AMD Radeon HD 6630M Mac Edition

Power and Cooling

The AMD Radeon HD 6630M Mac Edition carries a TDP of 26 W, placing it firmly in the low-power mobile segment. This modest thermal envelope is a direct consequence of its 40 nm TSMC manufacturing process, which packs 716 million transistors into a die size of 118 mm². The resulting transistor density of 6.1M per mm² is typical for the era, allowing the GPU to operate within power constraints suitable for portable devices.

The fact pack lists no dedicated power connector requirements, no slot width, and no suggested PSU rating. This absence is telling—the card is designed for notebook integration where power delivery is handled through the motherboard's PCIe 2.0 x16 interface. The bus interface itself draws power directly from the slot, and with a TDP this low, additional external power connections would be unnecessary. For systems relying on this GPU, the 26 W figure indicates that thermal management is straightforward, requiring only a basic cooling solution adequate for low-power mobile parts.

The display outputs are listed as "Portable Device Dependent," meaning connectivity varies by laptop implementation. This further reinforces the mobile-oriented design, where the GPU's power characteristics are secondary to the host system's overall thermal design. Benchmark data shows the GPU sits at the 50th percentile among all GPUs, a median position that aligns with its modest power budget. The end-of-life production status, with release dating to January 2011, situates this part in an era where 40 nm processes were the norm for mobile graphics.

Ray Tracing and Feature Set

This GPU does not include dedicated ray tracing cores or tensor cores—the fact pack lists both as null. The architecture is TeraScale 2, AMD's unified shader design from the Vancouver generation (HD 6600M family). This predates hardware-accelerated ray tracing by nearly a decade, so the feature set relies entirely on traditional rasterization techniques.

API support includes DirectX 11.2 (11_0) and OpenGL 4.4, with no Vulkan support listed. The DirectX 11_0 feature level is significant: it enables tessellation and compute shaders, but lacks the DirectX 12 and Vulkan low-level API access that modern titles demand. For the era, DirectX 11.2 support was contemporary, though the 11_0 feature level indicates the hardware's capabilities match the baseline DirectX 11 specification rather than later revisions.

The shading resources comprise 480 shading units, 24 texture mapping units, and 8 ROPs. This configuration yields a pixel rate of 4.000 GPixel/s and a texture rate of 12.00 GTexel/s. The lack of tensor cores means no AI-accelerated features like DLSS or similar upscaling technologies. Ray tracing, if mentioned in any software, would run entirely on the shader units, which are insufficient for real-time ray-traced workloads. In practice, this GPU is limited to rasterized rendering with DirectX 11 or OpenGL 4.4 applications, making it unsuitable for modern games that require Vulkan or DirectX 12.

Benchmark Performance

The benchmark section shows an average benchmark score of 0 with no individual benchmark entries listed. This makes quantitative performance analysis challenging, but the 50th percentile ranking among all GPUs provides context. The nearestRivals array is empty, meaning no direct comparison data exists in the fact pack to calculate relative performance deltas.

The FP32 compute throughput is 480.0 GFLOPS, derived from the 480 shading units operating at the memory clock-derived frequency. The texture rate of 12.00 GTexel/s and pixel rate of 4.000 GPixel/s give a sense of the raw throughput capabilities. For context, a GPU with 480 shaders at this performance level would handle 720p gaming modestly and 1080p with reduced settings in titles from its release era.

Without benchmark scores or rival comparisons, the 50th percentile rank is the sole performance indicator. This median position suggests the GPU performs at the midpoint of all GPUs ever tested in the database, which for a 2011 mobile part is reasonable—it outperforms integrated graphics and low-end discrete parts of its generation while lagging behind desktop mid-range and high-end offerings. The absence of benchmark data points means the percentile ranking must be interpreted cautiously, as it may reflect a limited sample size or the GPU's presence in systems with varying CPU and memory configurations.

How It Compares

The fact pack lists no nearest rivals, leaving this section without direct comparison data. The GPU's position must therefore be inferred from its architectural characteristics and the 50th percentile rank.

Against integrated graphics solutions of its era, the 256 MB of dedicated GDDR5 memory provides a significant advantage. Integrated parts shared system memory, which was typically slower DDR3, and had far fewer shading units. The 480 shading units here would outperform most integrated solutions by a substantial margin, though no percentage figures exist in the fact pack to quantify this advantage.

Compared to desktop discrete GPUs of the same generation, this mobile part would fall significantly behind. Desktop equivalents had higher clock speeds, wider memory buses (typically 128-bit or 256-bit versus the 64-bit bus here), and greater power budgets. The 26 W TDP constraint limits performance to roughly the level of entry-level desktop cards, though again, no specific deltas are available.

Against later mobile GPUs, this card is clearly outclassed. The 40 nm process, 256 MB memory, and 64-bit bus represent early-2010s technology. Modern integrated graphics in CPUs have surpassed this performance level. The end-of-life status confirms the GPU's obsolescence in the current market.

The empty nearestRivals list means no quantitative comparisons are possible. The 50th percentile rank, however, places it exactly at the median of all GPUs in the database—neither particularly strong nor weak relative to the full historical range of graphics hardware.

Memory Subsystem

The memory configuration is one of the most distinctive aspects of this GPU: 256 MB of GDDR5 on a 64-bit bus, yielding a bandwidth of 19.20 GB/s. The memory clock runs at 600 MHz with an effective data rate of 2.4 Gbps. This combination of a narrow bus and high-speed memory is typical for low-power mobile parts, balancing cost, power consumption, and bandwidth.

The 64-bit bus is the primary bottleneck. At 19.20 GB/s, the bandwidth is adequate for 720p gaming with moderate texture quality but becomes restrictive at higher resolutions. Modern games at 1080p typically require texture buffers exceeding 256 MB, causing the GPU to fall back to slower system memory access or drop textures. The 256 MB capacity is particularly limiting—even at release, this was considered small, and it severely constrains the GPU's ability to handle high-resolution textures or multiple render targets.

For high-resolution workloads, the data indicates significant limitations. The 19.20 GB/s bandwidth means that even if the 480 shading units could compute faster, the memory subsystem would starve them of data. Pixel throughput of 4.000 GPixel/s is also modest, limiting fill-rate-heavy operations at high resolutions. The combination of 256 MB capacity and 64-bit bus effectively caps this GPU at 1366×768 or 1600×900 resolution with reduced detail settings in most modern titles.

The GDDR5 memory type is a positive attribute—it provides higher bandwidth per pin than DDR3 or DDR4, and at 2.4 Gbps effective, it operates at a reasonable frequency for the era. However, the narrow bus negates much of this advantage. A wider bus with slower memory would have provided similar bandwidth with better capacity scaling, but the 64-bit design was chosen for power and cost reasons consistent with the 26 W TDP. For the Mac Edition specifically, the memory configuration suggests Apple targeted this at entry-level MacBook Pro models where battery life and thermals took precedence over raw graphics performance.