Question Can I connect a RTX4080 to a Corsair HX850i?

[S3Z]

Hi, I asked almost a similar question like 15 years ago or something. Well, history repeats itself.

I have a pc which is almost all from 2022Q4, except PSU and the GPU.

When I last year built this pc I used my PSU from my pc from 2018 or so, it is a Corsair HX850i , this one:

https://www.corsair.com/us/en/p/psu/cp-9020073-na/hxi-series-hx850i-high-performance-atx-power-supply-850-watt-80-plus-platinum-certified-psu-cp-9020073-na

And the GPU, which is a 1050ti from Gigabyte. This GPU was until 2022 quiet good enough, but now the newest games are unplayable, most not even at the lowest settings.

Now I have a one time bonus from my job, I decided to buy a new GPU. I think the 4090 is way too power-hungry for my PSU. Also my monitor is 1440p, upgrading the monitor to 4k is not an option, because I have a photography oriented monitor which was a few thousand bucks. So it has very very good colors, contrast etc. And for my photography it's perfect. So a 4090 would perhaps be overkill for 1440p anyway.

But would a 4080 with this PSU be ok? I'm asking because my PSU is 4-5 years old already and I'm not sure something changed drastically. I remember way way ago that I had a PSU unit, which had enough amount of wattage, but had one ray too little or something. So I thought it would be ok, but blew up my PSU anyway.

So if I could get an average 4080, would this PSU be ok for now? I was thinking of this one, but any 4080 would be fine:

Amazon.de

Any suggestions or tips or even warnings? And thanks in advance for reading and putting time in an answer!

 

[bdcrlsn]

I'm pretty sure it'll be fine, you just need to watch that new 12VHPWR power connector that the 4000 series comes with. The GPU should come with an adapter, if not, they're easy to find online. Just make sure everything is fully connected properly because there's been too many reports of melting connectors due to not being fully seated.

 

[XxDarkMario20xX]

4080 is an good gpu and if you risked it before and PSU blew up then would suggest getting 3.0 PSU because that will connect to 4080 without any adaptors and anything to worry about. But This is upto you because got good PSU and 4080 will come with adaptor to connect to 4080 with

 

[stefanos50]

Hi, I asked almost a similar question like 15 years ago or something. Well, history repeats itself.

I have a pc which is almost all from 2022Q4, except PSU and the GPU.

When I last year built this pc I used my PSU from my pc from 2018 or so, it is a Corsair HX850i , this one:

https://www.corsair.com/us/en/p/psu/cp-9020073-na/hxi-series-hx850i-high-performance-atx-power-supply-850-watt-80-plus-platinum-certified-psu-cp-9020073-na

And the GPU, which is a 1050ti from Gigabyte. This GPU was until 2022 quiet good enough, but now the newest games are unplayable, most not even at the lowest settings.

Now I have a one time bonus from my job, I decided to buy a new GPU. I think the 4090 is way too power-hungry for my PSU. Also my monitor is 1440p, upgrading the monitor to 4k is not an option, because I have a photography oriented monitor which was a few thousand bucks. So it has very very good colors, contrast etc. And for my photography it's perfect. So a 4090 would perhaps be overkill for 1440p anyway.

But would a 4080 with this PSU be ok? I'm asking because my PSU is 4-5 years old already and I'm not sure something changed drastically. I remember way way ago that I had a PSU unit, which had enough amount of wattage, but had one ray too little or something. So I thought it would be ok, but blew up my PSU anyway.

So if I could get an average 4080, would this PSU be ok for now? I was thinking of this one, but any 4080 would be fine:

Amazon.de

Any suggestions or tips or even warnings? And thanks in advance for reading and putting time in an answer!

I am running an RTX 4090 and I7 13700K with a Corsair HX850 Platinum and did not have any problem even if both CPU/GPU were stressed (850W its the recommended minimum PSU from NVIDIA). I am also running a 1440p and indeed this GPU is a waste if you also don't need it for any professional workload. So an RTX 4080 should be good with your PSU. You also did not mention the CPU that will be paired because the CPU draw also matters (maybe you have a less power consuming Ryzen CPU than an Intel I9). With a quick search your PSU uses type-3 connectors rather type-4 so you will probably have to stay with the included adapter (with type-4 you could buy a cable from corsair that connects directly to the PSU). If you start having problems like random restarts maybe from spikes then you will have to replace your PSU immediately.

 

[stefanos50]

I never understood the whole mentality that if you don't have a 4K monitor it's a waste.

I used my 4090 for a few weeks on a 1440 monitor and it looked great and performed great.
Got internet pressured into a 4K monitor and yes, it absolutely looks beautiful but I did lose a sizeable amount of frames.

There's a trade off. Depending on current pricing, which I have not looked at, unless the 4080 is massively cheaper, you're already putting a fairly substantial amount of money towards a card, then put the extra towards a 4090.

Games are just getting more and more VRAM hungry and are pisspoor optimized these days.

Is it overkill for strictly photography, yes. For gaming and photography? No.

Ultimately go with what you feel comfortable with. The 4080 is a food card and so is the 4090. I just get tired of these 4090s are dumb on a 1440 monitor comments.


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As for your PSU, you will be fine. A 4080 with say 13700k will need around 700, 750 is you're paranoid.

A 4090 with again said 13700 with a even a mild overclock 800w or 850w for the paranoid.

I'm very paranoid (and it was the only one available when I was looking for one is 1000w).

Of course, you can buy an RTX 4090 for 1080p and keep the GPU with a good performance at this resolution for the next maybe 6-8 years at some point there will be a noticeable difference with the 4080. But at this point, newer cards with newer features/techonologies will be out. It makes more sense to buy an RTX 4080 and keep the 500-600 euros difference for a next-generation GPU with newer techonologies (that it also may perform much better than the 4090) when the performance in 3 years won't be enough. Thats what i did with the 2000 series got the 2080 than the TI version and with the price difference + selling the card after two years got the 3080 that had huge difference in Ray Tracing and more VRAM.

 

[S3Z]

I never understood the whole mentality that if you don't have a 4K monitor it's a waste.

What you call "the whole mentality" is also called "being reasonable" by some.

I know in this world with so many desirable items it might seem fine to let go all the facts and let your emotions carry you away. But trust me, the mentality which I call "being reasonable" is the best course of action. Especially with a business like nvidia, I can't stress more than enough to check facts first, then still don't trust them. In short: A 4090 is overkill with my setup for many reasons.

Also, in the meantime some new facts have come up. When I started this topic I hadn't read about the new amd option RX7800XT. It it s a card meant for 1440p and starts from 500€. So I'm guessing I'm waiting a bit more. It seems like the dreamcard for me now that I read about it. If facts prove otherwise, perhaps the price of the rtx4080 will come down a bit because of the new cards from AMD. Thanks everyone for your input and time, I will wait one more month before making a purchase! 😀

 

[XxDarkMario20xX]

I don’t upgrade

Not upgrading based on your monitor isn't reasonable either. Devils advocate, If the OP thought they wanted a 4090, having a 1440 monitor shouldn't be a reason not to get one.
Firstly you get what you can afford and if its compatible and won't bottleneck.
Second, while the OP loves their monitor now, it would leave an open door to 4K in the future should s 4K monitor be purchased.

So from a new perspective, sure, "it's being reasonable". From a forward and circumstantial perspective "it's being irrational".

Again, it all depends where you live and the prices at the time. I was going by when I bought mine and where I live. With competition having ramped up, I'm not surprised the that the 4080 is that much cheaper now.

Yeah he could get a cheaper gpu and then changed his mind later in year that he wants to play 4k. I don’t upgrade based on what monitor got if it’s an overkill then it’s overkill but you can always have a choice on future monitor and save up. Upgrading can take steps