New psu not booting

[Ronbaow]

Hey!

So i installed a new psu EVGA supernova 750 G2, old one was Corsair cx600m.

When i turn my pc on on, it says

"Reboot and select proper boot device or insert boot media in selected boot device and press a key_"

I checked if everything is plugged in correctly and seems like everything is connected correctly. 

I checked BIOS and seems like it doesent detect my HDD but it detects my SSD. 

After looking around i found that it doesent detect the SATA coming from my HDD to MOBO. No power on my HDD even though its plugged in?

+ is it ok to have two different 8pin VGA cables coming from PSU to my GPU?

+ i had to disconnect 1 ram chip while i was trying disconnect old MB cable

i7-4790K

16gb ram 2x8

Gtx 980ti

SSD 850 EVO 250Gb

HDD 1tb WD Blue desktop hard drive

 

Help would be much appreciated!

 

[STRMfrmXMN]

1 hour ago, Ronbaow said:

 

+ is it ok to have two different 8pin VGA cables coming from PSU to my GPU?

+ i had to disconnect 1 ram chip while i was trying disconnect old MB cable

 

 

As long as both cables came with your G2 yes, that should be completely OK.

OK, that should still result in the system booting.

 

I'd just rebuild the whole thing and clear CMOS.

[Ronbaow]

45 minutes ago, STRMfrmXMN said:

As long as both cables came with your G2 yes, that should be completely OK.

OK, that should still result in the system booting.

 

I'd just rebuild the whole thing and clear CMOS.

I unplugged everything changed the old ssd power cable to new one. Pc just wont detect hdd...