As I already said I have RX 580, RX 570 and 3 5700 XT (14 GPUs in total). All cards running on risers 006c. All of the GPUs running fine except the 3 5700 XT which have random glitches. Changed everything: cables, risers (but always 006c), PSUs nothing worked. Do you think this is an opinion or a fact?
There is nothing that even remotely suggests the problem is the model of riser.
That's called jumping to conslusions and makes problem solving more difficult.
Instead of saying you've done "everything" how about listing the things you've tried, in detail,
without bias.
Have you tried the 5700XTs in different slots? x16 slot without riser? different rig?
Probably not because you already bought the new risers with the pretty LED and you just
want confirmation to make you feel better. If so fine, the LED will fix everything.
Yesterday I received my 009s risers and I swapped all of the 006c being used with my 5700 XT cards. First of all they look promising because my most problematic Power Color card is now running steady at 1200 mhz without crashing (I had to under clock at 1100 because with 006c was crashing randomly and very frequently - after 1 hour, 10 minutes, 3 hours, etc etc without a specific pattern).
Overall the RX 5700 XT cards with 009s till now didn't crash or restart at all my rig, I guess time will tell if I was right or wrong but it is looking good.
youre doing is nothing will effect the stability, basically other 6 pin pcie is same source as the other one, so nothing happen if you using 2 power