GeForce RTX 4090 vs Radeon RX 6800
Performance-wise the GeForce RTX 4090 is out front, dramatically faster, roughly 132% up on the Radeon RX 6800. It is also the stronger value pick here, so it's the easy recommendation if your budget allows.
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GeForce RTX 4090 vs Radeon RX 6800: In-Depth Breakdown
Performance: GeForce RTX 4090 vs Radeon RX 6800
The GeForce RTX 4090 is dramatically faster, around 132% ahead of the Radeon RX 6800. 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 6800 is better matched to 1440p.
Price & Value
Right now the GeForce RTX 4090 starts at $95 BRL against $4,559 BRL for the Radeon RX 6800. Because it's both faster and competitively priced, the GeForce RTX 4090 wins on performance-per-dollar by about 11099%. The GeForce RTX 4090 is trading below its $1,599 BRL MSRP — a genuine deal. The Radeon RX 6800 still sits about $3,980 BRL above its $579 BRL MSRP.
Power & Efficiency
The Radeon RX 6800 is the lighter draw at 250W against the GeForce RTX 4090's 450W, making it the easier card to power and cool. The GeForce RTX 4090 draws more in absolute terms but squeezes out more performance per watt, so budget for a beefier PSU if you go that route. Its more modern Ada Lovelace architecture on a TSMC 4N process is part of why it does more with each watt.
VRAM & Future-Proofing
The GeForce RTX 4090's 24GB (vs 16GB on the Radeon RX 6800) gives it more room for 4K textures and memory-hungry creative or AI workloads.
Generation & Longevity
The GeForce RTX 4090 is roughly 2 years newer than the Radeon RX 6800 (Ada Lovelace vs RDNA 2), so it generally benefits from a more modern architecture and longer driver-support runway.
Features & Ecosystem
Beyond raw numbers, the GeForce RTX 4090 brings NVIDIA DLSS upscaling/frame generation and stronger ray tracing, while the Radeon RX 6800 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 6800?
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 6800 if you find it at a steep discount.
Frequently Asked Questions
Is the GeForce RTX 4090 better than the Radeon RX 6800?
Which is better for 4K gaming, the GeForce RTX 4090 or the Radeon RX 6800?
Is the Radeon RX 6800 worth the extra $4,464 BRL over the GeForce RTX 4090?
Does the GeForce RTX 4090 have enough VRAM advantage to matter?
Which should you buy: GeForce RTX 4090 or Radeon RX 6800?
Technical Specifications Comparison
Architecture & Cores
| Specification | GeForce RTX 4090 | Radeon RX 6800 |
|---|---|---|
| Architecture | Ada Lovelace | RDNA 2 |
| Process Node | TSMC 4N | TSMC N7 |
| CUDA Cores (CUDA Cores / Stream Processors) | 16,384✓ | 3,840 |
| Ray Tracing Cores | 128✓ | 60 |
| Tensor / AI Cores | 512 | — |
Clock Speeds
| Specification | GeForce RTX 4090 | Radeon RX 6800 |
|---|---|---|
| Base Clock | 2,235 MHz✓ | 1,700 MHz |
| Boost Clock | 2,520 MHz✓ | 2,105 MHz |
Memory
| Specification | GeForce RTX 4090 | Radeon RX 6800 |
|---|---|---|
| VRAM Capacity | 24 GB✓ | 16 GB |
| Memory Type | GDDR6X | GDDR6 |
| Memory Bus | 384-bit✓ | 256-bit |
| Memory Speed | 21 Gbps✓ | 16 Gbps |
| Bandwidth | 1,008 GB/s✓ | 512 GB/s |
Connectivity & Power
| Specification | GeForce RTX 4090 | Radeon RX 6800 |
|---|---|---|
| Interface | PCIe 4.0 x16 | PCIe 4.0 x16 |
| TDP | 450 W | 250 W✓ |
| Power Connectors | 1x 16-pin | 2x 8-pin |
| Released | Sep 2022 | Nov 2020 |
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