ATI Radeon HD 4550

Launched in late September 2008 for AMD’s Radeon R700 generation, the ATI Radeon HD 4550 is a 55 nm TSMC-built chip with 242 million transistors on a 73 mm² die, placing it firmly in the entry-level segment of its era. With a 50th percentile ranking among all GPUs in the database and no active benchmark scores or nearest rivals recorded, its performance must be assessed from its raw specifications and architectural characteristics rather than direct comparisons.

Benchmark Performance

The ATI Radeon HD 4550’s compute capabilities are defined by 80 shading units, 8 texture mapping units, and 4 raster output units. The chip delivers a peak FP32 throughput of 96.00 GFLOPS, a pixel rate of 2.400 GPixel/s, and a texture rate of 4.800 GTexel/s. These figures place the card at the very bottom of the performance spectrum for discrete GPUs of its generation — the data shows a card designed for basic desktop acceleration, not for frame-rate-sensitive gaming. The 50th percentile rank is misleading in this context because the database includes integrated and legacy parts; among dedicated Radeon cards from 2008, the HD 4550 sits near the low end. There are no nearest rivals with deltaPct values to cite, so the analysis relies on absolute numbers: 96.00 GFLOPS is roughly an order of magnitude below what a mid-range card of that era would produce, though no rival figures are available in the pack for exact comparison. The 4.800 GTexel/s texture rate means that even at 720p, modern or contemporary games would see heavy texture-loading stalls, while the 2.400 GPixel/s pixel rate caps fill-rate-heavy effects like shadows and post-processing. In practical terms, benchmark results for this card would show playable frame rates only for titles from before its release, and even then at low resolutions and detail settings.

Power and Cooling

The HD 4550 has a thermal design power of just 25 W, which is remarkably low for any discrete GPU, even in 2008. This TDP means the card requires no auxiliary power connectors — the FACT PACK lists “None” for power connectors — and a suggested PSU of 200 W is sufficient for a full system containing this card. The single-slot cooling solution is adequate given the 25 W heat output; the card’s physical length is 168 mm (6.6 inches), making it compatible with nearly all cases from that period. Power consumption is so modest that passive cooling would have been feasible, but the reference design uses a small fan. The lack of any power connector simplifies installation in pre-built systems with weak power supplies, and the 25 W figure means the card draws less power than many CPUs of the same era. For a database perspective, the 200 W suggested PSU is a floor, not a recommendation for headroom — any modern system would exceed that solely with a CPU and motherboard, but the HD 4550’s own draw remains negligible. The PCIe 2.0 x16 bus interface provides ample bandwidth for the card’s 10.48 GB/s memory throughput, and the slot itself can deliver up to 75 W, so the card never approaches the interface’s limits.

Memory Subsystem

The HD 4550 is equipped with 256 MB of DDR2 memory on a 64-bit bus, yielding a bandwidth of 10.48 GB/s. The memory clock runs at 655 MHz, which translates to 1310 Mbps effective due to DDR2’s double-data-rate nature. This memory configuration is the card’s most severe bottleneck. A 64-bit bus is half the width of even low-end mainstream cards of the time, and 10.48 GB/s is insufficient for high-resolution textures or anti-aliasing. At 1920x1080, a 256 MB frame buffer cannot hold both the color buffer and depth buffer for modern games, forcing constant spillover to system memory via the PCIe bus — a process that destroys frame pacing. The bandwidth limitation is particularly acute for memory-intensive operations like anisotropic filtering and large texture sets; the 10.48 GB/s figure means that even if the GPU cores could process more, the memory subsystem would starve them. For high resolutions (above 1600x900), the data indicates the card would struggle to maintain playable frame rates even in older titles, because the frame buffer size and bandwidth are co-limiting. The DDR2 type, rather than faster GDDR3 or GDDR5, further compounds latency issues. In essence, the memory subsystem is adequate for a 2D desktop or video playback at 1080p, but any 3D workload that requires more than 256 MB of textures will see severe stuttering.

Who Should Consider It

Given the specifications, the HD 4550 is not a gaming card by any modern or even 2008 mainstream standard. Its 96.00 GFLOPS of compute and 10.48 GB/s bandwidth suggest that it targets users who need a discrete GPU for multi-monitor output or hardware video decode, not for 3D acceleration. The card’s display outputs — 1x DVI, 1x HDMI 1.3a, and 1x DisplayPort 1.0 — indicate a focus on HTPC use, where the low 25 W TDP and silent single-slot cooler are advantages. For resolutions of 1366x768 or lower, and for games released before 2006 with reduced detail settings, the card might achieve 30 FPS in some titles, but no benchmark data exists to confirm this. The 50th percentile rank suggests that among all GPUs in the database, half are slower — which includes many integrated solutions — so the HD 4550 is not the absolute worst, but it is far outclassed by any discrete card from the following two generations. Users considering this card today should only do so for legacy systems requiring a specific output port, as the 256 MB VRAM makes even 720p gaming with modern textures impossible. The 2.400 GPixel/s fill rate is enough for a basic desktop at 4K, but 3D applications will be limited to esports titles from a decade ago at lowest settings.

Ray Tracing and Feature Set

The HD 4550 does not include any dedicated ray tracing cores or tensor cores — those are features of much later architectures. The chip is built on the TeraScale architecture, which supports DirectX 10.1 (specifically the 10_1 feature level) and OpenGL 3.3. There is no Vulkan support listed. The absence of ray tracing hardware means that any ray-traced effects in games are entirely software-based, which would be impractically slow given the 96.00 GFLOPS FP32 throughput. The DirectX 10.1 support is a minor step above the base DirectX 10, adding features like improved texture sampling and blending modes, but it does not include DirectX 11 features like tessellation or compute shaders. OpenGL 3.3 support is similarly dated, lacking the modern pipeline features found in later versions. The card’s feature set is therefore minimal: no hardware-accelerated ray tracing, no tensor-based AI upscaling, and no modern API compatibility beyond OpenGL 3.3. The HDMI 1.3a output supports 1080p video at 60 Hz, and the DisplayPort 1.0 output allows for higher resolutions if the display supports it, but the GPU’s compute capabilities would not be used for any rendering beyond basic UI. For HTPC users, the card supports hardware video decode for formats of its era, though the FACT PACK does not specify which codecs. The lack of Vulkan support means no modern cross-platform graphics API, and the DirectX 10.1 limit excludes many games from 2009 onward that require DirectX 11. In summary, the HD 4550’s feature set is frozen in 2008, with no path to modern graphics features. Its only notable capabilities are low power draw (25 W) and a trio of display outputs that cover DVI, HDMI, and DisplayPort — a configuration that was ahead of its time for multi-monitor setups but utterly lacking in 3D acceleration headroom.