ATI Radeon HD 4855 vs ION 2
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1382 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 1.15 | no data |
| Architecture | Tesla 2.0 (2007−2013) | TeraScale (2005−2013) |
| GPU code name | GT218 | RV770 |
| Market segment | Laptop | Desktop |
| Release date | 3 June 2008 (17 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 | 16 | 640 |
| Core clock speed | 500 MHz | 575 MHz |
| Number of transistors | 260 million | 956 million |
| Manufacturing process technology | 40 nm | 55 nm |
| Power consumption (TDP) | 20 Watt | 110 Watt |
| Texture fill rate | 4.000 | 18.40 |
| Floating-point processing power | 0.03424 TFLOPS | 0.736 TFLOPS |
| ROPs | 4 | 16 |
| TMUs | 8 | 32 |
| L1 Cache | no data | 128 KB |
| L2 Cache | 32 KB | 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).
| Interface | PCIe 2.0 x16 | 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 | System Shared | GDDR5 |
| Maximum RAM amount | System Shared | 512 MB |
| Memory bus width | System Shared | 256 Bit |
| Memory clock speed | System Shared | 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 outputs | 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 | 11.1 (10_1) | 10.1 (10_1) |
| Shader Model | 4.1 | 4.1 |
| OpenGL | 3.3 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | N/A | N/A |
| CUDA | 1.2 | - |
Pros & cons summary
| Recency | 3 June 2008 | 3 January 2010 |
| Chip lithography | 40 nm | 55 nm |
| Power consumption (TDP) | 20 Watt | 110 Watt |
ION 2 has a 37.5% more advanced lithography process, and 450% lower power consumption.
ATI HD 4855, on the other hand, has an age advantage of 1 year.
We couldn't decide between ION 2 and Radeon HD 4855. We've got no test results to judge.
Be aware that ION 2 is a notebook graphics card while Radeon HD 4855 is a desktop one.
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