Is buying a 5090 only for gaming really that bad?

Hey guys,

I’m currently wondering whether upgrading to an RTX 5090 would actually make sense for my setup. I built my first real gaming PC back in April with a 5070 Ti for 4K gaming. I didn’t go for the 5080 at the time because in Germany the price difference compared to the 5070 Ti just wasn’t worth it.

About a month later, I got a PG32UCDM on an open-box deal. In Cyberpunk 2077 I was able to play in 4K with DLSS Performance + MFG x4, max settings (path tracing off) at around 160 FPS. Some games, though, struggled to maintain higher frame rates. So over the last few months, the idea of getting a 5090 came up, mainly to take full advantage of my monitor.

Before this PC, I played almost exclusively on PlayStation consoles. But now I have a stable job and got lucky in the stock market, so I decided to build an expensive PC for my biggest hobby. That’s why, even though a 2100 EUR GPU is very expensive, I can afford it without hurting my finances. The only thing holding me back is whether the performance uplift is actually worth it. Is the 5090 really that good at 4K? I play pretty much all types of games, including most big releases.

On top of that, I don’t want to replace any of my current components. If the 5090 is an option for me, I want it to fit into my existing system without essentially building a new PC.

My current specs:

• CPU: AMD Ryzen 7 9800X3D

• GPU: Palit GamingPro 5070 Ti

• Motherboard: MSI Tomahawk B850

• PSU: Corsair RM1000x 3.1 (ATX 3.1)

• CPU Cooler: Thermalright Frozen Warframe AIO 360 mm

• RAM: 64 GB Patriot Viper DDR5 6000 MHz CL30

• Storage: WD Black S850N

• Case: NZXT H6 Flow

• Monitor: ASUS ROG PG32UCDM

TL;DR:
Built my first high-end PC this year with a 5070 Ti for 4K gaming, then bought a PG32UCDM. Performance is good, but some games struggle to fully utilize the monitor. I can afford a 5090, but I’m unsure if the 4K performance uplift is worth it. Also don’t want to change any components — just swap GPUs. Looking for advice on whether a 5090 makes sense for my setup.