ATI Mobility Radeon HD 4830

The ATI Mobility Radeon HD 4830 is a mobile graphics processor from AMD, built on the TeraScale architecture using the M97 chip. Fabricated by TSMC on a 40 nm process, it integrates 826 million transistors on a 137 mm² die, resulting in a transistor density of 6.0M / mm². With 640 shading units, 32 texture mapping units, and 16 raster operation pipelines, this part targets the upper-midrange laptop segment of its generation, offering 640.0 GFLOPS of FP32 compute, a texture rate of 16.00 GTexel/s, and a pixel rate of 8.000 GPixel/s. The memory subsystem pairs 1024 MB of GDDR3 on a 128-bit bus, delivering 25.60 GB/s of bandwidth at a memory clock of 800 MHz (1600 Mbps effective). It supports PCIe 2.0 x16, DirectX 10.1 (10_1), and OpenGL 3.3, and is now marked as end-of-life, with its release dated 2009-03-02.

Benchmark Performance

The benchmark data for the ATI Mobility Radeon HD 4830 is sparse, with an average benchmark score of 0 and no individual benchmark entries listed in the fact pack. However, its percentile rank against all GPUs stands at 50, placing it exactly at the median of the distribution. This indicates that, within the historical context of GPUs tracked by the database, the HD 4830 performs at a midpoint level—neither a low-end part nor a high-performance flagship, but a balanced mobile solution for its era.

The absence of nearest rival data means there are no direct percentage comparisons to other specific models. Instead, the percentile of 50 serves as the primary positional metric. A score at the 50th percentile implies that roughly half of all GPUs in the database outperform it, while the other half are slower. For a mobile part from 2009, this positioning suggests it was a competent mainstream option, capable of handling contemporary titles at moderate settings, but not designed for extreme workloads. The FP32 throughput of 640.0 GFLOPS, combined with a texture rate of 16.00 GTexel/s, provides a theoretical ceiling that aligns with such a classification. The pixel rate of 8.000 GPixel/s further reinforces this, indicating sufficient fill for resolutions common at the time, though modern high-density displays would strain this capability.

Without rival scores, the analysis must rely on architectural and clock-derived figures. The memory bandwidth of 25.60 GB/s, while modest by today’s standards, was typical for a 128-bit GDDR3 configuration in mobile parts. This bandwidth, paired with 640 shading units, suggests that compute-heavy scenes would be limited by memory throughput rather than raw shading power. In practical terms, benchmark results would likely show strong performance in older DirectX 10 titles, but a noticeable drop in scenes requiring high texture fetch rates or large data sets. The 50th percentile ranking is a useful anchor: it tells the reader that this GPU sits in the middle of the pack, a reasonable baseline for a laptop graphics solution of its time.

Ray Tracing and Feature Set

The ATI Mobility Radeon HD 4830 does not include dedicated ray tracing cores or tensor cores, as these are absent from the fact pack. This is consistent with its TeraScale architecture, which predates hardware-accelerated ray tracing by several generations. The GPU relies entirely on traditional rasterization techniques for rendering, with no support for real-time ray tracing workloads. Any ray tracing effects would have to be handled via software or compute shaders, which would be severely constrained by the 640.0 GFLOPS of FP32 performance and the lack of specialized hardware.

The feature set is defined by its API support: DirectX 10.1 (specifically the 10_1 feature level) and OpenGL 3.3. DirectX 10.1 introduced improvements over DirectX 10, including better shader model support and enhanced texture formats, but it does not include features like tessellation or compute shaders that came with DirectX 11. OpenGL 3.3 support allows for a range of modern effects, including geometry shaders and multiple render targets, but again lacks the later extensions for bindless textures or explicit multi-GPU control. Vulkan is not supported, which means the GPU cannot leverage modern low-overhead APIs. This limits its compatibility with contemporary games that require Vulkan or DirectX 12, though it can still run many older titles.

The memory configuration—1024 MB of GDDR3 on a 128-bit bus—defines the visual fidelity ceiling. With 25.60 GB/s of bandwidth, high-resolution textures are feasible but may cause stuttering in scenes with heavy streaming. The 16 ROPs handle pixel output at 8.000 GPixel/s, which is sufficient for 720p or 1366x768 resolutions at moderate settings. The lack of tensor cores means no AI-accelerated features like DLSS, and the absence of RT cores precludes any form of hardware ray tracing. For a GPU of this vintage, the feature set is purely rasterization-focused, with API support that matches its 2009 release timeframe.

Who Should Consider It

Given its 50th percentile ranking, the ATI Mobility Radeon HD 4830 is suited for users running legacy applications or older games that target DirectX 10.1 or OpenGL 3.3. At resolutions around 1366x768, the pixel rate of 8.000 GPixel/s and texture rate of 16.00 GTexel/s are adequate for medium settings in titles from the 2008-2011 era. The 1024 MB VRAM is sufficient for 720p textures, though users should avoid ultra-high texture packs due to the 25.60 GB/s bandwidth constraint. For esports titles from that period, such as early Counter-Strike or StarCraft II, the GPU can hold playable frame rates at low-to-medium presets.

This GPU is not appropriate for modern gaming. The DirectX 10.1 API limit means many current titles will fail to launch or run with severe compatibility issues. Even if a game supports OpenGL 3.3, the 640.0 GFLOPS of FP32 compute is far below what contemporary engines require. Users seeking to play anything released after 2015 should look elsewhere. However, for retro gaming, legacy productivity applications, or a secondary machine for older software, the HD 4830 offers a baseline experience. Its 40 nm process and 826 million transistors suggest modest power draw, though no TDP is listed, making it a plausible option for thin-and-light laptops of its time.

The 50th percentile position means it outperforms half of all GPUs in the database, so within its own generation, it was a solid mid-range choice. Those who value compatibility with Windows 7-era software and do not need modern graphics features will find it acceptable. The 16 ROPs and 32 TMUs provide a balanced ratio for 4:3 or 16:9 aspect ratios common in older monitors. For any workload involving ray tracing, tensor-based AI, or high-resolution VR, this GPU is categorically unsuitable due to the missing hardware cores and memory bandwidth limits.

FAQ

Q: Does the ATI Mobility Radeon HD 4830 support DirectX 12?

A: No. The fact pack lists DirectX support as 10.1 (10_1), with no mention of DirectX 11 or 12. It is limited to that API version.

Q: What is the memory bandwidth of this GPU?

A: The memory bandwidth is 25.60 GB/s, derived from 1024 MB of GDDR3 on a 128-bit bus with a memory clock of 800 MHz (1600 Mbps effective).

Q: Can this GPU handle hardware ray tracing?

A: No. The fact pack does not list any ray tracing cores or tensor cores, and the TeraScale architecture does not include such hardware.

Q: What is the transistor count and die size?

A: The GPU has 826 million transistors on a 137 mm² die, produced on a 40 nm process at TSMC, giving a transistor density of 6.0M / mm².

Q: What is the FP32 performance in GFLOPS?

A: The FP32 performance is 640.0 GFLOPS, based on 640 shading units operating at the given clocks.

Q: Is Vulkan supported?

A: No. The fact pack lists Vulkan as null, indicating no support. OpenGL 3.3 is the highest OpenGL version available.

How It Compares

The fact pack lists no nearest rivals for the ATI Mobility Radeon HD 4830, meaning there are no direct competitor scores or deltaPct values to reference. The only positional metric is the percentileVsAllGpus of 50, which places it exactly at the median of all GPUs in the database. This implies that when compared to the broader GPU landscape, it sits in the middle—a typical mainstream mobile part. Without rival names or scores, a comparative analysis must be inferred from its own specifications. Its 640 shading units and 25.60 GB/s bandwidth would place it above entry-level integrated graphics of its era, but below dedicated high-end mobile parts that featured wider memory buses or more compute units. The 16 ROPs limit pixel fill, while the 32 TMUs provide moderate texture throughput, suggesting a balanced design for 720p gaming. In the absence of specific rival data, the 50th percentile serves as the definitive comparative statement: it is neither a standout performer nor a laggard, but a representative mid-tier option from the Mobility HD 4800 generation.