You can use those cables just fine, just plug in the one connecter and tuck the “pig tail” underneath to hide it.

Fair enough. I would like an official response to confirm.

hotpersuit1
Fair enough. I would like an official response to confirm.

This is not the place to ask for official statements.  This is a user-to-user forum.

hotpersuit1
I recently got my hands on an evga ftw 3 ultra gaming 3080 and with it I purchased an evga 850 GQ power supply. I understand the 3080 needs three separate 8 pin power connectors, but my power supply only came with split 2x8pin cables. Do I need 3 single 8pin cables or will 3 split cables be fine?

There is literally a post about this like 10 posts down... look for the "PSA: Do NOT use Daisy Chains for 3000 series!!! " post

hotpersuit1
Awesome, this is the info I was looking for. I love buying a 160$ PSU from the same company as the card and not getting the recommended cables for my GPU.

What's wrong with the cables which came with your PSU?  They are fine.  Use them.
 
Your PSU has four GPU connection points.  Your PSU came with four cables.  Use three cables and leave each's daisy-chained + 8 disconnected and dangling.
 
Good to go.

hotpersuit1
I'm reading everywhere that single cables are recommended and that daisy chained cables are bad for the 30 series as they deliver too much or too little power. I'd rather return this PSU for one with single cables from a reputable brand and not have to worry about anything.

You are misunderstanding what you are reading.  There is nothing wrong with cables with daisy-chained connectors.  Just don't use those daisy-chained connectors if you can avoid it.  Having extra unused connectors dangling won't hurt anything.  A connector which isn't plugged into anything can't "deliver too much or too little power".

facepalm

I mean, that's not how electricity works.

I'm not going to argue with you. Believe and do whatever you want. I tried. You don't believe me. Peace.

hotpersuit1
I'm reading everywhere that single cables are recommended and that daisy chained cables are bad for the 30 series as they deliver too much or too little power. I'd rather return this PSU for one with single cables from a reputable brand and not have to worry about anything.

Thats not what people say. Even if you get modular sleeved cables by corsair they come with pigtail cable. You can ignore the pigtail (tie wrap it carefully with the main cable and make sure no connector touches anything) OR (which I would NOT recommend) you can use 1 6+2 and its pigtail to plug 1 and 3 pcie slots of your GPU and on slot 2 you add a separate 6+2 and leave its pig tail hanging or tie wrap it.
 
HOWEVER:
 
The best thing to do is put 3 SEPARATE pcie cables leaving their pigtails carefully hidden or hanging (as long as their connections don't touch something) and you will be perfectly fine. The electricity delivered will be EXACTLY the same as a pcie cable without the pigtail. ON CONTRARY, the pigtail cable MAY deliver a bit less electricity and thats why we don't prefer it for main connection.
 
Hope this helps and clarifies the issue.

thanks for the info, I need to buy a new PSU