Radeon HD 6870 vs RadeonT 660M
Radeon HD 6870
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RadeonT 660M
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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.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar
Performance Per Dollar RadeonT 660M
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
⚠️ Generational Difference
The RadeonT 660M is significantly newer (2023 vs 2010). The RadeonT 660M likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The Radeon HD 6870 lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.
🚀 Performance Leadership
The RadeonT 660M is the superior choice for raw performance. It leads with a 0.7% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon HD 6870.
| Insight | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| Performance | ❌Lower raw frame rates (-0.7%) | ✅Leading raw performance (+0.7%) |
| Longevity | 🛑Obsolete Architecture (2010 / TeraScale 2 (2009−2015)) | RDNA 2.0 (2020−2025) (6nm) |
| 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 (247mm) | — |
💎 Value Proposition
While current pricing data is unavailable, the RadeonT 660M 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 6870 and RadeonT 660M
Radeon HD 6870
The Radeon HD 6870 is manufactured by AMD. It was released in October 21 2010. It features the TeraScale 2 architecture. The boost clock speed is 900 MHz. It has 1120 shading units. The thermal design power (TDP) is 151W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 2,206 points. Launch price was $239.
RadeonT 660M
The RadeonT 660M is manufactured by AMD. It was released in January 3 2023. It features the RDNA 2.0 architecture. The core clock ranges from 1500 MHz to 1900 MHz. It has 384 shading units. The thermal design power (TDP) is 40W. Manufactured using 6 nm process technology. It features 6 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 2,221 points.
Graphics Performance
The Radeon HD 6870 scores 2,206 and the RadeonT 660M reaches 2,221 in the G3D Mark benchmark — just a 0.7% difference, making them near-identical in rasterization performance. The Radeon HD 6870 is built on TeraScale 2 while the RadeonT 660M uses RDNA 2.0, both on 40 nm vs 6 nm. Shader units: 1,120 (Radeon HD 6870) vs 384 (RadeonT 660M). Raw compute: 2.016 TFLOPS (Radeon HD 6870) vs 1.459 TFLOPS (RadeonT 660M). Boost clocks: 900 MHz vs 1900 MHz.
| Feature | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| G3D Mark Score | 2,206 | 2,221 |
| Architecture | TeraScale 2 | RDNA 2.0 |
| Process Node | 40 nm | 6 nm |
| Shading Units | 1120+192% | 384 |
| Compute (TFLOPS) | 2.016 TFLOPS+38% | 1.459 TFLOPS |
| Boost Clock | 900 MHz | 1900 MHz+111% |
| ROPs | 32+100% | 16 |
| TMUs | 56+133% | 24 |
| L1 Cache | 224 KB+75% | 128 KB |
| L2 Cache | 0.5 MB | 2 MB+300% |
Advanced Features (DLSS/FSR)
| Feature | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| 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 GDDR5. Bus width: 128-bit vs 64-bit. L2 Cache: 0.5 MB (Radeon HD 6870) vs 2 MB (RadeonT 660M) — the RadeonT 660M has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| VRAM Capacity | 2 GB | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit+100% | 64-bit |
| L2 Cache | 0.5 MB | 2 MB+300% |
Display & API Support
DirectX support: 11.0 (Radeon HD 6870) vs 12 (12_2) (RadeonT 660M). Vulkan: N/A vs 1.3. OpenGL: 4.4 vs 4.6. Maximum simultaneous displays: 6 vs 3.
| Feature | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| DirectX | 11.0 | 12 (12_2)+9% |
| Vulkan | N/A | 1.3 |
| OpenGL | 4.4 | 4.6+5% |
| Max Displays | 6+100% | 3 |
Media & Encoding
Hardware encoder: None (Radeon HD 6870) vs VCN 3.0 (RadeonT 660M). Decoder: UVD 3.0 vs VCN 3.0. Supported codecs: MPEG-2,VC-1,H.264,MPEG-4,MVC (Radeon HD 6870) vs H.264,H.265,VP9,AV1,JPEG (RadeonT 660M).
| Feature | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| Encoder | None | VCN 3.0 |
| Decoder | UVD 3.0 | VCN 3.0 |
| Codecs | MPEG-2,VC-1,H.264,MPEG-4,MVC | H.264,H.265,VP9,AV1,JPEG |
Power & Dimensions
The Radeon HD 6870 draws 151W versus the RadeonT 660M's 40W — a 116.2% difference. The RadeonT 660M is more power-efficient. Recommended PSU: 500W (Radeon HD 6870) vs 350W (RadeonT 660M). Power connectors: 2x 6-pin vs PCIe-powered.
| Feature | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| TDP | 151W | 40W-74% |
| Recommended PSU | 500W | 350W-30% |
| Power Connector | 2x 6-pin | PCIe-powered |
| Length | 247mm | — |
| Height | 111mm | — |
| Slots | 2 | — |
| Temp (Load) | 85 | — |
| Perf/Watt | 14.6 | 55.5+280% |
Value Analysis
The RadeonT 660M is the newer GPU (2023 vs 2010).
| Feature | Radeon HD 6870 | RadeonT 660M |
|---|---|---|
| MSRP | $239 | — |
| Avg Price (30d) | $50 | — |
| Codename | Barts | Rembrandt+ |
| Release | October 21 2010 | January 3 2023 |
| Ranking | #661 | #565 |
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