CPU
GPU
Radeon RX 6900 XT
Popular choices:
GeForce RTX 4090 Mobile
Popular choices:
Performance Spectrum - GPU
About G3D Mark
G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (G3D Mark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Radeon RX 6900 XT
Performance Per Dollar GeForce RTX 4090 Mobile
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce RTX 4090 Mobile is the superior choice for raw performance. It leads with a 1.2% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon RX 6900 XT.
| Insight | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| Performance | ❌Lower raw frame rates (-1.2%) | ✅Leading raw performance (+1.2%) |
| Longevity | 🔮Strong Longevity (RDNA 2.0 (2020−2025) / 7nm) | 🏆Elite Architecture (Ada Lovelace (2022−2024) / 4nm) |
| Ecosystem | Supports FSR Upscaling | ✨ DLSS 3/4 + Frame Gen Support |
| VRAM | 🎮 High Capacity (16 GB) | 🎮 High Capacity (16 GB) |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | Standard Size (267mm) | — |
💎 Value Proposition
While current pricing data is unavailable, the GeForce RTX 4090 Mobile remains the clear technical winner. Check real-time availability to determine if the performance gap justifies the market price.
Performance Check
Real-world benchmarks and performance projections based on comprehensive hardware analysis and comparative metrics. Values represent expected performance on High/Ultra settings at 1080p, 1440p, and 4K. Modeled using a Ryzen 7 7800X3D reference profile to minimize specific CPU bottlenecks.
Note: Performance behavior can vary per game. Specific architectures may perform better or worse depending on game engine optimizations and API implementation.
Technical Specifications
Side-by-side comparison of Radeon RX 6900 XT and GeForce RTX 4090 Mobile
Radeon RX 6900 XT
The Radeon RX 6900 XT is manufactured by AMD. It was released in October 28 2020. It features the RDNA 2.0 architecture. The core clock ranges from 1825 MHz to 2250 MHz. It has 5120 shading units. The thermal design power (TDP) is 300W. Manufactured using 7 nm process technology. It features 80 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 26,729 points. Launch price was $999.
GeForce RTX 4090 Mobile
The GeForce RTX 4090 Mobile is manufactured by NVIDIA. It was released in January 3 2023. It features the Ada Lovelace architecture. The core clock ranges from 1335 MHz to 1695 MHz. It has 9728 shading units. The thermal design power (TDP) is 120W. Manufactured using 4 nm process technology. It features 76 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 27,048 points.
Graphics Performance
The Radeon RX 6900 XT scores 26,729 and the GeForce RTX 4090 Mobile reaches 27,048 in the G3D Mark benchmark — just a 1.2% difference, making them near-identical in rasterization performance. The Radeon RX 6900 XT is built on RDNA 2.0 while the GeForce RTX 4090 Mobile uses Ada Lovelace, both on 7 nm vs 4 nm. Shader units: 5,120 (Radeon RX 6900 XT) vs 9,728 (GeForce RTX 4090 Mobile). Raw compute: 23.04 TFLOPS (Radeon RX 6900 XT) vs 32.98 TFLOPS (GeForce RTX 4090 Mobile). Boost clocks: 2250 MHz vs 1695 MHz. Ray tracing: 80 RT cores (Radeon RX 6900 XT) vs 76 (GeForce RTX 4090 Mobile) vs 304.
| Feature | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| G3D Mark Score | 26,729 | 27,048+1% |
| Architecture | RDNA 2.0 | Ada Lovelace |
| Process Node | 7 nm | 4 nm |
| Shading Units | 5120 | 9728+90% |
| Compute (TFLOPS) | 23.04 TFLOPS | 32.98 TFLOPS+43% |
| Boost Clock | 2250 MHz+33% | 1695 MHz |
| ROPs | 128+14% | 112 |
| TMUs | 320+5% | 304 |
| L1 Cache | 1 MB | 9.5 MB+850% |
| L2 Cache | 4 MB | 64 MB+1500% |
| Ray Tracing Cores | 80+5% | 76 |
Advanced Features (DLSS/FSR)
Both cards support modern Frame Generation technology, allowing them to insert intermediate frames to smoothen motion and boost perceived FPS in supported games.
| Feature | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| Upscaling Tech | FSR 3 (Native) | DLSS 3.5 |
| Frame Generation | FSR 3 / AFMF (Driver) | DLSS 3.0 (Native) |
| Ray Reconstruction | No | Yes (DLSS 3.5) |
| Low Latency | AMD Anti-Lag | NVIDIA Reflex |
Video Memory (VRAM)
Both cards feature 16 GB of GDDR6. Memory bandwidth: 512 GB/s (Radeon RX 6900 XT) vs 576 GB/s (GeForce RTX 4090 Mobile) — a 12.5% advantage for the GeForce RTX 4090 Mobile. Bus width: 256-bit vs 256-bit. L2 Cache: 4 MB (Radeon RX 6900 XT) vs 64 MB (GeForce RTX 4090 Mobile) — the GeForce RTX 4090 Mobile has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| VRAM Capacity | 16 GB | 16 GB |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bandwidth | 512 GB/s | 576 GB/s+13% |
| Bus Width | 256-bit | 256-bit |
| L2 Cache | 4 MB | 64 MB+1500% |
Display & API Support
DirectX support: 12 Ultimate (Radeon RX 6900 XT) vs 12.2 (GeForce RTX 4090 Mobile). Vulkan: 1.3 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 4 vs 1.
| Feature | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| DirectX | 12 Ultimate | 12.2+2% |
| Vulkan | 1.3 | 1.3 |
| OpenGL | 4.6 | 4.6 |
| Max Displays | 4+300% | 1 |
Media & Encoding
Hardware encoder: VCN 3.0 (Radeon RX 6900 XT) vs 8th Gen NVENC (GeForce RTX 4090 Mobile). Decoder: VCN 3.0 vs 5th Gen NVDEC. Supported codecs: H.264,H.265/HEVC,AV1,VP9 (Radeon RX 6900 XT) vs MPEG-2,H.264,HEVC,VP9,AV1 (GeForce RTX 4090 Mobile).
| Feature | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| Encoder | VCN 3.0 | 8th Gen NVENC |
| Decoder | VCN 3.0 | 5th Gen NVDEC |
| Codecs | H.264,H.265/HEVC,AV1,VP9 | MPEG-2,H.264,HEVC,VP9,AV1 |
Power & Dimensions
The Radeon RX 6900 XT draws 300W versus the GeForce RTX 4090 Mobile's 120W — a 85.7% difference. The GeForce RTX 4090 Mobile is more power-efficient. Recommended PSU: 850W (Radeon RX 6900 XT) vs 650W (GeForce RTX 4090 Mobile). Power connectors: 2x 8-pin vs Mobile. Card length: 267mm vs 0mm, occupying 2.5 vs 0 slots. Typical load temperature: 80°C vs 80°C.
| Feature | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| TDP | 300W | 120W-60% |
| Recommended PSU | 850W | 650W-24% |
| Power Connector | 2x 8-pin | Mobile |
| Length | 267mm | 0mm |
| Height | 120mm | 0mm |
| Slots | 2.5 | 0-100% |
| Temp (Load) | 80°C | 80°C |
| Perf/Watt | 89.1 | 225.4+153% |
Value Analysis
The GeForce RTX 4090 Mobile is the newer GPU (2023 vs 2020).
| Feature | Radeon RX 6900 XT | GeForce RTX 4090 Mobile |
|---|---|---|
| MSRP | $999 | — |
| Avg Price (30d) | $385 | — |
| Codename | Navi 21 | AD103 |
| Release | October 28 2020 | January 3 2023 |
| Ranking | #35 | #30 |
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