GeForce GTX 275 PhysX Edition vs ATI Radeon HD 4855
Contents
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 | TeraScale (2005−2013) | Tesla 2.0 (2007−2013) |
| GPU code name | RV770 | GT200B |
| Market segment | Desktop | Desktop |
| Release date | 3 January 2010 (15 years ago) | 16 February 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 | 640 | 240 |
| Core clock speed | 575 MHz | 633 MHz |
| Number of transistors | 956 million | 1,400 million |
| Manufacturing process technology | 55 nm | 55 nm |
| Power consumption (TDP) | 110 Watt | 219 Watt |
| Texture fill rate | 18.40 | 50.64 |
| Floating-point processing power | 0.736 TFLOPS | 0.6221 TFLOPS |
| ROPs | 16 | 28 |
| TMUs | 32 | 80 |
| L1 Cache | 128 KB | no data |
| L2 Cache | 256 KB | 224 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 | 220 mm | 267 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 1x 6-pin | 1x 6-pin + 1x 8-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 | GDDR5 | GDDR3 |
| Maximum RAM amount | 512 MB | 896 MB |
| Memory bus width | 256 Bit | 448 Bit |
| Memory clock speed | 900 MHz | 1134 MHz |
| Memory bandwidth | 115.2 GB/s | 127.0 GB/s |
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 | 1x DVI, 1x HDMI, 1x VGA | 2x DVI |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 10.1 (10_1) | 11.1 (10_0) |
| Shader Model | 4.1 | 4.0 |
| OpenGL | 3.3 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | N/A | N/A |
| CUDA | - | 1.3 |
Pros & cons summary
| Recency | 3 January 2010 | 16 February 2010 |
| Maximum RAM amount | 512 MB | 896 MB |
| Power consumption (TDP) | 110 Watt | 219 Watt |
ATI HD 4855 has 99.1% lower power consumption.
GTX 275 PhysX Edition, on the other hand, has an age advantage of 1 month, and a 75% higher maximum VRAM amount.
We couldn't decide between Radeon HD 4855 and GeForce GTX 275 PhysX Edition. We've got no test results to judge.
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