GeForce GTX 680MX vs Radeon 840M
GeForce GTX 680MX
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Radeon 840M
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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. The GeForce GTX 680MX is positioned at rank 79 and the Radeon 840M is on rank 24, so the Radeon 840M offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar GeForce GTX 680MX
Performance Per Dollar Radeon 840M
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
⚠️ Generational Difference
The Radeon 840M is significantly newer (2024 vs 2012). The Radeon 840M likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The GeForce GTX 680MX lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.
🚀 Performance Leadership
The Radeon 840M is the superior choice for raw performance. It leads with a 0.1% higher G3D Mark score. However, the GeForce GTX 680MX offers more VRAM, which may be beneficial for texture-heavy scenarios at higher resolutions.
| Insight | GeForce GTX 680MX | Radeon 840M |
|---|---|---|
| Performance | ❌Lower raw frame rates (-0.1%) | ✅Leading raw performance (+0.1%) |
| Longevity | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) | RDNA 3+ (2024) (4nm) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+100%) | ❌ Less VRAM capacity |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | — | — |
💎 Value Proposition
While current pricing data is unavailable, the Radeon 840M 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 GeForce GTX 680MX and Radeon 840M
GeForce GTX 680MX
The GeForce GTX 680MX is manufactured by NVIDIA. It was released in October 23 2012. It features the Kepler architecture. The core clock speed is 720 MHz. It has 1536 shading units. The thermal design power (TDP) is 122W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 3,799 points.
Radeon 840M
The Radeon 840M is manufactured by AMD. It was released in June 2 2024. It features the RDNA 3+ architecture. The boost clock speed is 2900 MHz. It has 256 shading units. The thermal design power (TDP) is 30W. Manufactured using 4 nm process technology. G3D Mark benchmark score: 3,803 points.
Graphics Performance
The GeForce GTX 680MX scores 3,799 and the Radeon 840M reaches 3,803 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The GeForce GTX 680MX is built on Kepler while the Radeon 840M uses RDNA 3+, both on 28 nm vs 4 nm. Shader units: 1,536 (GeForce GTX 680MX) vs 256 (Radeon 840M).
| Feature | GeForce GTX 680MX | Radeon 840M |
|---|---|---|
| G3D Mark Score | 3,799 | 3,803 |
| Architecture | Kepler | RDNA 3+ |
| Process Node | 28 nm | 4 nm |
| Shading Units | 1536+500% | 256 |
Advanced Features (DLSS/FSR)
| Feature | GeForce GTX 680MX | Radeon 840M |
|---|---|---|
| Upscaling Tech | FSR 2.1 (Compatible) | FSR 1.0 (Software) |
| Frame Generation | FSR 3 (Compatible) | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | AMD Anti-Lag |
Video Memory (VRAM)
The GeForce GTX 680MX comes with 4 GB of VRAM, while the Radeon 840M has 2 GB. The GeForce GTX 680MX offers 100% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 256-bit vs System.
| Feature | GeForce GTX 680MX | Radeon 840M |
|---|---|---|
| VRAM Capacity | 4 GB+100% | 2 GB |
| Memory Type | GDDR5 | Shared |
| Memory Bandwidth | 160 GB/s | System |
| Bus Width | 256-bit | System |
Display & API Support
DirectX support: 12 (11_0) (GeForce GTX 680MX) vs 12 Ultimate (12_2) (Radeon 840M). Vulkan: 1.2 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 4 vs 4.
| Feature | GeForce GTX 680MX | Radeon 840M |
|---|---|---|
| DirectX | 12 (11_0) | 12 Ultimate (12_2) |
| Vulkan | 1.2 | 1.3+8% |
| OpenGL | 4.6 | 4.6 |
| Max Displays | 4 | 4 |
Media & Encoding
Hardware encoder: NVENC (Kepler) (GeForce GTX 680MX) vs VCN 4.0 (Radeon 840M). Decoder: NVDEC (Kepler) vs VCN 4.0. Supported codecs: H.264,MPEG-1,MPEG-2,VC-1 (GeForce GTX 680MX) vs H.264,H.265,AV1,VP9 (Radeon 840M).
| Feature | GeForce GTX 680MX | Radeon 840M |
|---|---|---|
| Encoder | NVENC (Kepler) | VCN 4.0 |
| Decoder | NVDEC (Kepler) | VCN 4.0 |
| Codecs | H.264,MPEG-1,MPEG-2,VC-1 | H.264,H.265,AV1,VP9 |
Power & Dimensions
The GeForce GTX 680MX draws 122W versus the Radeon 840M's 30W — a 121.1% difference. The Radeon 840M is more power-efficient. Recommended PSU: 350W (GeForce GTX 680MX) vs 350W (Radeon 840M). Power connectors: 1x 6-pin vs PCIe-powered. Typical load temperature: 80 vs 90.
| Feature | GeForce GTX 680MX | Radeon 840M |
|---|---|---|
| TDP | 122W | 30W-75% |
| Recommended PSU | 350W | 350W |
| Power Connector | 1x 6-pin | PCIe-powered |
| Length | 0mm | — |
| Height | 0mm | — |
| Slots | 0 | 0 |
| Temp (Load) | 80-11% | 90 |
| Perf/Watt | 31.1 | 126.8+308% |
Top Performing GPUs
The most powerful gpus ranked by G3D Mark benchmark scores.
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