How bad is daisy chaining?

[OnionRings]

So I got a 3090 and I have an 850w, well it only has 3 pcie slots, 1 is going to the PSU and 2 to the GPU, so I basically had to daisy chain one plug. So it has 2 dedicated plugs and 1 daisy, plus the board power.

 

Using hwinfo seems ok, if im looking at the right stuff. Its pulling upwards of 479w, with pin 1 and 2 at 154 each, and pin 3 which I assume is the daisy chain, is pulling 104w, and then idk what the board label is but I assume its the PCIE +12V and that is at 66w, mind you these are the maximums after doing furmark donut 6500 on kombuster for 14 minutes and counting.

 

No computer shut downs, at least not yet, is this fine??

 

Core clocks are at 1725 max of 1875 when idle, memory is at 2438 same max, need to google if those are in line with whats rated. 

 

Edit: I realize a computer shut down would only happen if I trigger OCP, so I need to run my CPU as well, but I think 850w is fine I just need to make sure the card itself is getting all it needs. 

 

Edit: Its turboing much higher than 1725 while gaming, maybe it was just settling during furmark idk, starting at 1920 while gaming and slow came down to 1800s. Framerate is about the same as my 3070 Ti in RE4 (havent tested anything else yet) because of a slight CPU bottleneck, but at least the annoying vram limitations are gone. 24 chonkin gb of vram all mine now.

[BuzzingBee]

If I were you, getting over 375W total is entering into unsafe territory and would rather undervolt or get a new PSU with more PCIe connectors. I don't want worst case scenario to happen which is to have wires melting and PC getting caught on fire. 

[Mick Naughty]

Seems to clock low, so wouldnt worry about it in real world. Only run my 3090 on two 6 pins straight to the psu. Mine sits at 1950 for hours. Never had a power issue with my 850watt. 

[OnionRings]

9 hours ago, BuzzingBee said:

If I were you, getting over 375W total is entering into unsafe territory and would rather undervolt or get a new PSU with more PCIe connectors. I don't want worst case scenario to happen which is to have wires melting and PC getting caught on fire. 

Thats the total tho, each wire isn't holding that much, I don't know what each wire is rated for, but they each take about 154 max according to hwinfo.

[BuzzingBee]

1 hour ago, OnionRings said:

Thats the total tho, each wire isn't holding that much, I don't know what each wire is rated for, but they each take about 154 max according to hwinfo.

Iirc it's 150W per cable, so one of the cable that is daisy chained to 3rd slot is actually using up around 150+100=250W total. I suppose you could get away if psu cables are thick, but again I prefer going safe route by using seperate cable per slot or undervolting. 

[OnionRings]

1 hour ago, BuzzingBee said:

Iirc it's 150W per cable, so one of the cable that is daisy chained to 3rd slot is actually using up around 150+100=250W total. I suppose you could get away if psu cables are thick, but again I prefer going safe route by using seperate cable per slot or undervolting. 

Well, the cables weren't hot as far as I could tell, just slightly warm but it also had the fins blowing on them. I imagine if they were going to light up, they'd be physically hot.

 

I could do a longer test like an hour of a heavy benchmark or more furmark, then check the temps of the cables.