BenchPair

Radeon RX 6400 bottleneck & FPS

Ranked 111 of 126 desktop graphics cards in our database (12th percentile). Paired with a Core i3-8100F it lands near 14 fps at 1080p and 3 fps at 4K in a typical AAA title at high settings.

SpecificationsRDNA 2 · 2022
ArchitectureRDNA 2
Shading units768
Boost clock2,321 MHz
Memory4 GB
Memory bandwidth128 GB/s
Board power53 W
Released2022
Frame rate by resolutionwith Core i3-8100F, high
ResolutionEst. FPSGPU loadLimited by
1920 x 1080 14 99% Graphics card
2560 x 1440 8 99% Graphics card
3440 x 1440 6 99% Graphics card
3840 x 2160 3 99% Graphics card
Best CPU for the Radeon RX 64001080p, high

Ranked by how little performance the pairing wastes, not by which processor is fastest. The fastest chip pairs well with everything, which makes it a useless recommendation.

ProcessorEst. FPSUnused
Core i3-8100F 14 73.9%
Core i3-8100 14 73.9%
Core i3-8300 14 74.6%
Core i3-8350K 14 76.5%
Core i3-9100 14 77.6%
Core i3-9100F 14 77.6%
Estimated FPS by game1440p, high, Core i3-8100F
GameEst. FPSVRAM
Cyberpunk 2077 4 9.8 GB needed
Fortnite 13 5.8 GB needed
Counter-Strike 2 44 OK
Baldur's Gate 3 8 6.9 GB needed
Red Dead Redemption 2 5 8.1 GB needed
Microsoft Flight Simulator 2024 5 9.2 GB needed
Against its closest neighbours1080p, high
PartEst. FPSDifference
Radeon RX 570 4GB 14 fps 0%
Radeon RX 570 8GB 19 fps +36%
Radeon RX 6400 14 fps this part
Radeon RX 470D 12 fps -14%
Radeon RX 6300 9 fps -36%

Every row measured against the same processor, so the difference shown comes from the parts themselves rather than from unrelated systems.

What CPU should I pair with a Radeon RX 6400?

At 1080p the best match from our database is the Core i3-8100F, which leaves only 73.9% of the combined potential unused and lands around 14 fps in a typical AAA title. The table above lists five more, ranked by how little each pairing wastes rather than by raw speed.

Bear in mind that the right processor depends on the resolution you play at. At 1440p and 4K the card does proportionally more of the work, so a cheaper chip than the one listed will keep up — the pairing only gets tighter as resolution falls. At 4K this card is 99% utilised, so almost any modern processor is sufficient.

What to expect from a Radeon RX 6400

This card sits in the lower part of the range we model. It will run modern titles at 1080p with settings turned down, and it will be the limiting component in almost any pairing — which means there is no sense pairing it with an expensive processor.

If frame rates are disappointing, the card is where an upgrade will help. Nothing else in the system is holding it back.

4 GB is this card's real limit

11 of the 16 titles we model exceed 4 GB at 1440p and high settings. On this card memory, not shader throughput, is the thing that will make modern games stutter. Texture quality is the setting to lower first, and it usually costs less visual fidelity than the alternatives.

Is 4 GB of VRAM enough for the Radeon RX 6400?

Not everywhere. At 1440p on the high preset, 4 GB falls short in 11 of the 16 titles we model. Running out of video memory causes frame time spikes rather than a smooth drop in the average, so it feels worse than the numbers suggest.

What bottlenecks a Radeon RX 6400?

At 1080p this card is normally the limiting component itself. At 4K it is 99% utilised, meaning nearly all the work sits on the card and the processor barely matters.

Where it sits

Ranked 111 of 126 desktop cards we model. Nearest faster: Radeon RX 570 4GB , Radeon RX 570 8GB . Just below: Radeon RX 470D , Radeon RX 6300 . Full method on the methodology page.