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Can I use 2 pcie 8 pin cables and one Daisy chained cable for rtx 4080?

Bhookalaga
By Bhookalaga
in Graphics Cards
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Currently, I use a Corsair rm 850 psu. It has 2 pcie 8 pin cables on the psu, each of them splits into 2 (6+2 connectors). So, according to Nvidia website 4080 16gb version require 3 pcie 8pin cables, can I use my 2 pcie cables and 1 Daisy chained one for the 3rd connector? Please help

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Posted

I don't see why not each 16-gauge cable can handle 300W easily.  Corsair has a 600W 2x8pin to 16pin cable so you don't need adapters.

 

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Yes, that's how you do it. Daisy chained 8 pins can deliver 150W+150W.

 

Daisy chained cables got a lot of bad press, because manufacturers used 18AWG cables on old power supplies and daisy chained them. 

 

Corsair RM850 has proper 16 AWG daisy chained cables which have no issues. 

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I don't see the 4080 even using the entire 300W.  With just minor tuning I max out at 360W on my 4090 but its frequently under 300W.

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Nothing is going to explode, it's gona work, but there have in the past been some strange performances issues using daisy chained cables on specifically NVIDIA cards. Not sure if those are still around, just check that you are getting the expected performance once you've got it all plugged in and new drivers cleanly installed

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  • 2 months later...
Posted

Got the MSI 4080 suprim X, which came with a small note, that recommended not to daisy chain the supply but instead use three separate cables. However, I don't have a third cable, and it seems I would only be able to get a cable from cooler masters EU store, which I bet will take forever to get here.

 

According to the data sheet for the MSI 4080 its power consumption is 320 W. With what is stated above, it seems I would be save running two separate PCIe 8-pin and daisy chain one of those cables to the GPUs power adapter?

 

My PSU is a Cooler Master V850 SFX gold.

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