Thanks for all the suggestions guys, So this is what I have tried to get it working;

- Changed the riser, iv used different risers of the same version(008c) and 1 version 007s riser
- tried all 3 different power options and combinations of them
-Tried 2 different PSU, both high wattage
- changed the motherboard
-flashed old bios, and used the bios of similar cards
-forced gen 1 PCI

This is the really weird one, I taped the PCI pins on the GPU so that only the 1x pins in the front were exposed, I plugged the card into the 16x slot and it worked like a charm, fans could be controlled. Then I plugged the 1x riser into the same 16x slot, plugged the GPU into the riser, and it didn't work This tells me it's riser related, but it looks like a signaling issue and I have no idea how to fix it.

So nothing iv tried worked, please let me know if I missed something. Keep in mind it's not all my 1660 supers have this issue, only the Palit and rog cards.

The only thing left to try is a ver 009 riser, but from my understanding, the only difference is the power input option?

Thanks again for the help thus far.

Hi Everyone,

So very weird issue, I have a rog strip 1660s and a palit 1660s. The fans will not spin when plugged into a riser. Both cards are detected and work fine, their hash rates are on par with bench marks, but the fans refuse to spin, Iv tired multiple different softwares to get them going but no luck. As soon as I plug them into a 16x slot on the board, I can control the fans.

I have check the risers and changed them, used different brand and versions but still no luck, Iv also tried flashing different vbios with no results...

Mobo has been forced to 2nd Gen, 4g decoding enabled, and bio updated. Power is plugged into both riser and GPU . Keep in mind my msi gaming x 1660s works fine. PSU is a 1200w and this problem occurs with just one card plugged in

Iv run out of ideas, are manufactures doing this on purpose to stop mining ? These cards are brand new, 1 week old.

Anyone got any ideas or solutions ? I would greatly appreciate it, I can’t be the only person having this issue.