
GeForce GT 820M vs Radeon R5 M255

GeForce GT 820M
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Radeon R5 M255
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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 820M is positioned at rank 134 and the Radeon R5 M255 is on rank 553, so the GeForce GT 820M 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 820M
Performance Per Dollar Radeon R5 M255
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Radeon R5 M255 is the superior choice for raw performance. It leads with a 0.2% higher G3D Mark score and 700% more VRAM (4 GB vs 512 MB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the GeForce GT 820M.
| Insight | GeForce GT 820M | Radeon R5 M255 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-0.2%) | ✅Leading raw performance (+0.2%) |
| Longevity | 🛑Obsolete Architecture (2014 / Maxwell 2.0 (2014−2019)) | 🛑Obsolete Architecture (2014 / GCN 1.0 (2012−2020)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+700%) |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | — | — |
💎 Value Proposition
While current pricing data is unavailable, the Radeon R5 M255 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 820M and Radeon R5 M255

GeForce GT 820M
The GeForce GT 820M is manufactured by NVIDIA. It was released in October 7 2014. It features the Maxwell 2.0 architecture. The core clock ranges from 1038 MHz to 1127 MHz. It has 1536 shading units. The thermal design power (TDP) is 100W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 542 points.

Radeon R5 M255
The Radeon R5 M255 is manufactured by AMD. It was released in January 28 2014. It features the GCN 1.0 architecture. The core clock ranges from 900 MHz to 925 MHz. It has 640 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 543 points. Launch price was $799.99.
Graphics Performance
The GeForce GT 820M scores 542 and the Radeon R5 M255 reaches 543 in the G3D Mark benchmark — just a 0.2% difference, making them near-identical in rasterization performance. The GeForce GT 820M is built on Maxwell 2.0 while the Radeon R5 M255 uses GCN 1.0, both on a 28 nm process. Shader units: 1,536 (GeForce GT 820M) vs 640 (Radeon R5 M255). Raw compute: 1.659 TFLOPS (GeForce GT 820M) vs 1.184 TFLOPS (Radeon R5 M255). Boost clocks: 1127 MHz vs 925 MHz.
| Feature | GeForce GT 820M | Radeon R5 M255 |
|---|---|---|
| G3D Mark Score | 542 | 543 |
| Architecture | Maxwell 2.0 | GCN 1.0 |
| Process Node | 28 nm | 28 nm |
| Shading Units | 1536+140% | 640 |
| Compute (TFLOPS) | 1.659 TFLOPS+40% | 1.184 TFLOPS |
| Boost Clock | 1127 MHz+22% | 925 MHz |
| ROPs | 64+300% | 16 |
| TMUs | 96+140% | 40 |
| L1 Cache | 576 KB+260% | 160 KB |
| L2 Cache | 2 MB+700% | 0.25 MB |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 820M | Radeon R5 M255 |
|---|---|---|
| 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)
The GeForce GT 820M comes with 512 MB of VRAM, while the Radeon R5 M255 has 4 GB. The Radeon R5 M255 offers 700% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 64-bit vs 128-bit. L2 Cache: 2 MB (GeForce GT 820M) vs 0.25 MB (Radeon R5 M255) — the GeForce GT 820M has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce GT 820M | Radeon R5 M255 |
|---|---|---|
| VRAM Capacity | 0.5 GB | 4 GB+700% |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 64-bit | 128-bit+100% |
| L2 Cache | 2 MB+700% | 0.25 MB |
Display & API Support
DirectX support: 11.0 (GeForce GT 820M) vs 12 (Radeon R5 M255). Vulkan: None vs 1.2. OpenGL: 4.0 vs 4.3. Maximum simultaneous displays: 1 vs 2.
| Feature | GeForce GT 820M | Radeon R5 M255 |
|---|---|---|
| DirectX | 11.0 | 12+9% |
| Vulkan | None | 1.2 |
| OpenGL | 4.0 | 4.3+7% |
| Max Displays | 1 | 2+100% |
Media & Encoding
Hardware encoder: No (GeForce GT 820M) vs VCE 3.0 (Radeon R5 M255). Decoder: PureVideo HD VP4 vs UVD 4.2. Supported codecs: MPEG-2,H.264,VC-1,MPEG-4 ASP (GeForce GT 820M) vs H.264,MPEG-4,MPEG-2,VC-1 (Radeon R5 M255).
| Feature | GeForce GT 820M | Radeon R5 M255 |
|---|---|---|
| Encoder | No | VCE 3.0 |
| Decoder | PureVideo HD VP4 | UVD 4.2 |
| Codecs | MPEG-2,H.264,VC-1,MPEG-4 ASP | H.264,MPEG-4,MPEG-2,VC-1 |
Power & Dimensions
The GeForce GT 820M draws 100W versus the Radeon R5 M255's 75W — a 28.6% difference. The Radeon R5 M255 is more power-efficient. Recommended PSU: 350W (GeForce GT 820M) vs 350W (Radeon R5 M255). Power connectors: PCIe-powered vs Mobile. Typical load temperature: 70°C vs 80°C.
| Feature | GeForce GT 820M | Radeon R5 M255 |
|---|---|---|
| TDP | 100W | 75W-25% |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | Mobile |
| Length | 0mm | — |
| Height | 0mm | — |
| Slots | 0 | 0 |
| Temp (Load) | 70°C-13% | 80°C |
| Perf/Watt | 5.4 | 7.2+33% |
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