ATI Radeon HD 4855: specs and benchmarks
Summary
ATI started Radeon HD 4855 sales 3 January 2010. This is a desktop graphics card based on a TeraScale architecture and made with 55 nm manufacturing process. It is primarily aimed at gamer market. 512 MB of GDDR5 memory clocked at 3.6 GHz are supplied, and together with 256 Bit memory interface this creates a bandwidth of 115.2 GB/s.
Compatibility-wise, this is dual-slot card attached via PCIe 2.0 x16 interface. Its manufacturer default version has a length of 220 mm. 1x 6-pin power connector is required, and power consumption is at 110 Watt.
General info
Some basic facts about Radeon HD 4855: architecture, market segment, release date etc.
| Place in performance ranking | not rated | |
| Place by popularity | not in top-100 | |
| Architecture | TeraScale (2005−2013) | |
| GPU code name | RV770 | |
| Market segment | Desktop | |
| Release date | 3 January 2010 (14 years old) |
Technical specs
Radeon HD 4855's specs such as number of shaders, GPU base clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of Radeon HD 4855's performance, but for precise assessment you have to consider its benchmark and gaming test results.
| Pipelines / CUDA cores | 640 | of 20480 (Data Center GPU Max NEXT) |
| Core clock speed | 575 MHz | of 2610 (Radeon RX 6500 XT) |
| Number of transistors | 956 million | of 14400 (GeForce GTX 1070 SLI Mobile) |
| Manufacturing process technology | 55 nm | of 4 (Radeon 780M) |
| Power consumption (TDP) | 110 Watt | of 2400 (Data Center GPU Max Subsystem) |
| Texture fill rate | 18.40 | of 969.9 (H100 SXM5 96 GB) |
| Floating-point performance | 736.0 gflops | of 16384 (Radeon Pro Duo) |
Size and compatibility
This section provides details about the physical dimensions of Radeon HD 4855 and its compatibility with other computer components. This information is useful when selecting a computer configuration or upgrading an existing one. For desktop graphics cards, it includes details about the interface and bus (for motherboard compatibility) and additional power connectors (for power supply compatibility).
| Interface | PCIe 2.0 x16 | |
| Length | 220 mm | |
| Width | 2-slot | |
| Supplementary power connectors | 1x 6-pin |
Memory
Parameters of memory installed on Radeon HD 4855: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors have no dedicated memory and use a shared part of system RAM instead.
| Memory type | GDDR5 | |
| Maximum RAM amount | 512 MB | of 192 (Radeon Instinct MI300X) |
| Memory bus width | 256 Bit | of 8192 (Radeon Instinct MI250X) |
| Memory clock speed | 3600 MHz | of 23000 (GeForce RTX 4080 SUPER) |
| Memory bandwidth | 115.2 GB/s | of 3276 (Aldebaran) |
Video outputs and ports
Types and number of video connectors present on Radeon HD 4855. As a rule, this section is relevant only for desktop reference graphics cards, since for notebook ones the availability of certain video outputs depends on the laptop model, while non-reference desktop models can (though not necessarily will) bear a different set of video ports.
| Display Connectors | 1x DVI, 1x HDMI, 1x VGA | |
| HDMI | + |
API support
APIs supported by Radeon HD 4855, sometimes including their particular versions.
| DirectX | 10.1 (10_1) | |
| Shader Model | 4.1 | |
| OpenGL | 3.3 | of 4.6 (GeForce RTX 4090) |
| OpenCL | 1.1 | |
| Vulkan | N/A |
NVIDIA equivalent
According to our data, the closest NVIDIA alternative to Radeon HD 4855 is GeForce 920A.
Similar GPUs
Here is our recommendation of several graphics cards that are more or less close in performance to the one reviewed.
Recommended processors
These processors are most commonly used with Radeon HD 4855 according to our statistics.
