Radeon 820M vs Radeon HD 7770
Radeon 820M
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Radeon HD 7770
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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. The Radeon 820M is positioned at rank #62 in our cost-efficiency ranking, representing a Balanced cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Radeon 820M
Performance Per Dollar
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
⚠️ Generational Difference
The Radeon 820M is significantly newer (2024 vs 2012). The Radeon 820M likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The Radeon HD 7770 lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.
🚀 Performance Leadership
The Radeon HD 7770 is the superior choice for raw performance. It leads with a 1.4% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon 820M.
| Insight | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-1.4%) | ✅Leading raw performance (+1.4%) |
| Longevity | RDNA 3+ (2024) (4nm) | 🛑Obsolete Architecture (2012 / GCN 1.0 (2012−2020)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+0%) |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | — | 📏 Compact / SFF Friendly |
💎 Value Proposition
The Radeon 820M offers a compelling cost-to-performance ratio. Priced at $25 versus $50 for the Radeon HD 7770, it costs 50% less. While it maintains basic entry-level capabilities, this results in a 97.2% higher cost efficiency score.
| Insight | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| Cost Efficiency | ✅Better overall value (+97.2%) | ❌Lower cost efficiency |
| Upfront Cost | ✅More affordable ($25) | ⚠️Higher upfront cost ($50) |
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 820M and Radeon HD 7770
Radeon 820M
The Radeon 820M 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 128 shading units. The thermal design power (TDP) is 30W. Manufactured using 4 nm process technology. G3D Mark benchmark score: 2,143 points.
Radeon HD 7770
The Radeon HD 7770 is manufactured by AMD. It was released in February 15 2012. It features the GCN 1.0 architecture. The core clock speed is 1000 MHz. It has 640 shading units. The thermal design power (TDP) is 80W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,173 points. Launch price was $159.
Graphics Performance
The Radeon 820M scores 2,143 and the Radeon HD 7770 reaches 2,173 in the G3D Mark benchmark — just a 1.4% difference, making them near-identical in rasterization performance. The Radeon 820M is built on RDNA 3+ while the Radeon HD 7770 uses GCN 1.0, both on 4 nm vs 28 nm. Shader units: 128 (Radeon 820M) vs 640 (Radeon HD 7770).
| Feature | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| G3D Mark Score | 2,143 | 2,173+1% |
| Architecture | RDNA 3+ | GCN 1.0 |
| Process Node | 4 nm | 28 nm |
| Shading Units | 128 | 640+400% |
Advanced Features (DLSS/FSR)
| Feature | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| 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 | AMD Anti-Lag |
Video Memory (VRAM)
Both cards feature 2 GB of video memory. Bus width: System vs 128-bit.
| Feature | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| VRAM Capacity | 2 GB | 2 GB |
| Memory Type | Shared | GDDR5 |
| Memory Bandwidth | System | 72 GB/s |
| Bus Width | System | 128-bit |
Display & API Support
DirectX support: 12 Ultimate (Radeon 820M) vs 12_0 (Radeon HD 7770). Maximum simultaneous displays: 4 vs 4.
| Feature | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| DirectX | 12 Ultimate | 12_0 |
| Max Displays | 4 | 4 |
Media & Encoding
Hardware encoder: VCN 4.0 (Radeon 820M) vs VCE 1.0 (Radeon HD 7770). Decoder: VCN 4.0 vs UVD 3.1. Supported codecs: H.264,H.265,AV1,VP9 (Radeon 820M) vs H.264 (Radeon HD 7770).
| Feature | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| Encoder | VCN 4.0 | VCE 1.0 |
| Decoder | VCN 4.0 | UVD 3.1 |
| Codecs | H.264,H.265,AV1,VP9 | H.264 |
Power & Dimensions
The Radeon 820M draws 30W versus the Radeon HD 7770's 80W — a 90.9% difference. The Radeon 820M is more power-efficient. Recommended PSU: 350W (Radeon 820M) vs 450W (Radeon HD 7770). Power connectors: PCIe-powered vs 1x 6-pin. Card length: 0mm vs 210mm, occupying 0 vs 2 slots.
| Feature | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| TDP | 30W-63% | 80W |
| Recommended PSU | 350W-22% | 450W |
| Power Connector | PCIe-powered | 1x 6-pin |
| Length | 0mm | 210mm |
| Height | 0mm | — |
| Slots | 0-100% | 2 |
| Temp (Load) | 80 | — |
| Perf/Watt | 71.4+163% | 27.2 |
Value Analysis
The Radeon 820M costs 50% less ($25 savings) at current market prices. Performance per dollar (G3D Mark / price): 85.7 (Radeon 820M) vs 43.5 (Radeon HD 7770) — the Radeon 820M offers 97% better value. The Radeon 820M is the newer GPU (2024 vs 2012).
| Feature | Radeon 820M | Radeon HD 7770 |
|---|---|---|
| MSRP | — | $159 |
| Avg Price (30d) | $25-50% | $50 |
| Performance per Dollar | 85.7+97% | 43.5 |
| Codename | Krackan Point | Cape Verde |
| Release | June 2 2024 | February 15 2012 |
| Ranking | #669 | #664 |
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