Question Any chance for damage using single pci-e cable for both connections on graphics card.

[silversmithy]

I'm currently in the process of testing a few used graphics cards, a GTX 1060 3gb, and a GTX 1660 super. The 2 PSU's that I am using are also to be tested which are a Seasonic Prime Ultra titanium 650w, and a Seasonic SSR 750 G Series. The SSR 750 only has the permanently connected 2x8 pci-e connection coming directly from the PSU, and I received no other cables with it. The Prime Ultra titanium is fully modular, and I only have one single cable with the 2x8 connection.

I know using one cable for both connections on the graphics card is not recommended, but would it be overall stable for just simple functionality testing?

Please advise.
Thank you

 

[boju]

For those two cards be fine. If you were dealing with 3080Ti or higher then power draw would cause wires to get a little warm.

 

[silversmithy]

Okay, thank you. How about light gaming for a few hours. Older NFS games specifically.

 

[boju]

Can play whatever you want for as long as you want. 1660s isn't all that power hungry.

 

[geofelt]

If the connection is 6 + 6 or 8 +6 you are ok.
It is the 8 + 8 connection that can send too much current on the single cable.

 

[sizzling]

I had the same Prime Ultra Titanium 650w and used it with a 3080 with 2x8 pin connectors. Normally I ran both cables but there was a few months where I tested a soundcard that required its own pcie power connection. I therefore ran the gpu on one cable and the soundcard on the other. It worked fine. I know it’s not recommended.

 

[silversmithy]

Okay thanks everyone. I am going to start by testing an old GTX 460, and 560. They are both (2) 6 pin if I remember correctly. I have another pci-e 6+2 pin cable that according to Seasonic's compatibility chart shows it will work with the Prime Ultra. The pci-e cable that came with the Prime Ultra is RG34, and the other pci-e cable I have on hand is a CG04. Thanks everyone.