Radeon HD 4850 vs GeForce GT 645M
Radeon HD 4850
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GeForce GT 645M
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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 Radeon HD 4850 is positioned at rank 237 and the GeForce GT 645M is on rank 80, 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 Radeon HD 4850
Performance Per Dollar GeForce GT 645M
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 | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| Performance | ✅Leading raw performance (+0.1%) | ❌Lower raw frame rates (-0.1%) |
| Longevity | 🛑Obsolete Architecture (2008 / TeraScale (2005−2013)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+0%) |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| 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 Radeon HD 4850 and GeForce GT 645M
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.
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.
Graphics Performance
The Radeon HD 4850 scores 946 and the GeForce GT 645M reaches 945 in the G3D Mark benchmark — just a 0.1% difference, making them near-identical in rasterization performance. The Radeon HD 4850 is built on TeraScale while the GeForce GT 645M uses Kepler, both on 55 nm vs 28 nm. Shader units: 800 (Radeon HD 4850) vs 384 (GeForce GT 645M). Raw compute: 1 TFLOPS (Radeon HD 4850) vs 0.5445 TFLOPS (GeForce GT 645M).
| Feature | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| G3D Mark Score | 946 | 945 |
| Architecture | TeraScale | Kepler |
| Process Node | 55 nm | 28 nm |
| Shading Units | 800+108% | 384 |
| Compute (TFLOPS) | 1 TFLOPS+84% | 0.5445 TFLOPS |
| ROPs | 16 | 16 |
| TMUs | 40+25% | 32 |
| L1 Cache | 160 KB+400% | 32 KB |
| L2 Cache | 256 KB | 256 KB |
Advanced Features (DLSS/FSR)
| Feature | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| 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)
Both cards feature 2 GB of GDDR5. Bus width: 64-bit vs 128-bit.
| Feature | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| VRAM Capacity | 2 GB | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 64-bit | 128-bit+100% |
| L2 Cache | 256 KB | 256 KB |
Display & API Support
DirectX support: 10.1 (Radeon HD 4850) vs 11.0 (GeForce GT 645M). Vulkan: N/A vs 1.1. OpenGL: 3.3 vs 4.5. Maximum simultaneous displays: 2 vs 1.
| Feature | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| DirectX | 10.1 | 11.0+9% |
| Vulkan | N/A | 1.1 |
| OpenGL | 3.3 | 4.5+36% |
| Max Displays | 2+100% | 1 |
Media & Encoding
Hardware encoder: None (Radeon HD 4850) vs NVENC 1.0 (GeForce GT 645M). Decoder: UVD 2.2 vs PureVideo HD VP5. Supported codecs: MPEG-2,VC-1,H.264 (Radeon HD 4850) vs MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 645M).
| Feature | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| Encoder | None | NVENC 1.0 |
| Decoder | UVD 2.2 | PureVideo HD VP5 |
| Codecs | MPEG-2,VC-1,H.264 | MPEG-2,H.264,VC-1,MPEG-4 ASP |
Power & Dimensions
The Radeon HD 4850 draws 110W versus the GeForce GT 645M's 32W — a 109.9% difference. The GeForce GT 645M is more power-efficient. Recommended PSU: 450W (Radeon HD 4850) vs 350W (GeForce GT 645M). Power connectors: 1x 6-pin vs PCIe-powered. Card length: 246mm vs 0mm, occupying 1 vs 0 slots. Typical load temperature: 95 vs 70°C.
| Feature | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| TDP | 110W | 32W-71% |
| Recommended PSU | 450W | 350W-22% |
| Power Connector | 1x 6-pin | PCIe-powered |
| Length | 246mm | 0mm |
| Height | 111mm | 0mm |
| Slots | 1 | 0-100% |
| Temp (Load) | 95 | 70°C-26% |
| Perf/Watt | 8.6 | 29.5+243% |
Value Analysis
The GeForce GT 645M is the newer GPU (2012 vs 2008).
| Feature | Radeon HD 4850 | GeForce GT 645M |
|---|---|---|
| MSRP | $199 | — |
| Avg Price (30d) | $199 | — |
| Codename | RV770 | GK107 |
| Release | June 25 2008 | October 1 2012 |
| Ranking | #876 | #903 |
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