I've seen too many people reporting dead 3080s and 3090s where a daisy chain power cable is in use.

In the interest of data collection post here if you use daisy chains and if you've had to RMA your GPU for any reason.
Or post if you don't use them and had issues, use them and had no issues, etc.
If you've ever had an issue using a daisy chain on any other GPU throw it in here also because why not. The focus is on 3080 and 3090 though.

The idea is to get a decent sample to see if there is a correlation worth looking into deeper. Maybe it is an issue, maybe not. We won't know for sure until we start looking into it though.

I'll start with myself:

3080 FTW3 Ultra, now on Hybrid Kit since Tues(12/29) and GPU itself installed on 11/13/2020.
No daisy chain used, no issues. (I'm using only one plug of a daisy chain for the third connection because the PSU doesn't come with 3 single cables, that's fine though. The 2nd connection not in use doesn't do anything except be annoying for cable management.) I am OC'ed on on the 450W XOC bios now, I stayed on stock bios until I installed the hybrid kit.

Although on my previous 2070 non super I used a daisy chain when I first got it. I had not OC'ed yet either(I did later, I always run at stock for at least a week, sometimes more, to make sure it works properly before I apply any OC). I had issues with instability and crashes until I stopped using a daisy chain. The PSU is the same 1000W EVGA Supernova Gold G3 I'm using now. Also it should be noted the crashes and instability came over time, it was not immediate. And it all stopped immediately when I stopped using a daisy chain.

Nope...It's a bad idea, really
 
I always use two separate cables.
 
 

 
 
I have 3 separate PCIE cables, full replacements certified for my PSU.  I use a Phantek 1200 Watt Revolt-X PSU.
 
3090 FTW3 Ultra

Three separate PCIe power cables - Corsair AXI 1200W using CableMod Pro ModMesh C-Series cables (PSU set to Single Rail OCP)
 
3090 FTW Ultra using the standard OC BIOS - no issues

2 factory cables, one daisy chained, to my 3080 FTW3 Ultra

ty_ger07
Yet another one of these threads?

Yes, until we have a definitive answer. 

If using daisy chains is causing issues it would add value to get correct information out there.

If I'm wrong and proven wrong with facts and evidence I'll stfu.

transdogmifier

Intoxicus

ty_ger07
Yet another one of these threads?

Yes, until we have a definitive answer. 

If using daisy chains is causing issues it would add value to get correct information out there.

If I'm wrong and proven wrong with facts and evidence I'll stfu.

It's pretty simple...the cables aren't rated to carry the power the inputs request/are spec'd for.
 
You daisy chain it and exceed the power the cable is designed to carry, you got problems.
 
Don't.....Do....It.
 

Agreed.

EVGA Jacob is telling people it's safe and it's confusing the issue.

Unlocked by me. Moderators - please do not lock again.

The poll I did, while not definitive, shows more cards that were wired with dedicated cables to each block died vs those daisy chained.

mx353

rz22g
The poll I did, while not definitive, shows more cards that were wired with dedicated cables to each block died vs those daisy chained.

You think people are gonna admit that they daisy changed a GPU? 

Yes there are people in the poll that stated they daisy chained. Its anonymous so its not like EVGA is going to look at their username and say they voided their warranty.... using the split cable we provided you with our EVGA power supply ;)   And I will admit it. My 2080TI has been since release.

mx353

rz22g
The poll I did, while not definitive, shows more cards that were wired with dedicated cables to each block died vs those daisy chained.

You think people are gonna admit that they daisy changed a GPU? 

Why not?
Most people that use them refuse to accept any possibility they could be bad idea so I doubt they will find anything negative about posting here. If anything people will want to prove me wrong by showing me their daisy chain works.

It doesn't void the warranty so there is nothing for anyone to worry about that way.

If anything we might have reported user bias in that people that do have issues will not want to post to avoid an "I told you so."

I'm not judging anyone for what they post here. This is purely information gathering.

Intoxicus
(probably because of you reporting it.)

Because of me reporting it? What? That's a baseless accusation.
 
Anyway, this other thread has a lot more interesting discussion going on, so please let one of them die.  Choose one or the other.

Intoxicus

transdogmifier

Intoxicus

ty_ger07
Yet another one of these threads?

Agreed.

EVGA Jacob is telling people it's safe and it's confusing the issue.

This is why. and I will be honest, when I was building mine and looked at the daisy chain cables evga puts in the box.  ANywho, I switched mine out yesterday but i've been running a 3090 for over a month with no issues.

If the cable cannot carry the power it would not damage the card in any way other than physical due to cables overheating.
Once the physical limit of the cables current capacity is reached it would burn out like a very slow fuse, on a modular psu that burn out damage is just as likely at the psu connector as it is at the gpu connector.
 
Insufficient power would likely mean unstable system and complete system crashes (the gpu isn't the only draw on the 12v line)

I did on my 3080 FTW3 Ultra out of necessity until I got a new power supply, it worked with 1 &3 chained, I think it would be fine if you are not running the most taxing games like MSFS2020  or when running and Undervolt profile to be safe;
Ampere architecture is amazing, I have an 850 MV profile that can Port Royal 11442 and only draw 267 Watts