Question Will my gaming rig bottleneck a 4090?


Jul 24, 2012
I'm thinking of upgrading to an RTX 4090 but I'm weary that my build, which isn't too old, will bottleneck the videocard

This is my gaming rig, built 2 years ago. I want to just swap the videocard with a 4090

I have an 850 watt PSU. no extra fans, no water cooling, only 2 SSDs

Hopefully I got it right. I'm just waiting on rest of the parts now, some I already have received

Monitor LG 27gl850 27" gaming monitor paid around $550


AMD Ryzen 7 3700X CPU paid around $300


RAM G.Skill RipJaws V Series 16GB (2 x 8GB) 288-Pin SDRAM
PC4-28800 DDR4 3600 paid around $80


Hard Drive Samsung SSD 860 EVO 4TB 2.5 Inch SATA III Internal SSD paid around $700

Motherbaord MSI MPG X570 GAMING PLUS Gaming Motherboard AMD AM4
SATA 6Gb/s M.2 USB 3.2 Gen 2 HDMI ATX paid around $180


Power Supply EVGA SuperNOVA 750 G3, 220-G3-0750-X1, 80+ GOLD, 750W paid around $170


Videocard EVGA RTX 2070 Super paid aruond $600


case Lian Li Lancool II mid tower ATX case paid around $150




850 Watt PSU is not saying anything without the model number. You can build and sell a 850 watt PSU that will pop if you pull 500 watts from it that is very poorly regulated pretty much call it anything you wish even if you know it's not true

In general for 1440p a RTX 3080/3080ti is plenty at a much lower price.
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Huh? No. Your pc isn't going to bottleneck a 4090. What it is going to do is severely underutilize it. A 4090 is purely a 4k card, absolutely no reason to ever use it on a lesser resolution. Even some of the hardest hitting games like Cyberpunk 2077 maxed ultra with Raytracing at 1440p/144Hz won't tax that card. And G forbid you play CSGO, that card will be asleep before the loading screen is done.

Cpu is FPS. Gpu is Eye-Candy. The only reason to upscale a gpu is if you cannot get the desired Eye-Candy level at the demanded FPS. At 1440p/144Hz desired level of Eye-Candy doesn't exist. It's somewhere up beyond that level with a 4090.

Your pc isn't the bottleneck, the monitor is. It simply won't challenge a 4090 except in very specific circumstances, like FarCry with HD texture pack. A 3080/Ti would be a far better value as it at least would be challenged more and wasted less.
yea I have a feeling the 4080 will be harder to obtain than the 4090

We are only a week away after the launch of the RTX 4090, so availability is sorta hard to analize, and even harder for a product like the RTX 4080 16GB which is not yet launched to the market, most likely it will also get unavailable after a day or two depending on the day one stock. And this happend with every single GPU launch before the pandemic and the mining boom.
Usually GPU stock stabilize after a month or month in a half, depending on where you are in the world. Where I live there was not even 1 single RTX 4090 available, and its still the case.

Right now with nvidia still having lots of high end RTX 3000 models in stock (at least according to external sources), at prices that are not really awesome for the consumer considering we are talking about a two year old product, its really hard to know what will nvidia do next.

They may also we waiting to see where RDNA 3 stack in the performance charts. Leaks tend to show (lately) that it may be able to fight in rasterisation vs the RTX 4090 without much effort, but it will lose in Ray Tracing (for those who care about it).

And I do agree with others here, either go with an "old" RTX 3080 12 GB, or wait till next year when we have the whole product stack from both Nvidia and AMD to pick the right one for your needs.


I'm weary of just getting a 3080 because the performance jump to a 4090 rtx is so massive

That you will never see with your current CPU, and monitor setup. 1440p, the RTX 4090 can be held back by the fastest gaming chips, currently. It really is a 4k card. Granted it would last a long time, at 1440p, before it needed replaced, if that sort of thing matters to you.