So I decided to upgrade my gtx 745 to Rx 570. Unfortunately I don’t have 8pin connector from PSU so I decided to remove 15 pin sata from CD drive and use it with an converter. I was doing it with a friend, the converter needed a 2 15pin sata connector to power 1 8-pin GPU connector. My friend removed the sata power from the hard drive and tried to run it like that (I know he doesn’t know a thing). After that, I reconnected HDD but pc doesn’t post at all. There is a weird buzzing sound comes out of motherboard. Idk what is wrong. I have i-4770, 12gb of ddr3 ram, and plenty juice for GPU from PSU(about 500w). It makes the same noise with my gtx 745, intel onboard graphics as well.
A week later...
I got a new PSU from thermaltake 600 watt with 8-pin connector, hooked it up. Works perfectly with gtx 745.
More on my pc specs, motherboard is IPMB7-MP.
Anyway, there is no beeping noise anymore btw (yet). I installed Rx570 and it does not post anything on the screen, it is just black. I have disabled INTEL on board graphics and Nvidia drivers didn't work. in bios, I disabled PCI SERR# Generation and reboot. Then I tried enabling PCI VGA Palette Snooping, no luck again. I have reset the CMOS by removing the battery. But now there is a beeping noise coming from my motherboard and I don't know what should I do at this point. Please help. Rx570 still doesn't post. I am so frustrated from this process. I have no clue why PCIEX16 3.0 lane would not recognize rx570 and works fine with gtx 745.