
Mobility Radeon HD 4650 vs GeForce GT 420M

Mobility Radeon HD 4650
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GeForce GT 420M
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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 Mobility Radeon HD 4650 is positioned at rank 398 and the GeForce GT 420M is on rank 113, so the GeForce GT 420M offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Mobility Radeon HD 4650
Performance Per Dollar GeForce GT 420M
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Mobility Radeon HD 4650 is the superior choice for raw performance. It leads with a 2.3% higher G3D Mark score and 100% more VRAM (1 GB vs 512 MB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the GeForce GT 420M.
| Insight | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| Performance | ✅Leading raw performance (+2.3%) | ❌Lower raw frame rates (-2.3%) |
| Longevity | 🛑Obsolete Architecture (2010 / TeraScale 2 (2009−2015)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| 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 Mobility Radeon HD 4650 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 Mobility Radeon HD 4650 and GeForce GT 420M

Mobility Radeon HD 4650
The Mobility Radeon HD 4650 is manufactured by AMD. It was released in January 7 2010. It features the TeraScale 2 architecture. The core clock speed is 700 MHz. It has 800 shading units. The thermal design power (TDP) is 50W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 401 points.

GeForce GT 420M
The GeForce GT 420M is manufactured by NVIDIA. It was released in March 22 2012. It features the Kepler architecture. The core clock ranges from Up to 625 MHz to 645 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 392 points.
Graphics Performance
The Mobility Radeon HD 4650 scores 401 and the GeForce GT 420M reaches 392 in the G3D Mark benchmark — just a 2.3% difference, making them near-identical in rasterization performance. The Mobility Radeon HD 4650 is built on TeraScale 2 while the GeForce GT 420M uses Kepler, both on 40 nm vs 28 nm. Shader units: 800 (Mobility Radeon HD 4650) vs 384 (GeForce GT 420M). Raw compute: 1.12 TFLOPS (Mobility Radeon HD 4650) vs 0.48 TFLOPS (GeForce GT 420M).
| Feature | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| G3D Mark Score | 401+2% | 392 |
| Architecture | TeraScale 2 | Kepler |
| Process Node | 40 nm | 28 nm |
| Shading Units | 800+108% | 384 |
| Compute (TFLOPS) | 1.12 TFLOPS+133% | 0.48 TFLOPS |
| ROPs | 16 | 16 |
| TMUs | 40+25% | 32 |
| L1 Cache | 80 KB+150% | 32 KB |
| L2 Cache | 256 KB | 256 KB |
Advanced Features (DLSS/FSR)
| Feature | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | AMD Anti-Lag | Standard |
Video Memory (VRAM)
The Mobility Radeon HD 4650 comes with 1 GB of VRAM, while the GeForce GT 420M has 512 MB. The Mobility Radeon HD 4650 offers 100% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 128-bit.
| Feature | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| VRAM Capacity | 1 GB+100% | 0.5 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit | 128-bit |
| L2 Cache | 256 KB | 256 KB |
Display & API Support
DirectX support: 10.1 (Mobility Radeon HD 4650) vs 11.0 (GeForce GT 420M). Vulkan: N/A vs None. OpenGL: 3.3 vs 4.0. Maximum simultaneous displays: 2 vs 1.
| Feature | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| DirectX | 10.1 | 11.0+9% |
| Vulkan | N/A | None |
| OpenGL | 3.3 | 4.0+21% |
| Max Displays | 2+100% | 1 |
Media & Encoding
Hardware encoder: None (Mobility Radeon HD 4650) vs No (GeForce GT 420M). Decoder: UVD 2.2 vs PureVideo HD VP4. Supported codecs: H.264,VC-1,MPEG-2 (Mobility Radeon HD 4650) vs MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 420M).
| Feature | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| Encoder | None | No |
| Decoder | UVD 2.2 | PureVideo HD VP4 |
| Codecs | H.264,VC-1,MPEG-2 | MPEG-2,H.264,VC-1,MPEG-4 ASP |
Power & Dimensions
The Mobility Radeon HD 4650 draws 50W versus the GeForce GT 420M's 32W — a 43.9% difference. The GeForce GT 420M is more power-efficient. Recommended PSU: 350W (Mobility Radeon HD 4650) vs 350W (GeForce GT 420M). Power connectors: PCIe-powered vs PCIe-powered. Card length: 0mm vs 0mm, occupying 0 vs 0 slots. Typical load temperature: 80 vs 75°C.
| Feature | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| TDP | 50W | 32W-36% |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | PCIe-powered |
| Length | 0mm | 0mm |
| Height | 0mm | 0mm |
| Slots | 0 | 0 |
| Temp (Load) | 80 | 75°C-6% |
| Perf/Watt | 8.0 | 12.3+54% |
Value Analysis
The GeForce GT 420M is the newer GPU (2012 vs 2010).
| Feature | Mobility Radeon HD 4650 | GeForce GT 420M |
|---|---|---|
| MSRP | $49 | — |
| Avg Price (30d) | $15 | — |
| Codename | Broadway | GK107 |
| Release | January 7 2010 | March 22 2012 |
| Ranking | #846 | #909 |
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