GeForce GT 645M vs Radeon HD 4850
GeForce GT 645M
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Radeon HD 4850
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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 GT 645M is positioned at rank 80 and the Radeon HD 4850 is on rank 237, so the GeForce GT 645M offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar GeForce GT 645M
Performance Per Dollar Radeon HD 4850
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Radeon HD 4850 is the superior choice for raw performance. It leads with a 0.1% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the GeForce GT 645M.
| Insight | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-0.1%) | ✅Leading raw performance (+0.1%) |
| Longevity | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) | 🛑Obsolete Architecture (2008 / TeraScale (2005−2013)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+0%) |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | — | Standard Size (246mm) |
💎 Value Proposition
While current pricing data is unavailable, the Radeon HD 4850 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 GT 645M and Radeon HD 4850
GeForce GT 645M
The GeForce GT 645M is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is Up to 710 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 945 points.
Radeon HD 4850
The Radeon HD 4850 is manufactured by AMD. It was released in June 25 2008. It features the TeraScale architecture. The core clock speed is 625 MHz. It has 800 shading units. The thermal design power (TDP) is 110W. Manufactured using 55 nm process technology. G3D Mark benchmark score: 946 points. Launch price was $199.
Graphics Performance
The GeForce GT 645M scores 945 and the Radeon HD 4850 reaches 946 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The GeForce GT 645M is built on Kepler while the Radeon HD 4850 uses TeraScale, both on 28 nm vs 55 nm. Shader units: 384 (GeForce GT 645M) vs 800 (Radeon HD 4850). Raw compute: 0.5445 TFLOPS (GeForce GT 645M) vs 1 TFLOPS (Radeon HD 4850).
| Feature | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| G3D Mark Score | 945 | 946 |
| Architecture | Kepler | TeraScale |
| Process Node | 28 nm | 55 nm |
| Shading Units | 384 | 800+108% |
| Compute (TFLOPS) | 0.5445 TFLOPS | 1 TFLOPS+84% |
| ROPs | 16 | 16 |
| TMUs | 32 | 40+25% |
| L1 Cache | 32 KB | 160 KB+400% |
| L2 Cache | 256 KB | 256 KB |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | AMD Anti-Lag |
Video Memory (VRAM)
Both cards feature 2 GB of GDDR5. Bus width: 128-bit vs 64-bit.
| Feature | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| VRAM Capacity | 2 GB | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit+100% | 64-bit |
| L2 Cache | 256 KB | 256 KB |
Display & API Support
DirectX support: 11.0 (GeForce GT 645M) vs 10.1 (Radeon HD 4850). Vulkan: 1.1 vs N/A. OpenGL: 4.5 vs 3.3. Maximum simultaneous displays: 1 vs 2.
| Feature | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| DirectX | 11.0+9% | 10.1 |
| Vulkan | 1.1 | N/A |
| OpenGL | 4.5+36% | 3.3 |
| Max Displays | 1 | 2+100% |
Media & Encoding
Hardware encoder: NVENC 1.0 (GeForce GT 645M) vs None (Radeon HD 4850). Decoder: PureVideo HD VP5 vs UVD 2.2. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 645M) vs MPEG-2,VC-1,H.264 (Radeon HD 4850).
| Feature | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| Encoder | NVENC 1.0 | None |
| Decoder | PureVideo HD VP5 | UVD 2.2 |
| Codecs | MPEG-2,H.264,VC-1,MPEG-4 ASP | MPEG-2,VC-1,H.264 |
Power & Dimensions
The GeForce GT 645M draws 32W versus the Radeon HD 4850's 110W — a 109.9% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 350W (GeForce GT 645M) vs 450W (Radeon HD 4850). Power connectors: PCIe-powered vs 1x 6-pin. Card length: 0mm vs 246mm, occupying 0 vs 1 slots. Typical load temperature: 70°C vs 95.
| Feature | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| TDP | 32W-71% | 110W |
| Recommended PSU | 350W-22% | 450W |
| Power Connector | PCIe-powered | 1x 6-pin |
| Length | 0mm | 246mm |
| Height | 0mm | 111mm |
| Slots | 0-100% | 1 |
| Temp (Load) | 70°C-26% | 95 |
| Perf/Watt | 29.5+243% | 8.6 |
Value Analysis
The GeForce GT 645M is the newer GPU (2012 vs 2008).
| Feature | GeForce GT 645M | Radeon HD 4850 |
|---|---|---|
| MSRP | — | $199 |
| Avg Price (30d) | — | $199 |
| Codename | GK107 | RV770 |
| Release | October 1 2012 | June 25 2008 |
| Ranking | #903 | #876 |
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