Question What issues could happen using the mid range psu CX750M (grey label) with a RTX 3080 ??

[Gabriel_Herrera]

Hi, recently I upgraed my GTX1050 for the "Zotac RTX 3080 10GB OC Edition, my plan is using for apps like adobe substance painter, maxxon redshift, photoshop, unreal, autodesk maya and eventually games. My computer has the CPU is Ryzen 7 27000x, 32 GBRam, SDD, and the PSU CX750M (grey label). I know that is not the best PSU for that card but I dont have too much money. What could happen using that PSU ?? My video card could be damage ??? or only I will not get all the performance that could be get ??? . If not exist a serious risk of damage my hardware I don´t have problem using that PSU for some months before I could upgrade my PSU

 

[Phaaze88]

The worst that could happen:
Black screen to shut down.
Black screen to fan ramping up, then system hangs or shuts off.
You can lose unsaved work and possibly corrupt the OS if done enough times.
That's about the worst of it.

I know that is not the best PSU for that card but I dont have too much money.

This excuse gets used many times and it is not a strong one, leading to people often screwing themselves out of more cash.
"I didn't have too much money - but I got a 3080". Not a lotta cash, but still bagged a 3080... that doesn't add up.
You already knew the psu wasn't great partner for that gpu, yet what stopped you from stepping down a tier or 2 to a 3070 or 3060Ti - either of which still would've been a HUGE improvement over the 1050 - and using the difference from that 3080 towards getting a new psu at the same time?



The psu is the most important part in the PC, not the gpu. Sure you've heard that more than a few times.

 

[Gabriel_Herrera]

The worst that could happen:
Black screen to shut down.
Black screen to fan ramping up, then system hangs or shuts off.
You can lose unsaved work and possibly corrupt the OS if done enough times.
That's about the worst of it.

Ok thanks, if not exist a real issue of damage my hardware I´m goint wait 2 or 3 months unless I´d being experiment the issues that you mentioned. I can only really use my machine on weekends and maybe a couple of hours the other days . Today I was working on substance painter and I´m really happy with my new videocard

You already knew the psu wasn't great partner for that gpu,

No I dind´t, everything I know about PSUS was learned past 48 hours, watching youtube videos and reading sites like this. I only knew that rtx 3080 needs a 750watts, and my PSU is 750 watts. I know, it was not the smarter thing buying without looking more information first.

 

[Phaaze88]

No I dind´t, everything I know about PSUS was learned past 48 hours, watching youtube videos and reading sites like this.

I got that impression you did from the following line in the original post:
"I know that is not the best PSU for that card..."
It sounded like you had already done the research.

 

[Gabriel_Herrera]

I got that impression you did from the following line in the original post:
"I know that is not the best PSU for that card..."
It sounded like you had already done the research.

No problem, I was not be very clear. I was testing my new video card and is a huge difference compared with my old gtx 1050 but I´m not impressive if I comparte with the machine that I use at work. I expected much more performance.
Specs at work: Intel i7 77k, 24gb ram , GTX 1060 6GB, windows 10 pro.,
Specs at home: Ryzen 2700x. 32GB ram, RTX 3080 10GB., nvidia studio drivers, SDD,

I downloaded an unreal scene called "metahuman project"

View: https://www.youtube.com/watch?v=6mAF5dWZXcI
. At work I get 30 fps with the highest quality, and in my house I get 60 fps and not always, for some moments the performance down to 30 and then increase again. Would it not get more fps ?? The PSU could act like a bottleneck ???

I decided to buy the RTX 3080 beacuse of this chart https://www.cgdirector.com/redshift-benchmark-results/ but I know that making render in redshift is not the same as preview unreal scenes.

 

[Gabriel_Herrera]

I was reading old post saying that PSU could act like a bottleneck, but could be my case considering that CX750M is 750watts as nividia recommend ??

 

[Phaaze88]

I was reading old post saying that PSU could act like a bottleneck, but could be my case considering that CX750M is 750watts as nividia recommend ??

They're not exactly taking psu internal component quality into account. The recommendation is an estimation, and nothing more.
Besides, quality has always been over quantity.
Even among THIS LIST of 301 750w psus from partpicker, some of them will not manage to run the gpu for various reasons.


The 30 series gpus 'suck', especially at the upper end. This gen is one of Nvidia's worst - maybe it's their current worst - when it comes to power management.
Folks who have been getting by with cheaper psus get bitten, or will get bitten, and have to budget more money towards a better unit(again, wattage is second fiddle)...
Correction, not just cheaper psus apply either. The Corsair AX850 Titanium is apparently susceptible to the transient spikes from the upper end 30 series. I bought it before the issue became more widely known though.
Rumors so far suggest RTX 40 will be even worse...
On AMD's end, it looks like only the RX 6900XT and 6950XT cause problems.

View: https://www.youtube.com/watch?v=wnRyyCsuHFQ

Take a look through that when you have time.

 

[KyaraM]

Ok thanks, if not exist a real issue of damage my hardware I´m goint wait 2 or 3 months unless I´d being experiment the issues that you mentioned. I can only really use my machine on weekends and maybe a couple of hours the other days . Today I was working on substance painter and I´m really happy with my new videocard




No I dind´t, everything I know about PSUS was learned past 48 hours, watching youtube videos and reading sites like this. I only knew that rtx 3080 needs a 750watts, and my PSU is 750 watts. I know, it was not the smarter thing buying without looking more information first.

So data loss isn't an issue, only physical damage? What?

Get a new PSU. Also, research is conducted before buying components.