GeForce RTX 3090 vs Radeon RX 6400
On raw speed the GeForce RTX 3090 comes out dramatically faster — about 550% ahead of the Radeon RX 6400. It also wins on performance-per-dollar, making it the cleaner choice when you can afford it.
Market Value Leader
GeForce RTX 3090 is the clear winner, offering 76.6% better value than Radeon RX 6400.
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GeForce RTX 3090 vs Radeon RX 6400: In-Depth Breakdown
Performance: GeForce RTX 3090 vs Radeon RX 6400
The GeForce RTX 3090 is dramatically faster, around 550% ahead of the Radeon RX 6400. That gap is enough to move it up a tier: the GeForce RTX 3090 is comfortable at 1440p, while the Radeon RX 6400 is better matched to entry-level 1080p.
Price & Value
The Radeon RX 6400 currently lists from $4,222 SEK, $11,319 SEK less than the GeForce RTX 3090 at $15,542 SEK. Because it's both faster and competitively priced, the GeForce RTX 3090 wins on performance-per-dollar by about 77%. The Radeon RX 6400 still sits about $4,063 SEK above its $159 SEK MSRP. The GeForce RTX 3090 still sits about $14,043 SEK above its $1,499 SEK MSRP.
Power & Efficiency
At 53W against 350W, the Radeon RX 6400 is both the lower-power and the more efficient card, making it the easier build to cool and power. Its more modern RDNA 2 architecture on a TSMC N6 process is part of why it does more with each watt.
VRAM & Future-Proofing
The GeForce RTX 3090 carries 24GB versus 4GB on the Radeon RX 6400. The extra 20GB helps at 4K, with high-resolution texture packs, and for content-creation or local-AI workloads that exhaust smaller buffers.
Generation & Longevity
The Radeon RX 6400 is roughly 2 years newer than the GeForce RTX 3090 (RDNA 2 vs Ampere), so it generally benefits from a more modern architecture and longer driver-support runway.
Features & Ecosystem
Beyond raw numbers, the GeForce RTX 3090 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 3090 or Radeon RX 6400?
The GeForce RTX 3090 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 3090 better than the Radeon RX 6400?
Which is better for 4K gaming, the GeForce RTX 3090 or the Radeon RX 6400?
Is the GeForce RTX 3090 worth the extra $11,319 SEK over the Radeon RX 6400?
Does the GeForce RTX 3090 have enough VRAM advantage to matter?
Which should you buy: GeForce RTX 3090 or Radeon RX 6400?
Technical Specifications Comparison
Architecture & Cores
| Specification | GeForce RTX 3090 | Radeon RX 6400 |
|---|---|---|
| Architecture | Ampere | RDNA 2 |
| Process Node | Samsung 8nm | TSMC N6 |
| CUDA Cores (CUDA Cores / Stream Processors) | 10,496✓ | 768 |
| Ray Tracing Cores | 82✓ | 12 |
| Tensor / AI Cores | 328 | — |
Clock Speeds
| Specification | GeForce RTX 3090 | Radeon RX 6400 |
|---|---|---|
| Base Clock | 1,395 MHz | 1,923 MHz✓ |
| Boost Clock | 1,695 MHz | 2,321 MHz✓ |
Memory
| Specification | GeForce RTX 3090 | Radeon RX 6400 |
|---|---|---|
| VRAM Capacity | 24 GB✓ | 4 GB |
| Memory Type | GDDR6X | GDDR6 |
| Memory Bus | 384-bit✓ | 64-bit |
| Memory Speed | 19.5 Gbps✓ | 16 Gbps |
| Bandwidth | 936 GB/s✓ | 128 GB/s |
Connectivity & Power
| Specification | GeForce RTX 3090 | Radeon RX 6400 |
|---|---|---|
| Interface | PCIe 4.0 x16 | PCIe 4.0 x4 |
| TDP | 350 W | 53 W✓ |
| Power Connectors | 1x 12-pin | None |
| Released | Sep 2020 | Jan 2022 |
