ATI Mobility Radeon HD 3670

The ATI Mobility Radeon HD 3670 is a mobile graphics processor from AMD, built on the TeraScale architecture and fabricated on TSMC's 55 nm process. It packs 378 million transistors into a 135 mm² die, with a transistor density of 2.8 million per square millimeter. Released in January 2008, this part was positioned as a mid-range mobile solution, and its 50th percentile ranking among all GPUs in the database reflects that standing. The GPU is now end-of-life, but its specifications and performance profile offer a window into the state of laptop graphics in the late 2000s.

Power and Cooling

The Mobility HD 3670 carries a 30 W TDP, which is modest for a discrete mobile GPU of its generation. This low thermal envelope allows for slim cooling solutions in notebooks, though the exact cooler design is not specified. The card is implemented as an MXM Module, using the MXM-II bus interface, meaning it is designed for laptop upgradeability rather than desktop use. No power connector is specified, and no PSU recommendation is provided, consistent with a part that draws power from the motherboard's dedicated GPU power delivery. The 55 nm process helps keep thermal and power requirements in check, while the 378 million transistor count is relatively low by modern standards. The end-of-life production status indicates that this GPU is no longer manufactured, and users should not expect ongoing power or thermal optimizations. For a 30 W part, the absence of an auxiliary power connector is typical; the MXM slot itself provides the necessary power rails. The lack of a suggested PSU further underscores that this is a mobile component, not a desktop card. In practical terms, the 30 W TDP means that a laptop equipped with this GPU would not require an oversized battery or an aggressive cooling fan, but it also caps the achievable performance.

Ray Tracing and Feature Set

The Mobility HD 3670 predates the era of hardware ray tracing. It has no dedicated RT cores or tensor cores; the architecture relies on 120 shading units, 8 texture mapping units, and 4 ROPs. These are the classic TeraScale building blocks. The GPU supports DirectX 10.1 (feature level 10_1) and OpenGL 3.3, but no Vulkan support is listed. This means it can handle games and applications that target those APIs, but it lacks the modern feature set required for ray-traced effects, DLSS, or similar technologies. The memory subsystem consists of 256 MB of GDDR3 on a 128-bit bus, delivering 25.60 GB/s of bandwidth. The memory clock is 800 MHz, with an effective data rate of 1600 Mbps. The pixel fill rate is 2.720 GPixel/s and the texture fill rate is 5.440 GTexel/s. Single-precision floating-point performance is 163.2 GFLOPS. These numbers define a part that was competent for its time but is now completely outclassed by modern GPUs in terms of both raw throughput and feature support. The lack of Vulkan support further limits its usefulness in contemporary titles, many of which rely on Vulkan for cross-platform rendering. For legacy DirectX 10.1 games, the HD 3670 can still execute the required shader workloads, but the small memory pool and low fill rates will quickly become bottlenecks at higher resolutions or with detailed textures.

Benchmark Performance

The database records no average benchmark score for the ATI Mobility Radeon HD 3670; the avgBenchmarkScore field is 0. This likely reflects the scarcity of standardized benchmarks for this mobile part. However, its percentileVsAllGpus is 50, which places it exactly at the median of all GPUs tracked by the database. That is a remarkable position for a 2008 mobile GPU, suggesting that it outperforms half of the GPUs ever cataloged. The theoretical performance figures reinforce this: 163.2 GFLOPS of FP32 compute, 2.720 GPixel/s pixel fill, and 5.440 GTexel/s texture fill. For context, these numbers are far below any modern discrete GPU, but they were respectable for a 30 W mobile part in the late 2000s. The 256 MB memory capacity is a significant limitation, as even entry-level desktop GPUs of that era often had 512 MB or 1 GB. The 128-bit bus and 25.60 GB/s bandwidth further constrain memory-bound workloads. In practice, the GPU would struggle with high-resolution textures and large frame buffers. The 50th percentile ranking should be interpreted with caution: it includes a wide range of GPUs from different eras and form factors. Nevertheless, it indicates that the Mobility HD 3670 was not a bottom-tier part; it held its own in the middle of the pack. The absence of a benchmark score means we cannot offer a direct performance delta against any specific rival, but the percentile rank provides a broad positional anchor.

How It Compares

Because the database lists no nearest rivals for this GPU, we must rely on its position within its own product lineage. The Mobility HD 3670 sits between the M7x and M9x generations, as its predecessor and successor, respectively. The M7x generation was older and less capable, while the M9x brought architectural improvements. The 50th percentile ranking suggests that the HD 3670 outperformed many older parts but was surpassed by later ones. In the absence of direct rival scores, the theoretical specifications provide a baseline: 120 shaders, 8 TMUs, and 4 ROPs are modest numbers, but they are consistent with a mid-range mobile GPU of 2008. The 30 W TDP is low enough to be integrated into thin laptops, yet high enough to offer discrete performance over integrated graphics. Compared to the integrated graphics of its era, the HD 3670 would have offered a significant advantage, but we cannot quantify that without rival data. The lack of a launch MSRP also prevents any cost-based positioning. Ultimately, the HD 3670 is a part that occupies a clear middle ground: not a flagship, not an entry-level chip, but a dependable mid-range option for its time. Its 50th percentile standing reinforces this view—it is exactly average, no more, no less, when placed against the full historical spectrum of GPUs.

Who Should Consider It

Given its 2008 release and end-of-life status, the ATI Mobility Radeon HD 3670 is not a candidate for modern gaming or professional workloads. Its 256 MB memory and 128-bit bus limit it to low-resolution textures and modest settings. The GPU lacks hardware ray tracing and tensor cores, so any workload that relies on those features is out of the question. For retro gaming or legacy applications, the HD 3670 can handle DirectX 10.1 titles at low to medium settings, provided the resolution is kept modest. The 30 W TDP makes it suitable for laptops that prioritize battery life over raw performance. The 50th percentile ranking suggests that, in its prime, it was a capable mid-range solution. However, the absence of Vulkan support and the small memory buffer mean that even older games may need reduced settings. Users who need to run modern software should look elsewhere. For collectors or those maintaining vintage laptops, the HD 3670 offers a functional, if unspectacular, graphics experience. The MXM-II form factor allows for potential upgrades, but the end-of-life status means that new replacements are unlikely. In summary, the HD 3670 is a product of its era, best suited for low-demand applications and historical interest. It is not a GPU that will satisfy any contemporary performance expectation, but as a historical data point, it demonstrates the balance of power, features, and thermals that defined mid-range mobile graphics in 2008.