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Hello I'm building a rig and everything works when I mine without risers just with my GPUs in pci 16 slots in motherboard. But I am trying to expand and use risers. I tried sata adapters to 6 pin that come with risers and usb gets too hot, I tried using 6 plus 2 pin splitter connected to one of the 8 pin cables that powers gpu and usb got even hotter and bubbled. I did some research and people say that I need to use 8 gen risers and not 6 gen risers that I use. So I just ordered 8 gen risers that have sata upfront without any adapters, will those work? My psu only has 2 gpu slots which I already use, ready are sata, and 2 cpu 8 pins and 2 unmarked 8 pin slots. Does anyone have 3070 rig that uses risers and my type of psu? How do you power those risers?? Thanks a lot)

You really shouldn't be using SATA based risers as you're setting yourself up for a potential fire. SATA's power handling and gauge of cable isn't up to the task to supply enough power to the riser for it to perform at spec.

You should be using 6 Pin preferably as it supplies more than the 75W of power that the riser needs to perform.

Only use the 6Pin's on your risers and use the VGA 6+2Pin's for your GPU's!

Yup I got these risers which don't have sata. I'll be using 6 pin to power them:
https://gpurisers.com/product/preorder-gpurisers-com-newest-version-riser-6-pack-end-of-january-ship-date/

Lol for 59$ per risers? That's way too costly for just a riser, I'm actually using the 006 risers here and I don't see any hot on the sata cable, maybe this have something to do with the way you connect the power? Are you using double power supply?

SATA is not designed to carry 75W.

I've used SATA connection for my riser for months without any fire outbreak, I don't know what to say but it seems that power supply are not on same levels, the thickness of cable that powers my 6pin and 8pin GPUs is the same as the thickness of my SATA cable, honestly powers supply matters

WRONG! Regardless of the PSU manufacturer that doesn't stop the fact that the 75 Watts that can be delivered through the PCI slot exceeds the technical capacity of SATA cabling and connectors.