GPU Comparison
Select up to 2 GPUs to analyze their pricing, performance, and specifications side-by-side.
Market Value Leader
Radeon RX 6600 XT is the clear winner, offering 45.0% better value than GeForce RTX 4090.
On raw speed the GeForce RTX 4090 comes out dramatically faster — about 300% ahead of the Radeon RX 6600 XT. But the Radeon RX 6600 XT is the better value, undercutting it by $2,640 EUR for the performance you get.
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GeForce RTX 4090 vs Radeon RX 6600 XT: In-Depth Breakdown
Performance: GeForce RTX 4090 vs Radeon RX 6600 XT
The GeForce RTX 4090 is dramatically faster, around 300% ahead of the Radeon RX 6600 XT. 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 6600 XT is better matched to 1080p.
Price & Value
The Radeon RX 6600 XT currently lists from $550 EUR, $2,640 EUR less than the GeForce RTX 4090 at $3,190 EUR. Despite being slower, the Radeon RX 6600 XT offers the better performance-per-dollar (~45% better value), so budget-focused buyers should weigh it carefully. The Radeon RX 6600 XT still sits about $171 EUR above its $379 EUR MSRP. The GeForce RTX 4090 still sits about $1,591 EUR above its $1,599 EUR MSRP.
Power & Efficiency
On power, the Radeon RX 6600 XT is the gentler choice at 160W versus 450W. The GeForce RTX 4090 is more efficient per watt because it's faster, but its higher 450W draw means more heat and a bigger PSU. 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 carries 24GB versus 8GB on the Radeon RX 6600 XT. The extra 16GB helps at 4K, with high-resolution texture packs, and for content-creation or local-AI workloads that exhaust smaller buffers.
Features & Ecosystem
Beyond raw numbers, the GeForce RTX 4090 brings NVIDIA DLSS upscaling/frame generation and stronger ray tracing, while the Radeon RX 6600 XT 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 6600 XT?
Choose the GeForce RTX 4090 if you want the most performance and can absorb the higher price. If you're optimizing for value, the Radeon RX 6600 XT stretches your money further for only slightly lower performance.
Frequently Asked Questions
Is the GeForce RTX 4090 better than the Radeon RX 6600 XT?
Which is better for 4K gaming, the GeForce RTX 4090 or the Radeon RX 6600 XT?
Is the GeForce RTX 4090 worth the extra $2,640 EUR over the Radeon RX 6600 XT?
Does the GeForce RTX 4090 have enough VRAM advantage to matter?
Technical Specifications Comparison
Architecture & Cores
| Specification | GeForce RTX 4090 | Radeon RX 6600 XT |
|---|---|---|
| Architecture | Ada Lovelace | RDNA 2 |
| Process Node | TSMC 4N | TSMC N7 |
| CUDA Cores (CUDA Cores / Stream Processors) | 16,384✓ | 2,048 |
| Ray Tracing Cores | 128✓ | 32 |
| Tensor / AI Cores | 512 | — |
Clock Speeds
| Specification | GeForce RTX 4090 | Radeon RX 6600 XT |
|---|---|---|
| Base Clock | 2,235 MHz✓ | 1,968 MHz |
| Boost Clock | 2,520 MHz | 2,589 MHz✓ |
Memory
| Specification | GeForce RTX 4090 | Radeon RX 6600 XT |
|---|---|---|
| VRAM Capacity | 24 GB✓ | 8 GB |
| Memory Type | GDDR6X | GDDR6 |
| Memory Bus | 384-bit✓ | 128-bit |
| Memory Speed | 21 Gbps✓ | 16 Gbps |
| Bandwidth | 1,008 GB/s✓ | 256 GB/s |
Connectivity & Power
| Specification | GeForce RTX 4090 | Radeon RX 6600 XT |
|---|---|---|
| Interface | PCIe 4.0 x16 | PCIe 4.0 x8 |
| TDP | 450 W | 160 W✓ |
| Power Connectors | 1x 16-pin | 1x 8-pin |
| Released | Sep 2022 | Jul 2021 |