Hello from Russia!
Apparently, I have the same problem. I own Core P3(bought it in official retail store) for a year now. Several days ago I purchased new GPU and wanted it to be mounted verticaly and I took inclosed riser cable. First my PC booted with black screen(all was attached correctly). Second time it booted as normal, however GPU-Z said that GPU was working x16 1.1 instead of 3.0. It was all way long 1.1 on load or not(for those who will say it will become 3.0 on load). I want to mention, that GPU plugged directly to MB is working in PCI-E 3.0 from the start.
So, am I under warranty due to this situation? Is it possible to have the cable changed or it is working in PCI-E 1.1 as intended?
After having read all pages, I want to add that my inclosed riser cable has black clip and "Flyconn" label instead of "Thermaltake"
Unfortunately, it's not even possible to purchase premium TT cable as Russian Thermaltake website does not have it in stock.
Thanks for You help, and sorry for any mistakes I made.
