gpu problems new pc

[Adam trzaska]

hye my new pc specs are 

i5 2500

gtx 760

8gb 

250gb ssd

850w psu

 

the issue is that eveything works fine on the pc but the pc wont turn on if the gpu is plugged in and i dont know it uses 6+8pin the 6 is direct from the psu and braded cable to gpu and the 8 pin is 4 molex to 8 pin adapter with a braded cable going to gpu well basicly ive tired putting the the gpu into another pc and it works perfectly fine also the ssd and psu is brand new so cant be that the motherboard has been used before so i thought it might be the PCIE slot that broken is there any way to test that? also could it be softwear maybe drivers or something. basicly can anyone help me fix this?

[Sat1600]

Molex to 8pin is terribly unreliable. You need a PSU that can power that graphics card

[Fasauceome]

My Linux PSU is using a quad molex to 8 pin for my 760 and that causes hella problems. What's the make and model of your PSU?

[Sat1600]

Why does a 850w PSU only have one 6pin connector?

[Oalei]

Get another PSU like CX(m)/System Power (U)9. You won't want a burnt out components because you try something that work but not safe. 

[Fasauceome]

16 minutes ago, Sat1600 said:

Why does a 850w PSU only have one 6pin connector?

(Probably because it's not really 850 watts)

[Adam trzaska]

The 850w psu is the same that ones i used for my gtx 980 ti and 1080ti build its jsut a ace 850w psu and they always worked perfecr for me but took out the 760 and out a 750 that requires no external powers it jsut used the pcie slot and it still doesnt work only shows windows logo the dots spinning then black screen followed by no signal