on the +12 volt rail(s). Published specs are too low for a 630 watt power supply. JonnyGuru did not do a technical review but he personally made negative comments about that specific psu in several of his forum threads.
 
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If I understood you correctly your power supply and PCI-e power cable is similar to my own. One end of the cable has a single connector that is plugged to the PCI-e connection on the power supply. The other end of the power cable is split into 2 PCI-e connectors that are plugged into one video card that requires 2 connections. That is perfectly normal. It should be okay.

Your video card came with a power cable adapter that has two 4 pin molex connectors on one end and a 6 pin or 6+2 pin connector on the other end. Normally that adapter is used when a power supply does not have a second PCI-e connection designed for use with a second video card for Crossfire or SLI mode. Although it would work, use of the adapter cable for a system with just one video card is not normally recommended.
 
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Solution



Excellent, Thanks...I am aware of my PSU having less than favorable reviews and I plan to replace it when I crossfire, but that won't be for a little while. Good to know I'm okay until then or until this one craps out.
 
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Your X650 has a 12 pin connector to that connect's to the psu and split's at the source into 2x pcie connectors, the OP's Raidmax has a 6 pin that connect's to the psu and leads to a 6 pin with a tail, kind of like this

2r2yiqd.jpg


One of the worst reviews out there, but at 3 min 32 seconds you can catch a glimpse of the pcie cable
http://www.youtube.com/watch?v=xfn5n6Y8G9A
 
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