PSU Help

ChrisLandin · 11 May 2024 at 11:15

Hi guys.

Quick bit of background with my problem.

I have a itx system compromising of a 3700x, asus x570 itx board, 32gb ram and a rtx 3070. I started getting very frequent shutdowns of the system and after me testing it all I came to the conclusion the mobo was at fault. So I swapped it out for an atx version rebuilt the system and low and behold the same issue started again.

So I now think its possibly PSU related. I had a Corsair sfx unit 750w platinum. The great people at Corsair rma'd my psu and the new one has arrived today. Before I unwrap and install it does the psu have enough grunt for my system?

Thanks in advance

mickyflinn · 11 May 2024 at 11:47

Power spikes on a 3070 can be upto 400w so I think you should be ok, average usage is way lower.

Tetras · 11 May 2024 at 14:01

ChrisLandin said:
Before I unwrap and install it does the psu have enough grunt for my system?

It should do, SFX PSUs are usually capable of exceeding their rated wattage by quite a lot too, by design (I assume because of the expected heat and lack of airflow in SFF PSUs).

freddie64 · 12 May 2024 at 08:06

I am using one to power my PC and not had any problems, i have read it can run a system with a 3090 so you should be ok.

ChrisLandin · 13 May 2024 at 16:36

Thanks guys. I've put it all back together and its working a treat.

Blackwhite · 16 May 2024 at 21:43

It is more than enough power for your system

ChrisLandin · 17 May 2024 at 19:00

Blackwhite said:
It is more than enough power for your system

Thankyou

freddie64 · 18 May 2024 at 08:43

Sorry for the thread hijack Chris but it could be relevant to you as well.

Does anyone know if this cable will work on my 3080?

My basket at OcUK:

1 x Corsair PCIe 5.0 12VHPWR Type-4 PSU Power Cable (CP-8920284) (SKU: CA-272-CS) = £18.95

Total: £22.94 (includes delivery: £3.99)

I was going to get one made up from a cable modding place but when i asked they said it does not fit.

I am sure i have seen it mentioned that it does work but can't find the post/thread.

Just want to stop using the extension/adapter, but want to future proof at the same time.

ChrisLandin · 18 May 2024 at 09:19

freddie64 said:
Sorry for the thread hijack Chris but it could be relevant to you as well.

Does anyone know if this cable will work on my 3080?

My basket at OcUK:

1 x Corsair PCIe 5.0 12VHPWR Type-4 PSU Power Cable (CP-8920284) (SKU: CA-272-CS) = £18.95

Total: £22.94 (includes delivery: £3.99)

I was going to get one made up from a cable modding place but when i asked they said it does not fit.

I am sure i have seen it mentioned that it does work but can't find the post/thread.

Just want to stop using the extension/adapter, but want to future proof at the same time.

No problem mate. I hope someone can help you. As for me that cable isn't required.

tamzzy · 18 May 2024 at 09:33

freddie64 said:
Does anyone know if this cable will work on my 3080?

no it will not work. the 30 series nvidia gpus featured it's own proprietary 12-pin connectors that are not PCIE standard.
if you're using a corsair psu...this is the one you need: https://www.corsair.com/uk/en/p/pc-.../cp-8920274/12-pin-gpu-power-cable-cp-8920274
with respect to "futureproofing", then buying this cable will not futureproof your psu, as it is solely for the 30 series gpu only, so a bit of a waste of money

freddie64 · 19 May 2024 at 06:30

tamzzy said:
no it will not work. the 30 series nvidia gpus featured it's own proprietary 12-pin connectors that are not PCIE standard.
if you're using a corsair psu...this is the one you need: https://www.corsair.com/uk/en/p/pc-.../cp-8920274/12-pin-gpu-power-cable-cp-8920274
with respect to "futureproofing", then buying this cable will not futureproof your psu, as it is solely for the 30 series gpu only, so a bit of a waste of money

Thanks tamzzy, i don't think i will bother.

It is a 3rd party extension i am using not the Nvidia one so does not look to bad and it is working fine.

JollyJamma · 24 May 2024 at 06:18

ChrisLandin said:
Thankyou

Just so you know, the SF750 watt can deliver 900 odd watts before running into any issues - it’s a very solid psu and I’m surprised that you had issues as a it’s very popular and generally regarded as excellent.

I’m sure that there are some failures even in very reliably PSU models like the SF750 so yeah.

JollyJamma · 24 May 2024 at 06:19

freddie64 said:
Thanks tamzzy, i don't think i will bother.

It is a 3rd party extension i am using not the Nvidia one so does not look to bad and it is working fine.

Don’t risk it. Just get the compatible one. You don’t want to blow your psu or machine or create a fire.

ChrisLandin · 24 May 2024 at 19:27

JollyJamma said:
Just so you know, the SF750 watt can deliver 900 odd watts before running into any issues - it’s a very solid psu and I’m surprised that you had issues as a it’s very popular and generally regarded as excellent.

I’m sure that there are some failures even in very reliably PSU models like the SF750 so yeah.

Thanks for that mate. I agree Ive never had an issue with a Corsair psu before however the old one was definitely at fault. Since the RMA'd psu has been installed in the system Ive had no issues whatsoever.