ATI Radeon HD 4580 vs RX 455 OEM
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | GCN 2.0 (2013−2017) | TeraScale (2005−2013) |
| GPU code name | Tobago | RV635 |
| Market segment | Desktop | Desktop |
| Release date | 30 June 2016 (8 years ago) | 20 November 2011 (13 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 | 768 | 120 |
| Core clock speed | 1050 MHz | 796 MHz |
| Number of transistors | 2,080 million | 378 million |
| Manufacturing process technology | 28 nm | 55 nm |
| Power consumption (TDP) | 100 Watt | 65 Watt |
| Texture fill rate | 50.40 | 6.368 |
| Floating-point processing power | 1.613 TFLOPS | 0.191 TFLOPS |
| ROPs | 16 | 4 |
| TMUs | 48 | 8 |
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 3.0 x16 | PCIe 2.0 x16 |
| Length | 165 mm | 190 mm |
| Width | 1-slot | 1-slot |
| Supplementary power connectors | 1x 6-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 | GDDR5 | GDDR3 |
| Maximum RAM amount | 2 GB | 512 MB |
| Memory bus width | 128 Bit | 128 Bit |
| Memory clock speed | 1625 MHz | 693 MHz |
| Memory bandwidth | 104.0 GB/s | 22.18 GB/s |
Connectivity and outputs
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 | 2x DVI, 1x S-Video |
| HDMI | + | - |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 10.1 (10_1) |
| Shader Model | 6.3 | 4.1 |
| OpenGL | 4.6 | 3.3 |
| OpenCL | 2.0 | N/A |
| Vulkan | 1.2.131 | N/A |
Pros & cons summary
| Recency | 30 June 2016 | 20 November 2011 |
| Maximum RAM amount | 2 GB | 512 MB |
| Chip lithography | 28 nm | 55 nm |
| Power consumption (TDP) | 100 Watt | 65 Watt |
RX 455 OEM has an age advantage of 4 years, a 300% higher maximum VRAM amount, and a 96.4% more advanced lithography process.
ATI HD 4580, on the other hand, has 53.8% lower power consumption.
We couldn't decide between Radeon RX 455 OEM and Radeon HD 4580. We've got no test results to judge.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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