ATI Radeon HD 4855 vs R5 (Kaveri)
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1115 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | GCN 1.1 (2014) | TeraScale (2005−2013) |
| GPU code name | Kaveri | RV770 |
| Market segment | Laptop | Desktop |
| Release date | 4 June 2014 (11 years ago) | 3 January 2010 (15 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 | 256 | 640 |
| Core clock speed | 514 MHz | 575 MHz |
| Boost clock speed | 626 MHz | no data |
| Number of transistors | 2410 Million | 956 million |
| Manufacturing process technology | 28 nm | 55 nm |
| Power consumption (TDP) | no data | 110 Watt |
| Texture fill rate | no data | 18.40 |
| Floating-point processing power | no data | 0.736 TFLOPS |
| ROPs | no data | 16 |
| TMUs | no data | 32 |
| L1 Cache | no data | 128 KB |
| L2 Cache | no data | 256 KB |
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 | medium sized | no data |
| Interface | no data | PCIe 2.0 x16 |
| Length | no data | 220 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | no data | 1x 6-pin |
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 | no data | GDDR5 |
| Maximum RAM amount | no data | 512 MB |
| Memory bus width | 64/128 Bit | 256 Bit |
| Memory clock speed | no data | 900 MHz |
| Memory bandwidth | no data | 115.2 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 | no data | 1x DVI, 1x HDMI, 1x VGA |
| HDMI | - | + |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (FL 12_0) | 10.1 (10_1) |
| Shader Model | no data | 4.1 |
| OpenGL | no data | 3.3 |
| OpenCL | no data | 1.1 |
| Vulkan | - | N/A |
Pros & cons summary
| Recency | 4 June 2014 | 3 January 2010 |
| Chip lithography | 28 nm | 55 nm |
R5 (Kaveri) has an age advantage of 4 years, and a 96.4% more advanced lithography process.
We couldn't decide between Radeon R5 (Kaveri) and Radeon HD 4855. We've got no test results to judge.
Be aware that Radeon R5 (Kaveri) is a notebook graphics card while Radeon HD 4855 is a desktop one.
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