Radeon 660M vs ATI X850 XT
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 329 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 28.15 |
| Architecture | R400 (2004−2008) | RDNA 2.0 (2020−2024) |
| GPU code name | R480 | Rembrandt+ |
| Market segment | Desktop | Laptop |
| Release date | 1 December 2004 (19 years ago) | 3 January 2023 (1 year 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 | no data | 384 |
| Core clock speed | 520 MHz | 1500 MHz |
| Boost clock speed | no data | 1900 MHz |
| Number of transistors | 160 million | 13,100 million |
| Manufacturing process technology | 130 nm | 6 nm |
| Power consumption (TDP) | 69 Watt | 40 Watt |
| Texture fill rate | 8.320 | 45.60 |
| Floating-point processing power | no data | 1.459 TFLOPS |
| ROPs | 16 | 16 |
| TMUs | 16 | 24 |
| Ray Tracing Cores | no data | 6 |
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 1.0 x16 | PCIe 4.0 x8 |
| Width | 2-slot | no data |
| 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 | GDDR3 | System Shared |
| Maximum RAM amount | 256 MB | System Shared |
| Memory bus width | 256 Bit | System Shared |
| Memory clock speed | 540 MHz | System Shared |
| Memory bandwidth | 34.56 GB/s | no data |
| Shared memory | - | - |
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 | 2x DVI, 1x S-Video | Portable Device Dependent |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 9.0b (9_2) | 12 Ultimate (12_2) |
| Shader Model | no data | 6.7 |
| OpenGL | 2.0 | 4.6 |
| OpenCL | N/A | 2.0 |
| Vulkan | N/A | 1.3 |
Synthetic benchmark performance
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
Passmark
This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Pros & cons summary
| Recency | 1 December 2004 | 3 January 2023 |
| Chip lithography | 130 nm | 6 nm |
| Power consumption (TDP) | 69 Watt | 40 Watt |
Radeon 660M has an age advantage of 18 years, a 2066.7% more advanced lithography process, and 72.5% lower power consumption.
We couldn't decide between Radeon X850 XT and Radeon 660M. We've got no test results to judge.
Be aware that Radeon X850 XT is a desktop card while Radeon 660M is a notebook one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
