Grandpa's Legacy on Radeon RX 6400

Well above recommendedEstimate · low confidence, ±30%

Yes. The Radeon RX 6400 is well above Grandpa's Legacy's recommended spec. We estimate ~126 fps at 1080p high (range 88–164, low confidence, ±30%), GPU-limited. At 1440p high expect ~88 fps, so every preset holds 60 fps. Its 4 GB of video memory covers the 1 GB the game requires at minimum. Model estimate, not measured; data updated 2026-09-24.

Estimated FPS by preset

Preset	1080p	1440p	4K
low	215	150	90
medium	164	115	69
high	126	88	53
ultra	101	71	42

Estimate · low confidence, ±30%

Estimated FPS from our model (v0), based on the game's published requirements and relative GPU/CPU performance. Not measured. Real results vary with drivers, patches, and scenes. Values above 300 fps show as 300+. Data updated 2026-09-24.

Best settings

60 fps at 1080p: ultra preset
60 fps at 1440p: ultra preset
144 fps at 1080p: medium preset

AMD card: use FSR in quality mode before dropping the preset (XeSS also works). DLSS is not available on Radeon.

What limits performance

Estimates above: GPU-limited, assuming a processor fast enough not to hold the Radeon RX 6400 back.
Processor needed for ~126 fps: Core i3-9100F or faster (slowest current desktop CPU our model expects to keep up).

Video memory

Radeon RX 6400: 4 GB
Minimum spec: 1 GB (+3 GB headroom)

Cheapest upgrade for each target

4K, 60 fps, High

Radeon RX 6500 XT

~61 fps vs 53 now (est.)

+15% GPU performance

Slowest current desktop card (2020+) that reaches each target in Grandpa's Legacy; usually the cheapest.

Grandpa's Legacy on popular graphics cards (high preset)

Graphics card	1080p	1440p	vs Radeon RX 6400
GeForce GTX 1650	126	88	0%
Radeon RX 6400	126	88	—
GeForce GTX 1060 6GB	177	124	+40%
GeForce RTX 2060 6GB	265	186	+110%
Radeon RX 6600	291	203	+130%
GeForce RTX 3060 12GB	300+	221	+150%
GeForce RTX 4060 Laptop GPU	300+	230	+160%
Radeon RX 7600	300+	256	+190%
GeForce RTX 4060	300+	261	+195%
GeForce RTX 3070	300+	300+	+245%
GeForce RTX 4070	300+	300+	+335%
Radeon RX 7800 XT	300+	300+	+385%
GeForce RTX 5070	300+	300+	+400%
Radeon RX 9070 XT	300+	300+	+550%
GeForce RTX 4080	300+	300+	+575%
GeForce RTX 5090	300+	300+	+975%