Is a seasonic s12iii 550W Bronze+ Enough for a gigabyte RTX 2080Super OC

[dirtyferret]

Yeah, I researched it a bit after the fact ...
What's the lowest model Seasonic makes, the Focus?

technically they still make (made) the S12ii before they gave RSY the iii but yes the focus series would be the lowest modern series

 

[Deleted member 205776]

I can vouch for the CX 650 as well. It is a great and reliable PSU, probably the bottom line when it comes to budget. Ran my 3900X and 3070 just fine until I switched over to a higher end Seasonic. Quiet and with flexible cables too. It now serves as my backup PSU.

 

[Eskimonster]

If i had the PSU infront, i would give it a go. If not, i think a 650w or higher would be preferred.

 

[Dhops]

My 3070 and 3900X manage to only put a 310W load on my UPS. Keep in mind that this is WITH my 65W monitor (and 15W secondary monitor) connected to the UPS. You're fine. That unit may not be the best Seasonic unit but it'll work (I would honestly replace it ASAP with a Focus GX-650 or something).

I will make sure to replace it in the future or if any issues arise.

 

[ColinB123]

You should be:



Could you link the article this was taken from? From what I can see, the CPU's pulling around 100W, with PCIe/PEG at 350-ish. That suggests a 3090, yeah? All else being equal, OP's 2080 would shift the 12V Total down about 125W, putting average/continuous load at something like 300-350W, and peaks in the 550 range. ISTR conversation about the 3080/3090 being pretty "burst-y", and folks with 650W PSUs that should have been sufficient having issues. I don't think Turing spikes as badly as Ampere, though. S12iii is rated for 546W on +12V and 550W continuous. Coupled with a 3600, I'd expect average load of around or under 300W, which should leave an acceptable amount of headroom. However, I wouldn't fault the OP for grabbing the G3 that 46K linked above; its a much better unit.

I can't find the article either! But yes, you surmised correctly, the article, if I remember, featured a 3090.

But that wasn't the point of my reply: I wasn't thinking, or trying to indicate, the total power of this combination. Indeed, I never mentioned the absolute value. The point was to illustrate the ratio of peak to average power use in a way that could be seen (thanks to Igor). I think I exaggerated, though: I think the ratio is more like 1.5:1, rather than 2:1.

Here's a more recent article, showing the same issue: the ratio of peak to average, with spikes > 20ms. The 3070 is running at +9% power limit (which is where I run my own 3070 when benchmarking). I've included the URL (this time!).
I'd guess the average of the yellow curve is just below 400w, while the peak is around 550w. Maybe not 50% uplift, but reasonably close.
It seems to me that +50% of the aggregated power use, is the minimum one should be targetting.

 

[Deleted member 205776]

I can't find the article either! But yes, you surmised correctly, the article, if I remember, featured a 3090.

But that wasn't the point of my reply: I wasn't thinking, or trying to indicate, the total power of this combination. Indeed, I never mentioned the absolute value. The point was to illustrate the ratio of peak to average power use in a way that could be seen (thanks to Igor). I think I exaggerated, though: I think the ratio is more like 1.5:1, rather than 2:1.

View attachment 197013

Here's a more recent article, showing the same issue: the ratio of peak to average, with spikes > 20ms. The 3070 is running at +9% power limit (which is where I run my own 3070 when benchmarking). I've included the URL (this time!).
I'd guess the average of the yellow curve is just below 400w, while the peak is around 550w. Maybe not 50% uplift, but reasonably close.
It seems to me that +50% of the aggregated power use, is the minimum one should be targetting.

How to deal with this: undervolt your Ampere cards. These cards are overvolted to hell from factory. Undervolting my 3070 allowed it to run cooler, draw less power, and have increased clocks. (2085-2100 @ 950mv, from stock 1995-2010 MHz @ 1050mv). Now draws 180-220W instead of 240-250W all the time.

 

[Decks]

technically they still make (made) the S12ii before they gave RSY the iii but yes the focus series would be the lowest modern series

Focus series isn't the lowest modern series, Core is, core itself is a Focus GM/GX but re-branded and downgraded

 

[watzupken]

Personally, I won't run it with a 550W PSU. Previously I owned a GTX 1080 Ti and I upgraded my 550W PSU to a 750W. Based on measurement from the wall, under full load, my system rarely exceeds 450W. But with high end cards, you need to factor in the transient power requirement that can spike quite a fair bit. If your PSU can't manage it, it will likely trip. I feel if the manufacturer is recommending a certain PSU requirement, its usually the worst case scenario. If you know you have a solid PSU, then I think its safe to shave 100W off the requirement. Beyond that, you risk overworking the PSU or cause it to trip. The stock RTX 2080 Super's recommended PSU is 650W, but I think an overclocked version should bump this up to 700 to 750W.

 

[xtreemchaos]

i would not risk it, seasonics are very good psu's but you would be very close to the limit of the 550w, id go for a 750w because its better to have more and not need it than to need it and not have it.

 

[tpu7887]

I bought a 500W SilverStone SFX-L (80 Plus Gold) power supply for my system before I knew I'd be getting a 3080. It ran my 9600K at 5.2GHz all core static (1.43V) with the 3080 perfectly fine. One day my 3080 died in its sleep, so with the store warranty I got my purchase price refunded which I used to pick up the only card they had available - a 375W model 3080 from Gigabyte. It worked fine until I installed a certain game and had everything, including AA, cranked. I'd experience a random shutdown or two per couple hours of playing. So, I had to upgrade. I looked for a unit that put out quality power and was very efficient. I also like to future proof things, so I made sure that no matter what I bought in the future, it'd power it. After some looking, the MSI MPG A850GF is the best you can find - you get the most for the least, the quality of its power output is literally second to one, and it'll run any hardware, and although it's rated Gold, it's rating at 20% is Platinum, and 50% is just 1% under Platinum.

A good 850W PSU will run 850W continuous and is capable of handling transients. I don't know why everyone seems to have an obsession with transients. Power supplies have capacitors in them which are capable of delivering current orders of magnitude greater than than the PSU's continuous rating, (and quality power supplies have larger capacitors), so as long as transients are *actually* transients, there's nothing to worry about. The *only* worry is if the PSU is substandard, then there's more than just handling of transients to worry about.

The MSI A850GF should be able to run a 450W GPU with a reasonable overclock, along with with an overclocked 12900K/13900K. Maybe not FurMark + Prime95 small FFT simultaneously, but any real world load - just fine.

PSUs last a very long time - the A850GF has a 10 year warranty and will probably last 20+. I have an Enermax from 2001 on my 3700x/6600XT (both overclocked )

If you end up needing a new PSU, I suggest it. It cost $139 CDN on sale from 189, so probably $100-110USD on sale. MSI MPG A850GF. The two PSUs it competes with cost almost double, and in some aspects where the A850 isn't on par or a hair below, it's better.

Edit: I see you don't want to spend if you don't have to. I would say you don't have to. If you notice any instability though, your power supply is probably faltering/on its way out, and I would fully recommend going for the A850GF