Do the Ryzen 9 3950X and Radeon RX 7900 XT bottleneck each other?

Yes. At 1080p (1920 x 1080) the Ryzen 9 3950X is the limit and holds the Radeon RX 7900 XT back by about 14.7%, for roughly 108 fps on High. Low. At 108 fps the imbalance costs you headroom rather than playability.

How many fps do the Ryzen 9 3950X and Radeon RX 7900 XT get at 1080p (1920 x 1080)?

Around 108 fps on the High preset. The Ryzen 9 3950X tops out near 113 fps and the Radeon RX 7900 XT near 133 fps, and the lower of the two sets the frame rate.

Ryzen 9 3950X + Radeon RX 7900 XT Bottleneck Calculator

Whether the Ryzen 9 3950X and the Radeon RX 7900 XT hold each other back, at every resolution, with the frame rate you can expect and the single upgrade that fixes it.

Processor

Graphics card

Screen resolution

Graphics preset

Memory (RAM)

Primary usage

Estimates built from published benchmark data, not a test of your exact PC. How we calculate this.

The same pair at every resolution

A processor pushes roughly the same number of frames whatever the resolution. A graphics card pushes far fewer as pixels go up. That is why the limit moves as you climb this table, and why a bottleneck figure quoted without a resolution means nothing.

Resolution	Estimated fps	Limited by	Gap
720p (1280 x 720)	109 fps	CPU	37.7%
1080p (1920 x 1080)	108 fps	CPU	14.7%
1440p (2560 x 1440)	93 fps	Balanced	3.7%
Ultrawide 1440p (3440 x 1440)	77 fps	Balanced	0%
4K (3840 x 2160)	54 fps	Balanced	1.2%
8K (7680 x 4320)	24 fps	GPU	56.8%

What to do about it

The Ryzen 7 7800X3D is the slowest CPU in our database that stops the Radeon RX 7900 XT from idling at 1080p (1920 x 1080). A faster chip than that adds nothing at this resolution, so this is the step to buy, not the top of the stack.

See what the Ryzen 7 7800X3D pairs with

Modelled from published benchmark data, not measured on this exact combination. The indexes behind these figures and the sources they come from are on how we calculate this.