
Radeon 6600M
Popular choices:

Radeon R5 M255
Popular choices:
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 6600M is positioned at rank 587 and the Radeon R5 M255 is on rank 553, so the Radeon R5 M255 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Radeon 6600M
Performance Per Dollar Radeon R5 M255
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
⚠️ Generational Difference
The Radeon 6600M is significantly newer (2023 vs 2014). The Radeon 6600M likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The Radeon R5 M255 lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.
🚀 Performance Leadership
The Radeon R5 M255 is the superior choice for raw performance. It leads with a 1.3% 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 Radeon 6600M.
| Insight | Radeon 6600M | Radeon R5 M255 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-1.3%) | ✅Leading raw performance (+1.3%) |
| Longevity | RDNA 2.0 (2020−2025) (6nm) | 🛑Obsolete Architecture (2014 / GCN 1.0 (2012−2020)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+700%) |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| 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 Radeon 6600M and Radeon R5 M255

Radeon 6600M
The Radeon 6600M 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: 536 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 Radeon 6600M scores 536 and the Radeon R5 M255 reaches 543 in the G3D Mark benchmark — just a 1.3% difference, making them near-identical in rasterization performance. The Radeon 6600M is built on RDNA 2.0 while the Radeon R5 M255 uses GCN 1.0, both on 6 nm vs 28 nm. Shader units: 384 (Radeon 6600M) vs 640 (Radeon R5 M255). Raw compute: 1.459 TFLOPS (Radeon 6600M) vs 1.184 TFLOPS (Radeon R5 M255). Boost clocks: 1900 MHz vs 925 MHz.
| Feature | Radeon 6600M | Radeon R5 M255 |
|---|---|---|
| G3D Mark Score | 536 | 543+1% |
| Architecture | RDNA 2.0 | GCN 1.0 |
| Process Node | 6 nm | 28 nm |
| Shading Units | 384 | 640+67% |
| Compute (TFLOPS) | 1.459 TFLOPS+23% | 1.184 TFLOPS |
| Boost Clock | 1900 MHz+105% | 925 MHz |
| ROPs | 16 | 16 |
| TMUs | 24 | 40+67% |
| L1 Cache | 128 KB | 160 KB+25% |
| L2 Cache | 2 MB+700% | 0.25 MB |
Advanced Features (DLSS/FSR)
| Feature | Radeon 6600M | 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 | AMD Anti-Lag | AMD Anti-Lag |
Video Memory (VRAM)
The Radeon 6600M 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: System vs 128-bit. L2 Cache: 2 MB (Radeon 6600M) vs 0.25 MB (Radeon R5 M255) — the Radeon 6600M has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Radeon 6600M | Radeon R5 M255 |
|---|---|---|
| VRAM Capacity | 0.5 GB | 4 GB+700% |
| Memory Type | Shared | GDDR5 |
| Memory Bandwidth | System | Unknown |
| Bus Width | System | 128-bit |
| L2 Cache | 2 MB+700% | 0.25 MB |
Power & Dimensions
The Radeon 6600M draws 40W versus the Radeon R5 M255's 75W — a 60.9% difference. The Radeon 6600M is more power-efficient. Recommended PSU: 350W (Radeon 6600M) vs 350W (Radeon R5 M255). Power connectors: PCIe-powered vs Mobile.
| Feature | Radeon 6600M | Radeon R5 M255 |
|---|---|---|
| TDP | 40W-47% | 75W |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | Mobile |
| Slots | — | 0 |
| Temp (Load) | — | 80°C |
| Perf/Watt | 13.4+86% | 7.2 |
Value Analysis
The Radeon 6600M is the newer GPU (2023 vs 2014).
| Feature | Radeon 6600M | Radeon R5 M255 |
|---|---|---|
| MSRP | — | $150 |
| Avg Price (30d) | — | $30 |
| Codename | Rembrandt+ | Venus |
| Release | January 3 2023 | January 28 2014 |
| Ranking | #565 | #851 |
Top Performing GPUs
The most powerful gpus ranked by G3D Mark benchmark scores.
















