GeForce GT 640 vs Radeon RX 550
Aggregated performance score
Radeon RX 550 outperforms GeForce GT 640 by 130% based on our aggregated benchmark results.
General info
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 519 | 726 |
| Place by popularity | 14 | not in top-100 |
| Value for money | 3.28 | 0.20 |
| Architecture | GCN 4.0 (2016−2020) | Kepler (2012−2018) |
| GPU code name | Lexa | GK107 |
| Market segment | Desktop | Desktop |
| Release date | 20 April 2017 (7 years ago) | 5 June 2012 (11 years ago) |
| Launch price (MSRP) | $79 | $99 |
| Current price | $121 (1.5x MSRP) | $157 (1.6x MSRP) |
Value for money
Performance to price ratio. The higher, the better.
RX 550 has 1540% better value for money than GT 640.
Technical specs
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 512 | 384 |
| Core clock speed | 1100 MHz | 902 MHz |
| Boost clock speed | 1183 MHz | no data |
| Number of transistors | 2,200 million | 1,270 million |
| Manufacturing process technology | 14 nm | 28 nm |
| Power consumption (TDP) | 50 Watt | 65 Watt |
| Texture fill rate | 37.86 | 28.86 |
| Floating-point performance | 1,211 gflops | 692.7 gflops |
Size and 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 3.0 x8 | PCIe 3.0 x16 |
| Length | 145 mm | 145 mm |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | None | None |
Memory
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 | DDR3 |
| Maximum RAM amount | 4 GB | 2 GB |
| Memory bus width | 128 Bit | 128 Bit |
| Memory clock speed | 7000 MHz | 1782 MHz |
| Memory bandwidth | 112.0 GB/s | 28.51 GB/s |
Video outputs and ports
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 1x DVI, 1x HDMI, 1x DisplayPort | 1x DVI, 1x HDMI, 1x DisplayPort |
| HDMI | + | + |
API support
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 12 (11_0) |
| Shader Model | 6.4 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 1.2 |
| Vulkan | 1.2.131 | 1.1.126 |
| CUDA | no data | 3.0 |
Synthetic benchmark performance
Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Radeon RX 550 outperforms GeForce GT 640 by 130% based on our aggregated benchmark results.
Passmark
This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Benchmark coverage: 25%
Radeon RX 550 outperforms GeForce GT 640 by 130% in Passmark.
GeekBench 5 OpenCL
Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.
Benchmark coverage: 9%
Radeon RX 550 outperforms GeForce GT 640 by 198% in GeekBench 5 OpenCL.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Advantages and disadvantages
| Performance score | 7.00 | 3.04 |
| Recency | 20 April 2017 | 5 June 2012 |
| Cost | $79 | $99 |
| Maximum RAM amount | 4 GB | 2 GB |
| Chip lithography | 14 nm | 28 nm |
| Power consumption (TDP) | 50 Watt | 65 Watt |
The Radeon RX 550 is our recommended choice as it beats the GeForce GT 640 in performance tests.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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