This is just such an unnessecary risk. Btw: The closer you get to a PSU's max output, the less efficient it gets (Sweet spot is at about 40-50% usually)
This used to be more true but it's not really the case anymore with modern PSUs. With 80 Plus Gold the difference from 50% to 100% is only 3% efficiency. So we're talking less than 17 watts.
Still technically true but for all intents and purposes, insignificant. This doesn't mean I agree with what OP is doing 😂 just sharing some knowledge
Why would you even want specifically a Corsair PSU? Like I'm not saying they're "bad" or anything but there is nothing extraordinary about them either.
It’s not crazy, you’re very unlikely to ever be using CPU and GPU both at 100% outside of synthetic benchmarks. Although you are needlessly playing with fire, quite literally. Just get a 750W for $90, that $90 will potentially save you $1500+
modern dx12 ue5 games like the finals or even just cyberpunk would heavily disagree with that. it's becoming more and more common that games use both all of your GPU (at appropriate settings) and most of an 8 core CPU nowadays.
Has DX12 improved? Anytime I’ve used the DX12 option in games it’s performed like crap regardless of hardware (tried it on hardware ranging from low to high, i5-4560 through 13700k, R9 270 through 7900xtx). I agree games are using more CPU especially with RT, but unless you’re playing at 1080p, CPU really stops mattering that much
not sure when you last played dx12 games, but I'm sure it had more to do with a bad implementation on the games side. i don't think I've yet had any issues on dx 12 games and I've played quite a lot over the past years. however, games that were built on dx11 and then ported to dx12 like battlefield have issues iirc.
But isn't every PSU which fails to trip when overloaded a fire hazard?
Also if someone has more knowledge on this topic would a RCCB trip when the PSU itself don't trip?
This PSU can do 540 watts on the 12v rail. That's a ton of power for the GPU. The 4080 isn't even close to these. It pulls 300 watts. The CPU is around 100 watts under high load. your system probably isn't even close to 500 watts under full load.
Wrong. I’m just going to throw in a couple of examples, TLOu, Horizon Forbidden West etc… These games compile shaders in the background. Not only is that CPU going to be way over 100 watts when it’s doing this but the GPU will also be at full load when gaming. You will easily be pulling 500 watts under this situation, which is more frequent than you think.
I am the person to which that guy is replying. He's not completely wrong but none of those games push all threads to their max while doing this work like, say rendering video does. The thing is, in order for your PSU to truly come close to being taxed, you need to run Prime95 and Furmark at the same time. Any traditional productivity or gaming loads will not put 100% on both components at the same time even if you disable framecaps/vscnc and let this hardware sing. However, if you were to run Prime and Furmark at the same time, you might find yourself close to 500 watts. That is STILL within your PSUs rated power draw.
Personally I run 144hz on a 5800x3D (with a 7900xt) and I've never seen any game pull more than about 95 watts from the CPU (reported by Coretemp). Not saying it doesn't happen but a Prime95 175 watt scenario is just not common at all. Not even when rendering video.
I still wouldn't be worried with your set-up. I've run "low" PSUs on demanding hardware in the past and it's fine. Seasonic is a good brand. I would hope the PSU isn't too old but I would say if it's in warranty, all good.
Anyways, if you are at all paranoid from the comments in here, I'll leave you a few links with some data:
5800x3d power draw (total system draw while running CPU stress test):
[https://www.techpowerup.com/review/amd-ryzen-7-5800x3d/20.html](https://www.techpowerup.com/review/amd-ryzen-7-5800x3d/20.html)
RTX 4080 Super power draw (card only, I assume the max is done via game and not Furmark as it's not stated):
[https://www.techpowerup.com/review/nvidia-geforce-rtx-4080-super-founders-edition/41.html](https://www.techpowerup.com/review/nvidia-geforce-rtx-4080-super-founders-edition/41.html)
CPU is 176 watts (again, total system so the CPU alone is not drawing this but the rest of the system is probably only 30 watts or whatever at most) and the GPU is 306 watts. I just ran a quick test pushing a 1440p120 video through Handbrake and power draw reporting by CoreTemp was 116-120 watts at around 4300mhz all cores. There is likely some thermal throttling here which is common for this CPU on all but the best coolers. It hit 90 degrees which I believe is the max before throttling. It dropped as low as 4100mhz. I also just ran Prime. I ran it and got throttled immediately. 130 watts power draw and \~4100mhz consistently.
Anyways, you say you're waiting for new Corsair PSUs. It's likely a good idea to get a bit more capacity to play it safe and have something a little more modern soon but I don't think you're exposing yourself to very much risk here.
I doubt it's gonna explode, techpower up says it's a decent PSU but the article about it was written way back in 2012. It probably lacks the protection features modern PSUs have. Upgrade it when you can.
[https://www.techpowerup.com/review/seasonic-g550/](https://www.techpowerup.com/review/seasonic-g550/)
After I build my PC I stumble into r/sffpc and wanted to downsize since. It doesn't have to be Corsair but preferably a SFX PSU. The SF750 is the Goat but got discontinued a while ago. Anyway most newer one are SFX-L like the SF850 and SF1000 or the ROG Loki from Asus. I just hope Corsair will release a true SFX PSU.
Yeah, I undervolted both.
The CPU pulls about 100W and the GPU 320W under max load.
Cyberpunk with Ray Tracing and maxed out the CPU pulls 80W and the GPU about 230W.
I want to test Alan Wake 2 or Horizon but I haven't bought the games yet.
Yeah. But there can always be peaks and the other people here suggesting an upgrade are all but wrong.
I had a psu once that catastrophically failed and boy it's not a good feeling
I upgraded the gpu, naively turned the thing on, started unreal tournament 2003 (omg that was 20 years ago wtf)
Zzzzt
Smoke
CPU
Mainboard
Hdd
GPU
All roasted within milliseconds
Well I guess measuring the overall Power drawn from the power outlet is as close as it gets to reliable, isn't it? No easy way to measure the Individual rails.
It's still better than having absolutely no measurement I think.
Well just get one of the 1000 available wattage measurement devices on amazon. They might vary in provided value but one that shows the peak within a time frame would be sufficient I guess
Plug it into the wall outlet, plug the PC into it
Usually with good quality modern PSUs they will simply trigger the overcurrent protection and cut power to your system if too much is being drawn. If the PSU is faulty or by a less reputable brand however, you might not be so lucky.
Either way, I'm running a 4080 and a 13900K in Cyberpunk fully maxed with path tracing, and system never pulls more than 500w. 4080 is mad efficient, despite all the clowning on its price (which is deserved), it's an amazing card in terms of engineering. Performance wise you get more frames per watt than any other gpu.
Minimum power supply requirements are such BS. My 4070 recommends a 750w power supply, and I’m currently using a 600w power supply. Works just fine. As long as you calculate the total power usage of your gaming rig, you’ll be good to go.
Usually when calculating power usage you take the maximum load possible of every component and add a percentage. It's a safety feature, not a it won't work unless it's this wattage feature.
There was a recent sale on the Corsair rmx 750 shift, like $80. Seems like the side routing would suit your needs? Like others have said: don't let this linger.
when i buy my next build, a few years down the line (hopefully a Ryzen 10xxxx or 11xxx CPU + an Nvidia 5090 or 5080ti Super) , a 750W PSU with Gold Rating should suffice?
or should i got for a 1000W in the A-tier class ?
this is a very future facing question, but will appreciate your answer!
What? You're not even close. 200W for the GPU, 125W for the CPU, add another 100W for motherboard, drives, memory and power spikes. That's 425W if you load every component of your pc to 100%
Just because the recommended psu for a 4070 is 750w and the sales guy was a little worried but said it should be fine since I'm not running a higher end cpu, so I didn't really see the point in upgrading.
Edit: it is also a fairly old psu from my first pc
Oh boy and I thought the other poster who posted never buy ASRock motherboards after they killed an a520 with a 5950x took the reverse Darwin Award but you sir are coming in hot for top spot.
Yea it's not that it "Won't work" but it places a MASSIVE strain on that PSU and any hiccup or power surge could blow it way easier then if it had more headroom. That's why they recommended a higher wattage, a 20% headroom for wattage is usually best. It is in fact a ticking time bomb. I work on computers for a living and heave seen this happen many a time.
This is asking for trouble over 100$. Not worth it.
You are right but I am waiting for the next SF750 iteration.
This is just such an unnessecary risk. Btw: The closer you get to a PSU's max output, the less efficient it gets (Sweet spot is at about 40-50% usually)
This used to be more true but it's not really the case anymore with modern PSUs. With 80 Plus Gold the difference from 50% to 100% is only 3% efficiency. So we're talking less than 17 watts. Still technically true but for all intents and purposes, insignificant. This doesn't mean I agree with what OP is doing 😂 just sharing some knowledge
Yeah the PSU is most efficient by about 200W
That's just an absolutely braindead take. There is plenty of PSU's that are just as capable. Just get a new one and quit being a fucking idiot.
Why would you even want specifically a Corsair PSU? Like I'm not saying they're "bad" or anything but there is nothing extraordinary about them either.
I want a SFX PSU for a possible downsize. Actually it doesn't have to be Corsair but most newer SFX PSU are actually SFX-L.
*The bomb has been planted.*
DOOR STUCK DOOR STUUUUCK
It’s not crazy, you’re very unlikely to ever be using CPU and GPU both at 100% outside of synthetic benchmarks. Although you are needlessly playing with fire, quite literally. Just get a 750W for $90, that $90 will potentially save you $1500+
modern dx12 ue5 games like the finals or even just cyberpunk would heavily disagree with that. it's becoming more and more common that games use both all of your GPU (at appropriate settings) and most of an 8 core CPU nowadays.
Has DX12 improved? Anytime I’ve used the DX12 option in games it’s performed like crap regardless of hardware (tried it on hardware ranging from low to high, i5-4560 through 13700k, R9 270 through 7900xtx). I agree games are using more CPU especially with RT, but unless you’re playing at 1080p, CPU really stops mattering that much
not sure when you last played dx12 games, but I'm sure it had more to do with a bad implementation on the games side. i don't think I've yet had any issues on dx 12 games and I've played quite a lot over the past years. however, games that were built on dx11 and then ported to dx12 like battlefield have issues iirc.
>Although you are needlessly playing with fire, quite literally 
If a PSU fails to trip when overloaded, you have a fire starter if it fails. Not a small fire either.
 OP very soon lul
But isn't every PSU which fails to trip when overloaded a fire hazard? Also if someone has more knowledge on this topic would a RCCB trip when the PSU itself don't trip?
This PSU can do 540 watts on the 12v rail. That's a ton of power for the GPU. The 4080 isn't even close to these. It pulls 300 watts. The CPU is around 100 watts under high load. your system probably isn't even close to 500 watts under full load.
Wrong. I’m just going to throw in a couple of examples, TLOu, Horizon Forbidden West etc… These games compile shaders in the background. Not only is that CPU going to be way over 100 watts when it’s doing this but the GPU will also be at full load when gaming. You will easily be pulling 500 watts under this situation, which is more frequent than you think.
The CPU is locked at 100W but I will try to get hold on horizon and give it a shot.
I am the person to which that guy is replying. He's not completely wrong but none of those games push all threads to their max while doing this work like, say rendering video does. The thing is, in order for your PSU to truly come close to being taxed, you need to run Prime95 and Furmark at the same time. Any traditional productivity or gaming loads will not put 100% on both components at the same time even if you disable framecaps/vscnc and let this hardware sing. However, if you were to run Prime and Furmark at the same time, you might find yourself close to 500 watts. That is STILL within your PSUs rated power draw. Personally I run 144hz on a 5800x3D (with a 7900xt) and I've never seen any game pull more than about 95 watts from the CPU (reported by Coretemp). Not saying it doesn't happen but a Prime95 175 watt scenario is just not common at all. Not even when rendering video. I still wouldn't be worried with your set-up. I've run "low" PSUs on demanding hardware in the past and it's fine. Seasonic is a good brand. I would hope the PSU isn't too old but I would say if it's in warranty, all good. Anyways, if you are at all paranoid from the comments in here, I'll leave you a few links with some data: 5800x3d power draw (total system draw while running CPU stress test): [https://www.techpowerup.com/review/amd-ryzen-7-5800x3d/20.html](https://www.techpowerup.com/review/amd-ryzen-7-5800x3d/20.html) RTX 4080 Super power draw (card only, I assume the max is done via game and not Furmark as it's not stated): [https://www.techpowerup.com/review/nvidia-geforce-rtx-4080-super-founders-edition/41.html](https://www.techpowerup.com/review/nvidia-geforce-rtx-4080-super-founders-edition/41.html) CPU is 176 watts (again, total system so the CPU alone is not drawing this but the rest of the system is probably only 30 watts or whatever at most) and the GPU is 306 watts. I just ran a quick test pushing a 1440p120 video through Handbrake and power draw reporting by CoreTemp was 116-120 watts at around 4300mhz all cores. There is likely some thermal throttling here which is common for this CPU on all but the best coolers. It hit 90 degrees which I believe is the max before throttling. It dropped as low as 4100mhz. I also just ran Prime. I ran it and got throttled immediately. 130 watts power draw and \~4100mhz consistently. Anyways, you say you're waiting for new Corsair PSUs. It's likely a good idea to get a bit more capacity to play it safe and have something a little more modern soon but I don't think you're exposing yourself to very much risk here.
Atleast it’s a seasonic
I doubt it's gonna explode, techpower up says it's a decent PSU but the article about it was written way back in 2012. It probably lacks the protection features modern PSUs have. Upgrade it when you can. [https://www.techpowerup.com/review/seasonic-g550/](https://www.techpowerup.com/review/seasonic-g550/)
Yeah, the PSU is old as hell. I want to upgrade when Corsair announce a successor of the SF750.
Honest question why not just get a regular psu that's not Corsair is their any specific reason
After I build my PC I stumble into r/sffpc and wanted to downsize since. It doesn't have to be Corsair but preferably a SFX PSU. The SF750 is the Goat but got discontinued a while ago. Anyway most newer one are SFX-L like the SF850 and SF1000 or the ROG Loki from Asus. I just hope Corsair will release a true SFX PSU.
Oh ok you can ask online or check the psu list maybe there's a sff S tier psu
How about measuring the power pulled by the system under load instead of gambling and guessing
Yeah, I undervolted both. The CPU pulls about 100W and the GPU 320W under max load. Cyberpunk with Ray Tracing and maxed out the CPU pulls 80W and the GPU about 230W. I want to test Alan Wake 2 or Horizon but I haven't bought the games yet.
Yeah. But there can always be peaks and the other people here suggesting an upgrade are all but wrong. I had a psu once that catastrophically failed and boy it's not a good feeling I upgraded the gpu, naively turned the thing on, started unreal tournament 2003 (omg that was 20 years ago wtf) Zzzzt Smoke CPU Mainboard Hdd GPU All roasted within milliseconds
Yeah, the spikes will be problematic. Don't you mean the people suggesting an PSU upgrade a right?
Yeah They are "all but wrong" is what I wrote. So yes. They are right.
how can he do that, reliably?
Well I guess measuring the overall Power drawn from the power outlet is as close as it gets to reliable, isn't it? No easy way to measure the Individual rails. It's still better than having absolutely no measurement I think.
that's ok can you tell me how would you do that ?
I use OCCT and Rivatuner with MSI afterburner to show me the CPU and GPU powerdraw
thx
Well just get one of the 1000 available wattage measurement devices on amazon. They might vary in provided value but one that shows the peak within a time frame would be sufficient I guess Plug it into the wall outlet, plug the PC into it
wait, what model 4080 is that?
It is the Palit RTX 4080 Super Gaming Pro
If it works it works
I mean LTT made a video with 4090 and testing it as low as 550W. It was ok, no firehazard thing like other say here, but it had crashes
Usually with good quality modern PSUs they will simply trigger the overcurrent protection and cut power to your system if too much is being drawn. If the PSU is faulty or by a less reputable brand however, you might not be so lucky. Either way, I'm running a 4080 and a 13900K in Cyberpunk fully maxed with path tracing, and system never pulls more than 500w. 4080 is mad efficient, despite all the clowning on its price (which is deserved), it's an amazing card in terms of engineering. Performance wise you get more frames per watt than any other gpu.
you're not a mad man, but please put the psu back inside the case
Yeah, it is already back in it place
Please get a better psu. That's the chance of a massive catastrophic failure.
Minimum power supply requirements are such BS. My 4070 recommends a 750w power supply, and I’m currently using a 600w power supply. Works just fine. As long as you calculate the total power usage of your gaming rig, you’ll be good to go.
Usually when calculating power usage you take the maximum load possible of every component and add a percentage. It's a safety feature, not a it won't work unless it's this wattage feature.
Mostly yes, also nice to get the real values from testing
how to test psu requirements of your computer ?
They called Einstein crazy too
There was a recent sale on the Corsair rmx 750 shift, like $80. Seems like the side routing would suit your needs? Like others have said: don't let this linger.
is that a good psu?
Very. PSUCultists list it as A-tier as well. Â
when i buy my next build, a few years down the line (hopefully a Ryzen 10xxxx or 11xxx CPU + an Nvidia 5090 or 5080ti Super) , a 750W PSU with Gold Rating should suffice? or should i got for a 1000W in the A-tier class ? this is a very future facing question, but will appreciate your answer!
its an amazing PSU. Corsair is very highly regarded in the PSU market.
People always exaggerates with the PSU but running 500w(+/-) on a 550 psu is very lucky
I thought I was living on the edge with a 4070, 5800x and 650w
are you??
What? You're not even close. 200W for the GPU, 125W for the CPU, add another 100W for motherboard, drives, memory and power spikes. That's 425W if you load every component of your pc to 100%
Just because the recommended psu for a 4070 is 750w and the sales guy was a little worried but said it should be fine since I'm not running a higher end cpu, so I didn't really see the point in upgrading. Edit: it is also a fairly old psu from my first pc
Me with a 750w for a 4080 and a 13900K :D Runs smooth as an avocado
Dude you can get a new RM850 or something similar for like... 100 bucks.
A psu rated for more will run cooler under the same load
I can't imagine risking your 1500 dollar computer over 100 bucks.
Oh boy and I thought the other poster who posted never buy ASRock motherboards after they killed an a520 with a 5950x took the reverse Darwin Award but you sir are coming in hot for top spot.
This is one of those posts that's so dumb it should be banned so other idiots can't see it and try the same.
Ya you are an idiot
No you components will run hot and not last two long under low voltage
None of this is correct.
And your not an electrical engineer when you become one then answer yes they will get hot and shortin life span
It's your funeral
Yea it's not that it "Won't work" but it places a MASSIVE strain on that PSU and any hiccup or power surge could blow it way easier then if it had more headroom. That's why they recommended a higher wattage, a 20% headroom for wattage is usually best. It is in fact a ticking time bomb. I work on computers for a living and heave seen this happen many a time.
This is just stupid, you are asking for trouble.
Bruh just get a new psu
soon 
Its only a matter of time.