ATI Radeon HD 4650

The ATI Radeon HD 4650 is a 55 nm TeraScale architecture part from AMD, built on the RV730 chip with 514 million transistors on a 146 mm² die. It is positioned in the 50th percentile of all GPUs in the database, indicating it sits exactly at the median of the performance distribution. With a pixel rate of 4.800 GPixel/s, a texture rate of 19.20 GTexel/s, and 384.0 GFLOPS of FP32 compute, this card is a legacy entry-level solution, now marked as end-of-life.

Benchmark Performance

The ATI Radeon HD 4650 has an average benchmark score of 0, and the nearestRivals array is empty, meaning there is no direct comparative data available in the current database. Consequently, the analysis must rely on its absolute specifications. The card's 384.0 GFLOPS FP32 throughput and 19.20 GTexel/s texture fill rate indicate a design optimized for 720p gaming at modest settings in its era. The 50th percentile ranking places it at the exact midpoint of all GPUs ever benchmarked, which is a surprisingly high standing for a card of this vintage; this suggests that the database contains a substantial number of lower-performing integrated or older discrete solutions. The pixel rate of 4.800 GPixel/s, derived from 8 ROPs, is a bottleneck for higher resolutions, as it limits the card’s ability to fill large framebuffers quickly. In practical terms, the data shows that the HD 4650 is not competitive with any modern discrete GPU, but its median percentile implies it outperforms a significant portion of the legacy and integrated graphics landscape. The absence of nearestRivals means we cannot compute percentage deltas, so all comparisons must be qualitative or based on the absolute rates provided. The FP32 figure of 384.0 GFLOPS is the single most telling metric, as it directly governs shader-bound workloads, and it places the card firmly in the entry-level segment of its generation.

Memory Subsystem

The memory configuration consists of 256 MB of GDDR3, a capacity that was already considered minimal at the time of release for 1080p gaming. The memory bus is 128 bit wide, which is half the width of higher-tier cards of its generation, and it operates at a memory clock of 700 MHz, translating to 1400 Mbps effective. The resulting memory bandwidth is 22.40 GB/s. This bandwidth figure is the critical constraint for high-resolution performance; at 1080p, the 22.40 GB/s would be saturated quickly by modern textures and shader workloads, leading to severe frame pacing issues. For 720p and lower resolutions, the bandwidth is adequate for the era's games, but the 256 MB VRAM cap is a hard limit on texture detail and draw distance. The data indicates that this card is not suited for high-resolution gaming, as the combination of a 128-bit bus and 22.40 GB/s bandwidth is fundamentally insufficient for 1440p or 4K workloads, which require well over 100 GB/s. The 8 ROPs, paired with this memory subsystem, produce a pixel rate of 4.800 GPixel/s, meaning that even if the shader units could process more data, the memory interface would throttle output. For users considering this card today, the 256 MB VRAM is the primary disqualifier for any modern title, regardless of settings.

Power and Cooling

The thermal design power is 48 W, which is remarkably low by modern standards and reflects the 55 nm process node. This low TDP means the card requires no auxiliary power connectors; the powerConnectors field is listed as "None," and the suggested PSU is a 200 W unit. The slot width is single-slot, and the physical dimensions are 193 mm in length, or 7.6 inches, making it a compact card that can fit in most small form factor cases. The absence of power connectors simplifies installation, as any standard 200 W power supply with a PCIe 2.0 x16 slot can run it. The 48 W TDP also implies that a passive or low-profile cooling solution is feasible, though the database does not specify the cooler type. The PCIe 2.0 x16 bus interface is backward compatible with modern motherboards, but the card’s display outputs—2x DVI and 1x S-Video—are dated, lacking HDMI or DisplayPort natively. For a system with a 200 W PSU, this card is a safe drop-in upgrade, but the power delivery is so minimal that it generates very little heat, meaning the cooling solution is rarely stressed. The data suggests that this is a card for legacy systems with limited power budgets, not for performance builds.

How It Compares

Without nearestRivals data, the comparison must be framed against its own specifications and historical context. The card’s successor, Evergreen, is listed but no scores are provided. Its predecessor, Radeon R600, is also listed without benchmarks. Thus, we can only infer performance relative to its own metrics.

vs. Radeon R600 (Predecessor): The R600 series was built on an older architecture and process. The HD 4650, using the RV730 chip, has 320 shading units, which is a higher count than the entry-level R600 parts, but the R600’s higher-end models had more memory bandwidth. The HD 4650’s 22.40 GB/s bandwidth is modest, but its 384.0 GFLOPS FP32 suggests a better shader efficiency per watt. The 48 W TDP is a significant improvement, as R600 parts were known for higher power draw. The data indicates the HD 4650 is a more refined, power-efficient design, but without benchmark scores, a direct performance delta cannot be quantified.

vs. Evergreen (Successor): The Evergreen generation moved to a newer architecture with improved tessellation and DirectX 11 support. The HD 4650 only supports DirectX 10.1 (10_1) and OpenGL 3.3. Evergreen parts generally offered higher FP32 compute and more memory bandwidth, but the HD 4650’s 50th percentile ranking suggests it holds its own against the lower end of that lineup. The 256 MB VRAM is a clear disadvantage against Evergreen’s typical 512 MB or 1 GB options. Without specific scores, the analysis is limited to noting the architectural generational leap, with the HD 4650 being a legacy part that predates several key API features.

vs. Modern Integrated Graphics: While not listed as a rival, modern iGPUs often exceed the HD 4650’s raw compute. The 384.0 GFLOPS figure is lower than many current integrated solutions, and the 22.40 GB/s bandwidth is a fraction of what modern LPDDR5X system memory can provide. The HD 4650’s only advantage is its dedicated VRAM, but at 256 MB, that advantage is negligible. The 50th percentile is likely skewed by the inclusion of very old or low-end GPUs in the database. The card is functionally obsolete for any contemporary workload.

Who Should Consider It

The data suggests that the ATI Radeon HD 4650 is a card for retro computing or basic display output, not for gaming. At 720p with low settings, the 384.0 GFLOPS compute and 19.20 GTexel/s texture rate could handle games from its 2008 release window, but the 256 MB VRAM and 22.40 GB/s bandwidth will cause stuttering in any title with large textures. For 1080p, the 4.800 GPixel/s pixel rate is insufficient, and the card will likely produce sub-30 FPS frame rates in most 3D applications. The 48 W TDP and 200 W PSU requirement make it an ideal candidate for a low-power home server or a legacy Windows XP gaming rig, where its DirectX 10.1 support is acceptable. The card’s display outputs of 2x DVI and 1x S-Video limit modern monitor connectivity, necessitating adapters. Users seeking a card for office productivity or 2D desktop workloads will find it adequate, but any 3D acceleration beyond basic Windows Aero effects is not recommended. Given its end-of-life status and the lack of Vulkan support, it is not viable for modern Linux or Windows 10/11 gaming. The 50th percentile rank is misleading; it reflects the database’s composition, not the card’s real-world usability. In essence, this is a collector’s item or a display adapter for a retro build, where its 55 nm process and 514 million transistors are points of historical interest rather than performance. The absence of any benchmark scores in the database reinforces that it is not a card that users should consider for any current workload.