GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
Market Value Leader
Market comparison is currently pending while we verify the latest benchmarks for GeForce RTX 4090 and Radeon RX 6400.
The GeForce RTX 4090 is dramatically faster than the Radeon RX 6400, leading by roughly 1100% in our performance index. It is also the stronger value pick here, so it's the easy recommendation if your budget allows.
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Comparable or lower specs
GeForce RTX 4090 vs Radeon RX 6400: In-Depth Breakdown
Performance: GeForce RTX 4090 vs Radeon RX 6400
The GeForce RTX 4090 is dramatically faster, around 1100% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the GeForce RTX 4090 is comfortable at 4K and high-refresh 1440p, while the Radeon RX 6400 is better matched to entry-level 1080p.
Price & Value
Right now the Radeon RX 6400 starts at $89,472 JPY against $764,286 JPY for the GeForce RTX 4090. Because it's both faster and competitively priced, the GeForce RTX 4090 wins on performance-per-dollar by about 40%. The Radeon RX 6400 still sits about $89,313 JPY above its $159 JPY MSRP. The GeForce RTX 4090 still sits about $762,687 JPY above its $1,599 JPY MSRP.
Power & Efficiency
The Radeon RX 6400 pulls less power (53W vs 450W), so it's the easier card to cool and the lighter load on your PSU. The faster GeForce RTX 4090 draws more overall but extracts more performance from each watt — plan for a sturdier power supply if you pick it.
VRAM & Future-Proofing
With 24GB against 4GB, the GeForce RTX 4090 has more headroom for 4K textures and memory-hungry creative/AI tasks where the Radeon RX 6400's 4GB can fall short.
Features & Ecosystem
Beyond raw numbers, the GeForce RTX 4090 brings NVIDIA DLSS upscaling/frame generation and stronger ray tracing, while the Radeon RX 6400 offers AMD FSR upscaling and strong rasterization value. If you lean on upscaling or ray tracing, that ecosystem difference can matter as much as the frame-rate gap.
Which should you buy: GeForce RTX 4090 or Radeon RX 6400?
The GeForce RTX 4090 is the all-round winner here — it's faster and the better value, so buy it if it fits your budget. Only consider the Radeon RX 6400 if you find it at a steep discount.
Frequently Asked Questions
Is the GeForce RTX 4090 better than the Radeon RX 6400?
Which is better for 4K gaming, the GeForce RTX 4090 or the Radeon RX 6400?
Is the GeForce RTX 4090 worth the extra $674,814 JPY over the Radeon RX 6400?
Does the GeForce RTX 4090 have enough VRAM advantage to matter?
Technical Specifications Comparison
Architecture & Cores
| Specification | GeForce RTX 4090 | Radeon RX 6400 |
|---|---|---|
| Architecture | Ada Lovelace | RDNA 2 |
| Process Node | TSMC 4N | TSMC N6 |
| CUDA Cores (CUDA Cores / Stream Processors) | 16,384✓ | 768 |
| Ray Tracing Cores | 128✓ | 12 |
| Tensor / AI Cores | 512 | — |
Clock Speeds
| Specification | GeForce RTX 4090 | Radeon RX 6400 |
|---|---|---|
| Base Clock | 2,235 MHz✓ | 1,923 MHz |
| Boost Clock | 2,520 MHz✓ | 2,321 MHz |
Memory
| Specification | GeForce RTX 4090 | Radeon RX 6400 |
|---|---|---|
| VRAM Capacity | 24 GB✓ | 4 GB |
| Memory Type | GDDR6X | GDDR6 |
| Memory Bus | 384-bit✓ | 64-bit |
| Memory Speed | 21 Gbps✓ | 16 Gbps |
| Bandwidth | 1,008 GB/s✓ | 128 GB/s |
Connectivity & Power
| Specification | GeForce RTX 4090 | Radeon RX 6400 |
|---|---|---|
| Interface | PCIe 4.0 x16 | PCIe 4.0 x4 |
| TDP | 450 W | 53 W✓ |
| Power Connectors | 1x 16-pin | None |
| Released | Sep 2022 | Jan 2022 |