Radeon HD 6990M vs Radeon 660M
Radeon HD 6990M
Popular choices:
Radeon 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. The Radeon HD 6990M is positioned at rank 233 and the Radeon 660M is on rank 399, so the Radeon HD 6990M 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 6990M
Performance Per Dollar Radeon 660M
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
⚠️ Generational Difference
The Radeon 660M is significantly newer (2023 vs 2011). The Radeon 660M likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The Radeon HD 6990M lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.
🚀 Performance Leadership
The Radeon HD 6990M is the superior choice for raw performance. It leads with a 1.3% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon 660M.
| Insight | Radeon HD 6990M | Radeon 660M |
|---|---|---|
| Performance | ✅Leading raw performance (+1.3%) | ❌Lower raw frame rates (-1.3%) |
| Longevity | 🛑Obsolete Architecture (2011 / 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 | — | — |
💎 Value Proposition
While current pricing data is unavailable, the Radeon HD 6990M 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 6990M and Radeon 660M
Radeon HD 6990M
The Radeon HD 6990M is manufactured by AMD. It was released in July 12 2011. It features the TeraScale 2 architecture. The core clock speed is 715 MHz. It has 1120 shading units. The thermal design power (TDP) is 100W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 3,264 points.
Radeon 660M
The Radeon 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: 3,221 points.
Graphics Performance
The Radeon HD 6990M scores 3,264 and the Radeon 660M reaches 3,221 in the G3D Mark benchmark — just a 1.3% difference, making them near-identical in rasterization performance. The Radeon HD 6990M is built on TeraScale 2 while the Radeon 660M uses RDNA 2.0, both on 40 nm vs 6 nm. Shader units: 1,120 (Radeon HD 6990M) vs 384 (Radeon 660M). Raw compute: 1.602 TFLOPS (Radeon HD 6990M) vs 1.459 TFLOPS (Radeon 660M).
| Feature | Radeon HD 6990M | Radeon 660M |
|---|---|---|
| G3D Mark Score | 3,264+1% | 3,221 |
| Architecture | TeraScale 2 | RDNA 2.0 |
| Process Node | 40 nm | 6 nm |
| Shading Units | 1120+192% | 384 |
| Compute (TFLOPS) | 1.602 TFLOPS+10% | 1.459 TFLOPS |
| 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 6990M | Radeon 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 Shared. Bus width: System vs System. L2 Cache: 0.5 MB (Radeon HD 6990M) vs 2 MB (Radeon 660M) — the Radeon 660M has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Radeon HD 6990M | Radeon 660M |
|---|---|---|
| VRAM Capacity | 2 GB | 2 GB |
| Memory Type | Shared | Shared |
| Memory Bandwidth | System | System |
| Bus Width | System | System |
| L2 Cache | 0.5 MB | 2 MB+300% |
Power & Dimensions
The Radeon HD 6990M draws 100W versus the Radeon 660M's 40W — a 85.7% difference. The Radeon 660M is more power-efficient. Recommended PSU: 350W (Radeon HD 6990M) vs 350W (Radeon 660M). Power connectors: 1x 6-pin vs PCIe-powered.
| Feature | Radeon HD 6990M | Radeon 660M |
|---|---|---|
| TDP | 100W | 40W-60% |
| Recommended PSU | 350W | 350W |
| Power Connector | 1x 6-pin | PCIe-powered |
| Perf/Watt | 32.6 | 80.5+147% |
Top Performing GPUs
The most powerful gpus ranked by G3D Mark benchmark scores.
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