3080TI Founders Edition unexpected shutdown issue

[xPETEZx]

It's all a load of tosh.

Any half decent 850W power supply is fine for a normal build containing a 3080 / 3090, that's basically the end of it.

It does feel like the needle of "any PSU will do" of a few years ago has swung to far in the other direction of "Only a 1500W Titanium + £600 PSU can handle a 3080"

I'd say the multitude of videos, reviews and customer complaints would say you're wrong - The high current peak transient draw of the 3090 especially has been shown to cause some PSU's in some systems to fail so the claim of "Any decent 850w PSU..........." isn't 100% accurate.

So whats your remedy? Everybody go buy 1600W PSUs?

The spikes need to be high enough to trigger the OCP on a rail on the PSU right? Otherwise it wont trip. If we go with 550-600W as the DC load for a system with a 3090 in it, that would mean these spikes needing to be nearly 300W high to trigger OCP? Nearly double the rated power of the GPU...

Dont get me wrong.... faulty or just bad PSUs exist. So not denying that people have had PSU issues with 30 series cards. I myself was one. A brand new RM750i caused me issues at just 3 months old. But it wasnt the wattage that was the problem... it was simply a faulty PSU.

 

[heatonpkmassive]

I'd say the multitude of videos, reviews and customer complaints would say you're wrong - The high current peak transient draw of the 3090 especially has been shown to cause some PSU's in some systems to fail so the claim of "Any decent 850w PSU..........." isn't 100% accurate.

I wouldn't bother, he's clearly correct because he says he is, while not telling us where we can find info to back up his claims

@xPETEZx the remedy is what I stated earlier, to put in inline smoothing capacitors, which some manufacturers have done.

 

[Felon]

I'd say the multitude of videos, reviews and customer complaints would say you're wrong - The high current peak transient draw of the 3090 especially has been shown to cause some PSU's in some systems to fail so the claim of "Any decent 850w PSU..........." isn't 100% accurate.

There are thousands of people running 3090s with 750W bronze PSUs (of which I'm one) who've never ever had a problem and never will have a problem, even the damn vendor (Nvidia) say that 750 / 850W PSUs are fine......

Most people are running 850W without any issues at all.

Even the pre-built high-end PCs that OCUK themselves build, are using 850W PSUs.

the remedy is what I stated earlier, to put in inline smoothing capacitors, which some manufacturers have done.

This just sounds like snake oil to me, like expensive silly "directional" hifi cables or something.

 

[ianh]

I doubt it's the level of the spike but more likely the rapid increase in the leading edge rising rate which is tripping the protection i.e. the speed at which the current increases forces the PSU to go into OP so it shuts down "before" the spike reaches a set threshold, rather than letting the spike hit and then cutting power, which seems to be why those PSU's with better smoothing circuits can better handle these transient spikes as they slow the demand rate.

So again, nobodies saying "you need a 1600w PSU" but instead that it would be better to have a new one with better smoothing circuitry, rather than an older one, even if it's more powerful.

I wouldn't bother, he's clearly correct because he says he is, while not telling us where we can find info to back up his claims

Gotta love the internet, it really brings out the best in people

 

[neeb]

Quick question for you guys when a 3080 finally comes my way!, when you say it’s best to connect to gpu to the psu by two separate rails what do you actually mean I currently have a Corsair modular psu so is it basically not to use two plugs next to each other ?

 

[xPETEZx]

I doubt it's the level of the spike but more likely the rapid increase in the leading edge rising rate which is tripping the protection i.e. the speed at which the current increases forces the PSU to go into OP so it shuts down "before" the spike reaches a set threshold, rather than letting the spike hit and then cutting power, which seems to be why those PSU's with better smoothing circuits can better handle these transient spikes as they slow the demand rate.

So again, nobodies saying "you need a 1600w PSU" but instead that it would be better to have a new one with better smoothing circuitry, rather than an older one, even if it's more powerful.

Ok thats interesting.

While I was having black screen reboots curtesy of my failing RM750i, I swapped over to an ancient 11-year old HX750 I had. This PSU had not been used in a system for over 5 years.
I was very nervous to connect it to my new gear at all. But that thing worked like a champ for nearly a month while I had to RMA the 750i twice...
Not a single black-screen reboot or any other issue.

So just an anecdote of even a very old PSU handling a 30 series card without issue.

 

[Felon]

I wouldn't bother, he's clearly correct because he says he is, while not telling us where we can find info to back up his claims

So, most of the system builders like OCUK and their competitors, are using pretty average 850W gold PSUs in their 3090 pre-built PCs, which are going for £4k+, why do you think this is?

I also just checked, 3 different system builders - and none of them are shipping 3090 pre-built systems, with anything bigger than a 850W PSU. (Some of them are even using 750W for their 3080 systems)

 

[Kenpachi2k]

UPDATE:
Sending my current PSU for RMA and get a replacement 48hrs-72hrs from them recievinig my PSU.
I have managed to scrap some money up to get a decent PSU to use in the meantime > Seasonic Focus GX 850 80+ GOLD PSU (LTT Tier list - A Tier single rail) which I can return within 14 days of purchase.
Although I haven't tried testing out removing connected drives from the power, which I'll try before I send out my PSU for RMA.
I have also read on many reddit threads that my specific PSU (EVGA GA supernova 850w) has this same exact issues with others using it to power their systems with 3080s and 3090s - assuming its a fault by design across the board?

 

[heatonpkmassive]

So, most of the system builders like OCUK and their competitors, are using pretty average 850W gold PSUs in their 3090 pre-built PCs, which are going for £4k+, why do you think this is?

I also just checked, 3 different system builders - and none of them are shipping 3090 pre-built systems, with anything bigger than a 850W PSU. (Some of them are even using 750W for their 3080 systems)

So where exactly did I say this happened with all brands of power supply?

Give up, you just want to win an argument. Try reading the posts eh.

 

[Felon]

Give up, you just want to win an argument. Try reading the posts eh.

You don't need anymore than a "average" 850W PSU to run a 3080/3090.

 

[heatonpkmassive]

Gotta love the internet, it really brings out the best in people

Yeah, totally. So whereas I gave a specific example of a brand that had the issue, what was clear from my post if you don't have the brain of a turd was that I was not referring to all 850w power supplies. That's why I gave one example, at no point did I say that all power supplies of that wattage suffered this.

But yeah, takes being able to read and comprehend so may as well not bother. His last comment about not needing more than an average power supply shows 100% that he does not get my point, so no point making it to some people as they'll never get it.

 

[BUDFORCE]

Looking at the technical specifications of that power supply versus the graphics card.

I'm struggling to get proper power draw specs for a 3080ti, but it's stated 350w under load.

That's about 30a, even at a stretch all things overclocked etc 40a absolute max, probably not close to that.

PSU states 80a max out on 12v rail.

No reason it shouldn't power that.

I can't see it being other devices either.

The overprotection theory might be solid, or the power supply is some other way faulty or has a design flaw, because on paper it's plenty.

 

[heatonpkmassive]

Looking at the technical specifications of that power supply versus the graphics card.

I'm struggling to get proper power draw specs for a 3080ti, but it's stated 350w under load.

That's about 30a, even at a stretch all things overclocked etc 40a absolute max, probably not close to that.

PSU states 80a max out on 12v rail.

No reason it shouldn't power that.

I can't see it being other devices either.

The overprotection theory might be solid, or the power supply is some other way faulty or has a design flaw, because on paper it's plenty.

At risk of not making myself clear, it has been seen in some cases that the 30 series of cards and even earlier have transient power spikes that trigger the protection circuits in some power supplies, the irony being that in some cases an 'average' power supply would actually fare better than one or two more expensive brands. That is also the reason why not everybody here understood what I was saying further up the thread.

So while on paper, it all looks good, it seems this was a thing but that it was also corrected by inline smoothing capacitors that prevented the power supply's protection circuitry from triggering with the spikes. Because the power supply components could handle them, it was the overcurrent protection circuitry that was too sensitive.

 

[BUDFORCE]

At risk of not making myself clear, it has been seen in some cases that the 30 series of cards and even earlier have transient power spikes that trigger the protection circuits in some power supplies, the irony being that in some cases an 'average' power supply would actually fare better than one or two more expensive brands. That is also the reason why not everybody here understood what I was saying further up the thread.

So while on paper, it all looks good, it seems this was a thing but that it was also corrected by inline smoothing capacitors that prevented the power supply's protection circuitry from triggering with the spikes. Because the power supply components could handle them, it was the overcurrent protection circuitry that was too sensitive.

It's certainly possible.

 

[heatonpkmassive]

It's certainly possible.

There are examples that can be found online and the OP's unit could be a pre mid 2019 rebadged Focus Plus Gold, so it's definitely possible. Some EVGAs are based on the Focus Plus platform. Is it likely? Hard to tell. But if the OP's unit has the inline smoothing caps, then I'd say it's much less likely the problem is the power supply. If it doesn't, testing with another known good unit is a good idea as this could be the reason for the shutdowns.

 

[heatonpkmassive]

 

[KompuKare]

Always nice to read all these strong opinions on PSUs!

What I did find amazing is that almost nobody blamed the 3080/3090/3080Ti problems on Nvidia's design (or AMD for the 6900XT's design).

Either they designed it while testing only with the best PSUs, or they knew the problem and ignored it. Neither looks good on them.

 

[Kenpachi2k]

After testing with the new PSU running heaven maxed, multicore cinebench, broadcasting a stream and a game all at the same time finishing a full 10 minute cycle. The system didn't shutdown once where as it would shutdown 1-2 minutes after launching a game whilst running this test setup that I have done.

Issue stemmed from EVGA Supernova GA 850w PSU. Many thanks all!

 

[IT Troll]

Great to hear you identified the root cause and now have a stable system.
I have the EVGA Supernova G2 850W PSU. Who'd have thought a single letter make all the difference.

 

[xPETEZx]

After testing with the new PSU running heaven maxed, multicore cinebench, broadcasting a stream and a game all at the same time finishing a full 10 minute cycle. The system didn't shutdown once where as it would shutdown 1-2 minutes after launching a game whilst running this test setup that I have done.

Issue stemmed from EVGA Supernova GA 850w PSU. Many thanks all!

Great news. Black screen reboots/power offs almost always seem to be PSU.

Which model did you replace it with? Still got RMA open with EVGA?

Great to hear you identified the root cause and now have a stable system.
I have the EVGA Supernova G2 850W PSU. Who'd have thought a single letter make all the difference.

I bloody hate that. Only thing worse is when they keep the same name for vastly different units.
Like corsair unfortunately.... the HX750 line has existed for over a decade... yet the actual model has changed completely. So always need to include the year.

I know it keeps name consistent...but still confusing.