New psu won't work, old one still works

emzett1 · 8 Sep 2021 at 11:27

Hi There,

I recently openend this thread in CPU's: https://forums.overclockers.co.uk/threads/cpu-bottleneck-ryzen-9-3900x-rtx-3080-ti.18936885/ and did more and more research.

One of my fears is that my PC is drawing too much power and my PSU is running at almost 100%. I am a noob, so cant confirm or did not exactly check.

So I upgraded from my 750w psu to a 1000w psu.
OLD: GAMDIAS KRATOS P1 G 750 W 80+ Gold Certified Semi-modular ATX Power Supply
NEW: be quiet straight power 11 1000w

After installing the new PSU my PC would not turn on anymore.
Things I can confirm:
- PSU is turned on
- Lights on Mobo Show (So it receives power)
- All cables are connected correctly. Did that 4 times.
- Old PSU still working fine after all.
- When pressing the power on button on the PC the PSU does a click noise but nothign will happen. Clicking noise only comes once. After that it doesnt do anything anymore.

How is it possible, that a less premium and less w psu works and a brand new psu with higher quality and w is not?

Please let me know if you have any idea why the new one does not work if you have any ideas.

emzett1 · 8 Sep 2021 at 11:46

EDIT: No Fans turn on.

EsaT · 8 Sep 2021 at 15:16

Did you change all modular cables to BeQuiet's cables?

Jay85 · 8 Sep 2021 at 16:05

sounds like a dead psu to me, possibly something inside shorting it hence the relay click.

I'd send it back tbh.

edscdk · 8 Sep 2021 at 16:12

EsaT said:
Did you change all modular cables to BeQuiet's cables?

like what he said,

also have you plugged all the cables in the right way round... it is possible to force some of the (im thinking the 4/8 pin one by the CPU particularly)

keenan · 8 Sep 2021 at 16:20

Have you tried with just the 24pin and 8pin CPU cables?

emzett1 · 9 Sep 2021 at 18:44

keenan said:
Have you tried with just the 24pin and 8pin CPU cables?

I did. not turning on.

edscdk said:
like what he said,

also have you plugged all the cables in the right way round... it is possible to force some of the (im thinking the 4/8 pin one by the CPU particularly)

cables connected are not the issue. All of them were secured and correctly inserted. There is no chance I did that wrong. I repeated it 4 times to be sure. Same result.

EsaT said:
Did you change all modular cables to BeQuiet's cables?

I only have bequiet cables. the other one was not modular.

edscdk · 11 Sep 2021 at 09:06

emzett1 said:
I did. not turning on.

cables connected are not the issue. All of them were secured and correctly inserted. There is no chance I did that wrong. I repeated it 4 times to be sure. Same result.

I only have bequiet cables. the other one was not modular.

There are only 2 options, the psu is faulty or you are making the same mistake each time and not realising it..