Radeon 660M vs ATI HD 3850 X3
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 565 |
| Place by popularity | not in top-100 | 97 |
| Power efficiency | no data | 14.78 |
| Architecture | TeraScale (2005−2013) | RDNA 2.0 (2020−2025) |
| GPU code name | RV670 | Rembrandt+ |
| Market segment | Desktop | Laptop |
| Release date | no data | 3 January 2023 (2 years ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 320 | 384 |
| Core clock speed | 669 MHz | 1500 MHz |
| Boost clock speed | no data | 1900 MHz |
| Number of transistors | 666 million | 13,100 million |
| Manufacturing process technology | 55 nm | 6 nm |
| Power consumption (TDP) | 145 Watt | 40 Watt |
| Texture fill rate | 10.70 | 45.60 |
| Floating-point processing power | no data | 1.459 TFLOPS |
| ROPs | 16 | 16 |
| TMUs | 16 | 24 |
| Ray Tracing Cores | no data | 6 |
| L0 Cache | no data | 96 KB |
| L1 Cache | no data | 128 KB |
| L2 Cache | no data | 2 MB |
| L3 Cache | no data | 8 MB |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 2.0 x16 | PCIe 4.0 x8 |
| Length | 292 mm | no data |
| Width | 2-slot | no data |
| Supplementary power connectors | 1x 8-pin | None |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR3 | System Shared |
| Maximum RAM amount | 512 MB | System Shared |
| Memory bus width | 256 Bit | System Shared |
| Memory clock speed | 1700 MBps | System Shared |
| Memory bandwidth | 54.4 GB/s | no data |
| Shared memory | - | + |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 4x DVI | Portable Device Dependent |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 10.1 (10_1) | 12 Ultimate (12_2) |
| Shader Model | 4.1 | 6.7 |
| OpenGL | 3.3 (full) 4.0 (partial) | 4.6 |
| OpenCL | N/A | 2.0 |
| Vulkan | N/A | 1.3 |
Pros & cons summary
| Chip lithography | 55 nm | 6 nm |
| Power consumption (TDP) | 145 Watt | 40 Watt |
Radeon 660M has a 816.7% more advanced lithography process, and 262.5% lower power consumption.
We couldn't decide between Radeon HD 3850 X3 and Radeon 660M. We've got no test results to judge.
Be aware that Radeon HD 3850 X3 is a desktop graphics card while Radeon 660M is a notebook one.
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