RTX PRO 4000 Blackwell SFF vs Radeon RX 640
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 650 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 7.88 | no data |
| Architecture | GCN 4.0 (2016−2020) | Blackwell 2.0 (2025) |
| GPU code name | Polaris 23 | GB203 |
| Market segment | Laptop | Workstation |
| Release date | 13 May 2019 (6 years ago) | 11 August 2025 (recently) |
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 | 640 | 8960 |
| Core clock speed | 1082 MHz | 790 MHz |
| Boost clock speed | 1218 MHz | 1337 MHz |
| Number of transistors | 2,200 million | 45,600 million |
| Manufacturing process technology | 14 nm | 5 nm |
| Power consumption (TDP) | 50 Watt | 70 Watt |
| Texture fill rate | 48.72 | 374.4 |
| Floating-point processing power | 1.559 TFLOPS | 23.96 TFLOPS |
| ROPs | 16 | 96 |
| TMUs | 40 | 280 |
| Tensor Cores | no data | 280 |
| Ray Tracing Cores | no data | 70 |
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).
| Laptop size | large | no data |
| Interface | PCIe 3.0 x8 | PCIe 5.0 x8 |
| Length | no data | 167 mm |
| 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 | GDDR5 | GDDR7 |
| Maximum RAM amount | 2 GB | 24 GB |
| Memory bus width | 64 Bit | 192 Bit |
| Memory clock speed | 1500 MHz | 1125 MHz |
| Memory bandwidth | 48 GB/s | 432.0 GB/s |
| Shared memory | - | - |
| Resizable BAR | - | + |
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 | No outputs | 4x mini-DisplayPort 2.1b |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| FreeSync | + | - |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 12 Ultimate (12_2) |
| Shader Model | 6.4 | 6.8 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 3.0 |
| Vulkan | 1.2.131 | 1.4 |
| CUDA | - | 12.0 |
| DLSS | - | + |
Pros & cons summary
| Recency | 13 May 2019 | 11 August 2025 |
| Maximum RAM amount | 2 GB | 24 GB |
| Chip lithography | 14 nm | 5 nm |
| Power consumption (TDP) | 50 Watt | 70 Watt |
RX 640 has 40% lower power consumption.
RTX PRO 4000 Blackwell SFF, on the other hand, has an age advantage of 6 years, a 1100% higher maximum VRAM amount, and a 180% more advanced lithography process.
We couldn't decide between Radeon RX 640 and RTX PRO 4000 Blackwell SFF. We've got no test results to judge.
Be aware that Radeon RX 640 is a notebook graphics card while RTX PRO 4000 Blackwell SFF is a workstation one.
Other comparisons
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