Radeon RX 640 OEM vs 660M
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 561 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 15.05 | no data |
| Architecture | RDNA 2.0 (2020−2025) | GCN 4.0 (2016−2020) |
| GPU code name | Rembrandt+ | Polaris 23 |
| Market segment | Laptop | Desktop |
| Release date | 3 January 2023 (2 years ago) | 9 April 2020 (5 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 | 384 | 640 |
| Core clock speed | 1500 MHz | 1295 MHz |
| Boost clock speed | 1900 MHz | no data |
| Number of transistors | 13,100 million | 2,200 million |
| Manufacturing process technology | 6 nm | 14 nm |
| Power consumption (TDP) | 40 Watt | 50 Watt |
| Texture fill rate | 45.60 | 51.80 |
| Floating-point processing power | 1.459 TFLOPS | 1.658 TFLOPS |
| ROPs | 16 | 16 |
| TMUs | 24 | 40 |
| Ray Tracing Cores | 6 | no data |
| L0 Cache | 96 KB | no data |
| L1 Cache | 128 KB | 160 KB |
| L2 Cache | 2 MB | 512 KB |
| L3 Cache | 8 MB | no data |
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 4.0 x8 | PCIe 3.0 x8 |
| Width | no data | 1-slot |
| Supplementary power connectors | None | 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 | System Shared | GDDR5 |
| Maximum RAM amount | System Shared | 4 GB |
| Memory bus width | System Shared | 128 Bit |
| Memory clock speed | System Shared | 1500 MHz |
| Memory bandwidth | no data | 96 GB/s |
| 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 | Portable Device Dependent | 1x DisplayPort 1.4a, 2x mini-DisplayPort 1.4a |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | 12 (12_0) |
| Shader Model | 6.7 | 6.7 (6.4) |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 2.1 |
| Vulkan | 1.3 | 1.3 |
Pros & cons summary
| Recency | 3 January 2023 | 9 April 2020 |
| Chip lithography | 6 nm | 14 nm |
| Power consumption (TDP) | 40 Watt | 50 Watt |
Radeon 660M has an age advantage of 2 years, a 133.3% more advanced lithography process, and 25% lower power consumption.
We couldn't decide between Radeon 660M and Radeon RX 640 OEM. We've got no test results to judge.
Be aware that Radeon 660M is a notebook graphics card while Radeon RX 640 OEM is a desktop one.
Other comparisons
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