RTX 3080 power supply requirements - 850W?

[kiriakost]

I've hurt two 850w PSU's over the years while folding on old hardware, a Corsair and a Thermaltake. Always because I was pushing for max clocks over extended periods. I have seen over 950w come from an 850, but those 2 850s cannot put out anywhere near their rated wattage anymore. The rails are super bendy, and cannot sustain any kind of oc on that system.

Both PSU they can recover to full power if they get serviced by an expert in electronic repairs.
My HIPER 780W PSU (after 8 years ) this collapsed begging of 2020, I did refurbish it by my self ( I am expert in electronics repairs).
But I did feel the feeling of panic for a few minutes, just the idea that I had to deal with a 160 Euro of damage all the sudden when my wallet this was unprepared.
Nowadays I have also the CORSAIR CX750 and this is freshly repaired as it had a strange accident in the hands of another person, as one spare powerful replacement.

 

[R-T-B]

Yeah right. LOL

He says that about a lot of people. He said it about TPUs PSU reviewer lol...

I have no doubt he has some electronics knowledge, but his ideation around having a degree being EVERYTHING is frankly...

nevermind. If you can't say something nice...

 

[ppn]

SF600 can handle this, 10900K.

 

[kapone32]

Kind of. But it is an educated guess and has been done in similar way for a long while.
RTX3080 pulls 350W. High-end CPU pulls 200W, probably 250W if an Intel CPU. Some 50W for other stuff. Then add 30% just to be safe

Edit:
Did not actually calculate anything but looks like this guess was a closer than I expected:
350 + 250 + 50 = 650W * 1,3 = 845W

You forgot about the 3 to 8 RGB accessories.

 

[hat]

I feel like 850w for a single 3080 is a little overkill. I wouldn't expect to see a system with a single 3080 pull 850w unless it also had an overclocked HEDT processor, running both Prime95 and Furmark at the same time while you are rebuilding your 50TB RAID array because one of your 100 500GB discs failed.

 

[mrthanhnguyen]

Ax1500i able to power up 3090 and 10900k?

 

[EarthDog]

Ax1500i able to power up 3090 and 10900k?

..not sure if serious...

Twice over!!

 

[R-T-B]

Twice over!!

 

[Space Lynx]

SF600 can handle this, 10900K.

wow, my 700w gold psu should do just fine, especially since I might roll the 65w (peak 90ish watt) 4700x. big navi or rtx 3080 i should be sittin good. nice to know. thanks for the video

 

[kiriakost]

I am glad to see that also Optimum Tech he also confirmed my words regarding PSU wattage headroom.
From the other hand all PC users including my self here, we are incapable to guess if our PSU performance this has degrade over time.
But the new owners of RTX 3000 series, they earned the capability to test their own PSU after the installation of the card.
Such a load testing will prove at their own eyes of its one user, of how well stands his own used PSU at this new challenge.

Naturally if your PSU pops it protection at such load testing, buy a new PSU with out begging for help within forums.
Energy related problems they can find cure only by the use of your wallet.

 

[Assimilator]

NVIDIA 3080显卡功耗分析及750W电源兼容性情况 – FCPOWERUP极电魔方

www.fcpowerup.com

NVIDIA 3080显卡功耗分析及750W电源兼容性情况 – FCPOWERUP极电魔方

translate.google.com

I've had a look at the following website where several PSUs were texted with the RTX 3080, and it appears the peak load can be very high.

The recommendations of this tester were 850W for the RTX 3080.

Thoughts?

Here is also the peak power load from Igor's Lab

Thoughts: learn the dictionary definition of "peak".

 

[Bill_Bright]

From the other hand all PC users including my self here, we are incapable to guess if out PSU performance this has degrade over time.

Huh? Well of course that is not true at all! Any student of electronics, and many experienced PC users know that PSU performance naturally degrades over time - as do most electronics. Capacitor aging, for example, is a natural and unavoidable process and affects many types of capacitors used in PSUs and other electronics. It is so common in fact that the best PSU calculators adjust for it, as seen by the eXtreme OuterVision PSU Calculator (hover your mouse over "Computer Utilization Time"). While the affects of aging in modern electronics is not as prevalent as it once was due to using different chemistries, purer raw material, and better manufacturing techniques, aging still occurs. Of course compensation circuits can be designed and integrated into the device, but that adds to the complexity and cost. So with PSUs, it typically is easier to add a little extra buffer when sizing your needs.

No guessing required. PSU performance degrade over time.

And any qualified and properly equipped electronics technician can easy measure PSU output and compare it to previous measurements. So precise levels of degradation can easily be determined.

I am expert in electronics repairs

Hmmm, then how are you incapable of being able to guess if your PSU's performance has degraded?

Energy related problems they can find cure only by the use of your wallet.

Huh? Is something getting lost in translation? For sure, not all energy related problems require spending money. A loose ground wire in a wall outlet can wreck havoc but easily be fixed for free with a screwdriver. Of if you only have a left-handed Phillips, you may be out of luck!

 

[Frick]

He says that about a lot of people. He said it about TPUs PSU reviewer lol...

I have no doubt he has some electronics knowledge, but his ideation around having a degree being EVERYTHING is frankly...

nevermind. If you can't say something nice...

Remember this is the guy who thinks it's a good thing to withhold knowledge from people because they are not the worthy kings of electronics, IE the high and mighty engineers. He's a feudalist. I like him.

 

[kiriakost]

Remember this is the guy who thinks it's a good thing to withhold knowledge from people because they are not the worthy kings of electronics, IE the high and mighty engineers. He's a feudalist. I like him.

Good choice of words I can get along with that.
it's a good thing to withhold knowledge of people which are not ready to comprehend it, they do that at schools too.
There is no guy here, here is Mr. Kiriakos Triantafillou.

 

[Bill_Bright]

 

[John Naylor]

Theres a lot of malarky oft being parrotted on many sites in threads of this type from days were it mattered and where it never mattered. For example, several myths busted here:

Single vs. Multiple +12V rails: The splitting of the +12V rail

What is "multiple +12V rails", really? In most cases, multiple +12V rails are actually just a single +12V source just split up into multiple +12V outputs each with a limited output capability. This is what "OCP" is. "Over Current Protection". It's a protection in the PSU's housekeeping IC...

www.jonnyguru.com

But there is no universal wisdowm that can be applied here ... as with most tools, the goals and level of need varies so must the solutions.

There are many capable sites out there with this information.

MSI GeForce RTX 3080 Gaming X Trio Review

The GeForce RTX 3080 Gaming X Trio is MSI's flagship RTX 3080. It comes with a large overclock out of the box, and the cooler is massive. This is the fastest RTX 3080 we've tested so far, and it's the quietest as well. Wow, and that with a classic triple-fan design that doesn't use any fancy...

www.techpowerup.com

"Recommended PSU: 700 W "

MSI GeForce RTX 3080 GAMING X TRIO review

In this review, we benchmark the GeForce RTX 3080 GAMING X Trio from MSI; yes MSI is back with a new Gaming X Trio, with that TRIO, of course, short for a triple-fan solution with an otherwise heavil... Hardware setup | Power consumption

www.guru3d.com

" Here is our power supply recommendation:

• GeForce RTX 3070 - On your average system we recommend a 550 Watt power supply unit.
• GeForce RTX 3080 - On your average system we recommend a 650 Watt power supply unit.
• GeForce RTX 3090 - On your average system we recommend a 750 Watt power supply unit.

If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina. "

Things to remember when selecting PSU wattage rating... It's not just about staying away from the point where something blows up. I generally go at about 1.25 to 1.50 times calculated average gaming load:

a) The closer you get to the rated wattage, the more likely the PSU will see decreases in voltage ability and electrical noise and short term peaks will exacerbate these.
b) The close you get to the rated wattage, the greater than fan noise. I'd love to see reviews noting the point at which semi passive PSUs go from no fan to fan spinning
c) The closer you get to the rated wattage the worse the efficiency point. A Titanium PSU at 100% load is as efficient and will produce as much heat as a Gold at 50% load

There is no one size fits all solution to PSU selection. Your average user, serious gamer, heavy overclocker and noise nitpickers all have varying degrees of need and will be looking for PSUs with different characteristics. If ya calculate average gaming load of 500 watts, 625 (+25%) is as low as Id go ...If moderately overclocking with big GFX load, and calculated 625 - 650 watts , Id go 850. If going for the best possible OCs and bigger loads and targeting dead silence while system was running at say 725 - 750... Id go 1050

On this box I am typing from, I had a calculated load of 780 watts including overclocks and dual 23 watt pumps. ... never considered a 850, Had a 1050 on build list but the same Seasonic 1250 was cheaper, Im looking over that the case now while I type this, AutoCAD running on 2nd screen, system is being cooled in passive mode, all case fans, rad fans and PSU fans are not spinning, pumps speed is at 25% My 2nd oldest son had a 850 EVGA G2 on his build list w/ SLI build ... the 1000 G2 was cheaper and tho expected it to be quiet at load , it was the noisiest thing in the build ... asked around various forums and reactions were mixed ... most said their's was fine, but many said they had same issue. It failed and was replaced, but replacement had same issue... he changed GFX cards and now had a Seasonic Gold + 750 w/ single card which is very quiet. He's going to be replacing that with a water cooled 3080.

 

[EarthDog]

A Titanium PSU at 100% load is as efficient and will produce as much heat as a Gold at 50% load

Sorry, what? Part of the 80Plus metric is taken at 100% load and 50% load. The difference is the few % between them.

EDIT: Oh I see what you are saying. And you are correct.

That said, the problem is that nobody in their right mind runs at 100% anyway, so that's pretty much a moot point, no? People, IMO should be around 60-80% load depending on several factors... as you mentioned, tolerance of noise being one of them as they get louder running closer to their nameplate value. overprovisioning by 50% is just wasting cash in most cases though.

On this box I am typing from,

You don't have a system listed...

 

[agent_x007]

Sorry, what? Part of the 80Plus metric is taken at 100% load and 50% load. The difference is the few % between them.

And 20%. And also 10% for Titanium only rating : https://en.wikipedia.org/wiki/80_Plus#Efficiency_level_certifications

 

[DRDOOM]

Thoughts: learn the dictionary definition of "peak".

I am fully aware these figures represent peak load. Which is exactly why I created this thread - I was curious to know if 850W is actually preferred in a power supply to be on the safe side?

 

[EarthDog]

I am fully aware these figures represent peak load. Which is exactly why I created this thread - I was curious to know if 850W is actually preferred in a power supply to be on the safe side?

That has been answered...

A 750W will be plenty on most situations including overclocking.

 

[NesteaZen]

Igor in Germany his is the only reliable source so far for making electrical measurements over PC hardware.

while I agree, I raise you Aris / hardware busters over at youtube. I guess due to the lack of audience his content is somewhat scattered and not as organized/clear-cut as igor's write-ups.

aris' baby https://www.techpowerup.com/265702/...ed-psu-testing-and-certification-protocol-1-1

 

[Deleted member 203344]

Well I looked at it with a more simple approach .. i use a EVGA 3080 ftw ultra running 450w bios so i started with that ... added an allowance for 200w on CPU as its overclocked and another 150w for everything else .. this gave me around 800w.
Ideally you should be running PSU's around 80% capacity for longevity and at their ideal efficiency rating so for me i settled on a Corsair 1000w PSU.
Hope that helps.

 

[Sandbo]

850W isn't too expensive nowadays anyway; PSU is the last thing I will save on.
I always overkill on PSU, and have got 1000-1600W on my different system for an overhead of ~ 200-400W.

 

[Space Lynx]

I wonder how much a stock 5900x will pull on watts... it says 105w but i imagine even if i leave everything default it will still boost to 150w?

 

[Sandbo]

I wonder how much a stock 5900x will pull on watts... it says 105w but i imagine even if i leave everything default it will still boost to 150w?

The TDP really tells little about the power:

The AMD Ryzen 9 3950X Review: 16 Cores on 7nm with PCIe 4.0

www.anandtech.com

.
My guess is it will be comparable to 3950X, so this maybe a good reference.