Cablemod extensions vs PSU cables

[nave.h9]

Hey guys, currently own a Seasonic X850 PSU and using a custom 8+6 GPU cable from Cablemod (not extension).
Thing is I'm going to mod the psu shroud I made for my NZXT Phantom 410 soon and add a hole for the GPU cables, and the 8+6 doesn't really look that good.
So a couple things came in mind:
1. Can I somehow just cut the 6 pin add-on and keep the 8 pin? Is it safe?
2. If not (technically if so as well), should I pick up extensions or just sleeved cables? Frankly I'm leaning towards the extensions because the sleeved ones seem to have extra cables for some reason (I.E. several connectors leading to one specific connector, which is bugging me)

Thanks for the help!

 

[Aeacus]

I take that you have a CableMod 2x 6/2-pin PCI-E power cable in use and you want to get rid of one 6/2-pin PCI-E connector of said cable, right? Rather than cutting perfectly good CableMod PCI-E power cable, use a CableMod PCI-E power cable that has only one 6/2-pin PCI-E connector.

Under the spoiler are few images of both cables (click on spoiler to view),

Spoiler

Top left: CableMod 2x 6/2-pin PCI-E power cable in packaging.
Top right: CableMod 2x 6/2-pin PCI-E power cable in use with my Haswell build.
Bottom left: CableMod 1x 6/2-pin PCI-E power cable in packaging.
Bottom right: CableMod 1x 6/2-pin PCI-E power cable in use with my Skylake build.

Both cables are part of a CableMod SE-series ModFlex cable kit and you'll get three 2x 6/2-pin PCI-E and two 1x 6/2-pin PCI-E power cables in the kit,
link: https://cablemod.com/products/?filter_series=se-series&show_products=48

 

[nave.h9]

I take that you have a CableMod 2x 6/2-pin PCI-E power cable in use and you want to get rid of one 6/2-pin PCI-E connector of said cable, right? Rather than cutting perfectly good CableMod PCI-E power cable, use a CableMod PCI-E power cable that has only one 6/2-pin PCI-E connector.

Under the spoiler are few images of both cables (click on spoiler to view),

Spoiler

Top left: CableMod 2x 6/2-pin PCI-E power cable in packaging.
Top right: CableMod 2x 6/2-pin PCI-E power cable in use with my Haswell build.
Bottom left: CableMod 1x 6/2-pin PCI-E power cable in packaging.
Bottom right: CableMod 1x 6/2-pin PCI-E power cable in use with my Skylake build.

Both cables are part of a CableMod SE-series ModFlex cable kit and you'll get three 2x 6/2-pin PCI-E and two 1x 6/2-pin PCI-E power cables in the kit,
link: https://cablemod.com/products/?filter_series=se-series&show_products=48

 

[nave.h9]

First of all you had it wrong. I don't have 2 of the 6+2 cables, I have an 8+6 pin. That's basically an 8 pin with a 6 pin extension from its connector.
Question was, if I'm going to use the configurator any way (since I'm using a special colored sleeved cable set), should I get PSU Cables or the cheaper extensions?

 

[Aeacus]

Actually, i wasn't wrong. 6/2-pin is the same as 8-pin, also called as 6+2 pin PCI-E power cable,
image:

and i do get that you have an extra 6-pin connector on that PCI-E power cable that you don't need since it doesn't look right.

It doesn't make much difference if you're going to use power cable extension or a new power cable that has only 6/2-pin connector at it's end (as with the one i'm using with my Skylake build). Though, using power cable extensions adds additional resistance for the current and the longer the extension cable is, the greater the resistance and voltage drop. While in general it's fine to use power cable extensions, make sure that those are high-quality and doesn't melt under a high load.

You can even cut the extension off if you so desire. Just make sure you isolate the loose ends so that they won't touch anything and cause a short. Better way is to open up the 6/2-pin connector and remove the extension power cables completely. This way you don't have any hanging cut power cables.