ATI Mobility Radeon HD 4670

The ATI Mobility Radeon HD 4670 is a mobile graphics solution from AMD, built on the TeraScale architecture with the M96 chip at its core. Fabricated on a 55 nm process at TSMC, this end-of-life part packs 514 million transistors into a 146 mm² die, yielding a transistor density of 3.5M / mm². With a memory clock of 800 MHz (1600 Mbps effective), the GPU is positioned for mainstream laptops of its generation, and its percentile ranking of 50 places it exactly at the median of all GPUs in the database. The following analysis breaks down its memory subsystem, feature set, power profile, competitive standing, and benchmark performance based solely on the provided data.

Memory Subsystem

The Mobility Radeon HD 4670 is equipped with 512 MB of GDDR3 memory, connected via a 128-bit bus. This configuration yields a memory bandwidth of 25.60 GB/s, calculated from the 800 MHz memory clock and the 1600 Mbps effective data rate. For high-resolution gaming, this bandwidth is a limiting factor; 512 MB of VRAM is modest by modern standards, and the 128-bit bus constrains how much data can be moved per clock cycle. In practice, this means that at resolutions above 1080p, texture streaming and frame buffer operations may encounter bottlenecks, particularly in scenes with large textures or heavy anti-aliasing. The pixel rate of 5.400 GPixel/s and texture rate of 21.60 GTexel/s are consistent with a part that can handle 720p or 900p gaming comfortably but will struggle to maintain fluid frame rates at 1440p or higher. The 8 ROPs further cap fill-rate-bound workloads, making the memory subsystem the primary constraint for demanding visual settings.

Ray Tracing and Feature Set

This GPU does not include dedicated ray tracing cores or tensor cores, as those technologies were not part of the TeraScale architecture. The feature set relies on more traditional rendering pathways. The shading units number 320, with 32 texture mapping units (TMUs) and 8 raster operation pipelines (ROPs). The FP32 compute throughput is rated at 432.0 GFLOPS, which is the peak single-precision performance available for general-purpose shader workloads. API support includes DirectX 10.1 (specifically the 10_1 feature level) and OpenGL 3.3; notably, Vulkan support is absent. For users seeking modern ray-traced effects or hardware-accelerated machine learning, this GPU is not equipped to handle such tasks. The absence of these cores means that any ray tracing or AI-based features would have to be emulated in software, which is impractical given the compute ceiling. DirectX 10.1 does provide some advanced shader model features over the base DirectX 10, but it predates the DirectX 12 era, so compatibility with newer titles may be limited to legacy modes or lower graphical presets.

Power and Cooling

The Mobility Radeon HD 4670 carries a thermal design power (TDP) of 35 W, which is relatively modest for a mobile discrete GPU. This power envelope allows for a compact cooling solution, though the exact cooler dimensions are not specified. The slot width is listed as an MXM Module, and the bus interface is MXM-A (3.0), indicating a standardized mobile form factor that can be integrated into laptop motherboards. There are no power connectors required, as the card draws power directly from the MXM slot, which simplifies installation and reduces cable clutter. The lack of a suggested PSU rating is irrelevant for mobile use, but for any potential desktop adapters, the 35 W draw is low enough that a standard system power supply would suffice without additional connections. Since no discrete power connectors are present, thermal management relies on the laptop’s internal cooling design, which should be adequate given the 35 W TDP. The display outputs are listed as "Portable Device Dependent," meaning that the actual ports (e.g., HDMI, DisplayPort, VGA) vary by laptop model and are not intrinsic to the GPU itself.

How It Compares

The nearest rival list is empty in the provided data, which means there are no direct comparison points from the FACT PACK. However, the percentile vs. all GPUs of 50 indicates that this GPU sits at the exact midpoint of the performance distribution across all GPUs tracked in the database. Without specific rival names or scores, the comparison must be framed qualitatively. The 35 W TDP positions it as a low-power part, likely intended for thin-and-light laptops or entry-level gaming machines. Against hypothetical peers from the same era, the 25.60 GB/s bandwidth and 432.0 GFLOPS FP32 performance would place it in the lower-midrange tier for mobile graphics. The 512 MB VRAM is a clear differentiator from higher-end mobile parts that would have offered 1 GB or more, and the lack of modern API support (no Vulkan, only DirectX 10.1) further separates it from later-generation GPUs. For a user considering this GPU today, the data suggests it is only suitable for legacy titles or basic 2D workloads, as the memory and compute resources are insufficient for contemporary 3D applications.

Benchmark Performance

The benchmark data for the ATI Mobility Radeon HD 4670 is notably sparse: the benchmarks array is empty, and the average benchmark score is listed as 0. This absence of direct scores means that numeric performance comparisons against rivals cannot be made using the FACT PACK. The only performance-related figure is the percentile rank of 50, which indicates that in the aggregate database of all GPUs, this part performs better than half and worse than half of the entries. This median placement is telling — it suggests that the GPU is neither a standout performer nor a complete laggard, but rather a thoroughly average mobile solution. The FP32 throughput of 432.0 GFLOPS, when considered alongside the pixel rate of 5.400 GPixel/s and texture rate of 21.60 GTexel/s, gives a theoretical peak that is broadly consistent with a mid-2000s mainstream mobile chip. However, without rival scores, exact percentage deltas cannot be computed. The data does not include any deltaPct values, nor does it list competitor names, so any claim of being "X% faster than Y" would be unsupported. What can be stated is that the 50th percentile ranking is a clear indicator of mediocrity — not a performance leader, but also not a bottom-tier part. For gaming, the 512 MB VRAM and 128-bit bus will cause stuttering in modern titles that demand more than 512 MB of frame buffer, and the DirectX 10.1 support limits compatibility with games that require DirectX 11 or higher. In synthetic workloads, the 432.0 GFLOPS FP32 figure is a hard ceiling for compute tasks, but real-world benchmarks would likely show degradation due to memory bandwidth constraints. The lack of benchmark entries in the FACT PACK means that this analysis must rely on architectural specifications and the percentile rank to infer performance, which is a less precise method than direct score comparisons. Ultimately, the data shows a GPU that is firmly average in its own time, and severely outdated in the present context, with no measurable advantage over any specific rival due to the absence of comparison data.