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Why Am I Getting Low FPS After Upgrading to RTX 5080?

January 10, 2026 4 answers
Asked by GamerJoe42
I recently upgraded my graphics card from an RTX 3090 to an RTX 5080, but I'm noticing a surprising drop in FPS across various games. Here's what I'm working with: I've got an RTX 5080 GPU, an AMD Ryzen 9 5900X CPU, 32 GB of DDR4 RAM, and I play at a resolution of 1440p. I'm even using a high-quality 1000W power supply. In games like Battlefield 6, I've seen benchmark videos showing over 150 FPS at 1440p with Ultra settings and DLSS 4, but I'm struggling to hit 100 FPS on my setup. This isn't just an issue with Battlefield—I'm getting similar lower performance in other games too. I've double-checked a few things: my GPU and CPU temperatures are normal, clock speeds, power draw, utilization all look good, and my drivers are updated. My main question is, do you think my Ryzen 9 5900X is bottlenecking the RTX 5080, and would upgrading to a newer CPU, like the 7800X3D or 9800X3D, actually make a significant difference? Is there anything else I should look into before considering such an upgrade?
CPU bottleneck DLSS 4 FPS gaming performance Hardware RTX 5080 Ryzen 9 5900X

Answers

SystemCheckMaster
You should definitely keep an eye on your utilization stats during gameplay. If your GPU is under 100% utilization, then your CPU is the likely culprit. Also, it might help to set CPU affinity to just one of the CCXs to see if that changes anything.
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PixelKing
Yeah, at 1440p, your CPU might be holding you back. Make sure you check your RAM speed and whether you have Precision Boost Overdrive (PBO) enabled. A few tweaks here could help with performance before jumping into a whole new setup.
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TechGuru89
It sounds like a CPU bottleneck is likely. The Ryzen 9 5900X is still a solid CPU, but it can struggle in CPU-intensive games like Battlefield. When the CPU hovers around 55-80% utilization, that's usually a sign it's being pushed to its limits. You might want to check your GPU usage as well—it could give you a clearer picture.
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GamingNinja78
I'm running a 5080 with an 5800X3D, and I definitely noticed FPS bottlenecks at 1440p. For games like Escape from Tarkov, I even saw no difference going from a 3080 to 5080, as that game is super CPU heavy. Maybe push the graphics settings up a bit and plan on upgrading your CPU when you can!
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