Will my 650W psu work with a GTX 1080 ?

Calin_4 · Apr 29, 2017

Hello, i have a Rasurbo GAP656V2 and i want to know if i can upgrade to a GTX 1080 and run it with no problem.In the past i had a GTX 770 that run with no problem and later an GTX 780 ti that was making my PSU hot and in GTA 5 i experienced some sudden shutdowns i think due to the psu, but that 780 ti has an 250W TDP.
This 1080 only have 1x 8 PIN connector and 180 W TDP. I want to overclock it but if my PSU can't handle OC i am fine with stock.

My system specs are: CPU: I7 4790K No OC
Motherboard: Gigabyte Z97X-Gaming 3
RAM: CORSAIR Vengeance 1 X 4GB + 1 x 8GB noname
HDD: Western Digital Caviar Green 1 TB + Caviar Black 1 TB
GPU: Inno3D GTX 1060 6 GB
PSU: Rasurbo GaminX and Power 650W V2

GhislainG · Apr 29, 2017

This PSU https://rasurbo.com/RASURBO%202011%20eng/GAP656.html is closer to 500W (480W on the 12V rails) than 650W; therefore it's normal you had issues with a GTX 750 Ti. Since each 12V rail provides 20A you should be fine, but that's presuming it really provides 20A. If it doesn't, then your overclock will be limited. It's interesting that the 550W, 650W and 750W all provide the same 12V rails (20A x 2).

turkey3_scratch · Apr 29, 2017

I've never seen that thing in my life but I can assure you it's not good.

GhislainG · Apr 29, 2017

turkey3_scratch :

I agree and I still can't understand why people buy an expensive CPU and GPU along with a cheap PSU that could damage them if it fails.

weberdarren97 · Apr 29, 2017

GhislainG :

Seems you're correct in this... That PSU is terrible.

@Calin_4, please do not try to overclock with this unit. I don't want to see you kill your video card or motherboard.

Calin_4 · Apr 30, 2017

GhislainG :

I was running a 780 TI that was overclocked not an 750 TI. The shutdowns stopped after i removed the OC. Also the PSU offers 2x 8PIN power cables so i don't convert from molex.

GhislainG · Apr 30, 2017

Then you'll be fine, but I wouldn't stress that PSU too much because it could take other components with it if/when it fails.

DSzymborski · Apr 30, 2017

I wouldn't run a high-end GPU on that hec-made junk. High ripple, poor voltage regulation, crossload test fails, and it's not *really* a 650W PSU. The best use of this PSU is to run your computer for 5 minutes while you order a competent PSU.

weberdarren97 · Apr 30, 2017

GhislainG :

Where did you get any information to support this answer? I'd like to see a link to a PSU review of this model. From what I've seen, it's simply not made well enough to overclock.

If OP would overclock, and his power supply were to take his motherboard or graphics card with it when it dies, he probably wouldn't be having a very happy day.

GhislainG · Apr 30, 2017

weberdarren97 :

GhislainG :

Where did you get any information to support this answer? I'd like to see a link to a PSU review of this model. From what I've seen, it's simply not made well enough to overclock.

If OP would overclock, and his power supply were to take his motherboard or graphics card with it when it dies, he probably wouldn't be having a very happy day.

If the OP keeps on using that PSU, then he probably doesn't care.

weberdarren97 · Apr 30, 2017

GhislainG :

weberdarren97 :

If the OP keeps on using that PSU, then he probably doesn't care.

Whether he cares now or not, I bet he'll care when his system stops working.

GhislainG · Apr 30, 2017

If you read the complete thread, you'll realize he has already been warned a few times; ultimately it's the OP's decision to continue using it or not. He may not be able to afford a new PSU after spending so much on the other components.

Calin_4 · Apr 30, 2017

Thank you for the answers and i would probably would not OC that 1080. But until i will have the money to buy another psu i will run this how it is.

GhislainG · Apr 30, 2017

Calin_4 :

I agree with you.

turkey3_scratch · Apr 30, 2017

In general I like to equate running a bad PSU like eating big Macs every day and running a good PSU wasting grilled chicken, fruits, veggies. Both allow your body to function and survive but you die young with the big Macs.

DSzymborski · Apr 30, 2017

Calin_4 :

If you don't have the money for a 1080 and a safe PSU, you don't have enough money for a 1080.

Best of luck. Decisions have consequences and it's your GPU at risk, not mine.

Calin_4 · Apr 30, 2017

Thanks for the concerns, but i will take my chances. I run that 250 TDP with oc that was going over 250W for sure for about 1 year and the PSU still runs very good. So as i said with this 180W tdp card i don't think that i am in risk. Thank you anyway.

turkey3_scratch · Apr 30, 2017

Calin_4 :

That's the thing though, what do you mean by "runs very good". Cannot a PSU run while running poorly?

Calin_4 · Apr 30, 2017

I said that it runs very good because i have it for about ~3 years and i have only gpu's that surpassed 230 W tdp (GTX 770 Phantom) and the 250W(780ti), so by now i should have either my whole pc or the psu burned if the psu was as bad as you all say it is. I understand very well that it is not high end but by now i have no problem with it and i only go down in tdp from 250 to 230 to 180 now.

DSzymborski · Apr 30, 2017

Calin_4 :

I know people who drive drunk that haven't crashed yet. Doesn't make it smart, safe, or responsible.

GhislainG · Apr 30, 2017

DSzymborski, it's his money and system; please don't be upset because he doesn't follow your advice. A very large number of systems use a lower quality PSU and they still work fine. As he pointed out, he'll be using a GPU that draws less power than before.

Will my 650W psu work with a GTX 1080 ?

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