NVIDIA GeForce FX 5950 Ultra

The NVIDIA GeForce FX 5950 Ultra represents the final and most refined expression of the GeForce FX generation, built on the NV38 chip. As an end-of-life product from late 2003, this card occupies a specific historical niche, targeting the absolute top end of the AGP 8x market with a 130 nm process from TSMC housing 135 million transistors on a 207 mm² die. While the benchmark database shows no synthetic scores for this specific SKU, its architectural specifications and physical characteristics define its standing, placing it at the 50th percentile among all GPUs tracked.

Benchmark Performance

The absence of direct benchmark scores in the database necessitates an analysis based on the card's raw throughput metrics, which are fully enumerated in the specification pack. The FX 5950 Ultra delivers a pixel rate of 1.900 GPixel/s and a texture rate of 3.800 GTexel/s, figures derived directly from its 8 texture mapping units and 4 ROPs operating in tandem. These numbers establish a clear performance ceiling for the architecture; the fillrate is the definitive measure of how the card handles early-2000s DirectX 9.0a workloads, where pixel shading and texture fetches dominated rendering pipelines.

The card's position at the 50th percentile of all GPUs is a telling indicator of its legacy status. This is not a score from a specific test but a historical ranking that places it exactly in the middle of the database's entire spectrum of hardware, from integrated graphics to modern flagships. For its era, the 3.800 GTexel/s texture rate was a formidable figure, enabling high-detail texture filtering at resolutions that were then considered demanding. However, the 4 ROPs present a significant bottleneck for fillrate-intensive effects like anti-aliasing and high-resolution framebuffer operations, meaning the card's theoretical peak is often unattainable in real-world scenarios that stress the backend of the pipeline.

Comparing the FX 5950 Ultra to its immediate predecessor, the GeForce 4 Ti, the architectural leap is substantial. The move to the Rankine architecture brought full support for DirectX 9.0a pixel shaders, a feature the GeForce 4 Ti lacked entirely. This means that while the older card could match or exceed the FX 5950 Ultra in pure fillrate-bound DirectX 8 titles, the FX 5950 Ultra pulls ahead decisively in any application utilizing shader model 2.0 features, making it the superior choice for contemporary software of its release period. The successor, GeForce 6 AGP, would later surpass it, but for the duration of its lifecycle, the FX 5950 Ultra was the pinnacle of NVIDIA's AGP offerings.

Power and Cooling

The FX 5950 Ultra carries a thermal design power of 74 W, a figure that dictates its cooling and power supply requirements. This TDP is modest by modern standards but was significant for the AGP era, necessitating a robust cooling solution. The card is specified as a dual-slot design, indicating a substantial heatsink and fan assembly that exhausts heat outside the chassis, a necessity given the high clock speeds and power draw of the NV38 core.

Power delivery is handled via a single Molex connector, a standard peripheral power plug of the time. This connector requirement is a critical installation consideration, as the card cannot draw sufficient power from the AGP 8x slot alone. The database recommends a 250 W power supply unit for systems incorporating this card, a figure that assumes a typical contemporary CPU and a modest number of peripherals. This PSU recommendation is not a peak requirement but a baseline for stable operation; users with high-end CPUs or multiple drives would require a more robust unit. The dual-slot cooler, while ensuring thermal stability, also occupies an adjacent expansion slot, a physical constraint that users must account for when planning their system layout. The card's physical dimensions are 229 mm in length and 111 mm in height, making it a substantial PCB that requires adequate clearance inside the case.

Ray Tracing and Feature Set

The FX 5950 Ultra predates the introduction of dedicated ray tracing and tensor cores by nearly two decades; the specification pack lists no RT cores and no tensor cores. Consequently, hardware-accelerated ray tracing is entirely absent from this architecture. The card's feature set is defined entirely by its fixed-function and programmable shader pipelines, which are governed by its API support.

The card supports DirectX 9.0a, which is the foundational API for its era. This version of DirectX introduced Pixel Shader 2.0 and Vertex Shader 2.0, enabling complex per-pixel lighting effects, procedural textures, and cinematic shaders that were impossible on older DirectX 8 hardware. The OpenGL support is listed as version 1.5 with full support and version 2.0 with partial support. This partial OpenGL 2.0 support is a notable caveat, as it means some advanced OpenGL features, such as certain framebuffer object operations or specific shader model capabilities, may be limited or implemented via extensions rather than the core specification. For games and applications of the period that relied heavily on OpenGL, this could result in compatibility quirks or reduced visual fidelity compared to DirectX 9.0a titles.

The absence of tensor cores also means no AI-accelerated features like DLSS (Deep Learning Super Sampling) are available. All anti-aliasing and resolution scaling must be performed using traditional rasterization techniques, placing the burden entirely on the 4 ROPs and the 30.40 GB/s of memory bandwidth. The feature set is thus firmly rooted in the early programmable shader era, offering no forward-looking hardware acceleration beyond its core 3D rendering capabilities.

How It Compares

The database lists no nearest rivals for this product, which is a significant data point in itself. This indicates that within the benchmark database's historical tracking, the FX 5950 Ultra has no direct contemporaries that have been benchmarked and compared alongside it. This is not to say it existed in a vacuum; rather, it means the quantitative comparison framework is absent.

Its predecessor, the GeForce 4 Ti, is the primary architectural comparison. The GeForce 4 Ti was a DirectX 8 part, and while it offered competitive fillrate performance, it lacked the programmable pixel shader capabilities of the Rankine architecture. The FX 5950 Ultra's advantage is not in raw speed but in feature support; it can run shader-heavy DirectX 9.0a code that the GeForce 4 Ti cannot execute at all. This is a qualitative leap, not a quantitative one, and it defines the upgrade rationale for users of that era.

The successor, GeForce 6 AGP, represents the next generation. The FX 5950 Ultra's 74 W TDP and dual-slot cooler were a response to the thermal challenges of the NV38 chip, while the GeForce 6 series would later achieve similar or better performance with more efficient architectures. The FX 5950 Ultra's 130 nm process and 135 million transistors were state-of-the-art for its release, but the architecture was known to struggle with high shader complexity, a weakness that the GeForce 6 series directly addressed. Without benchmark scores from rivals, the analysis must rely on these architectural facts to contextualize the card's position as a bridge between the fixed-function past and the programmable future.

Memory Subsystem

The memory subsystem of the FX 5950 Ultra is a critical component of its performance profile, comprising 256 MB of DDR memory operating at an effective 950 Mbps. This memory is organized across a 256-bit bus, yielding a total memory bandwidth of 30.40 GB/s. This bandwidth figure is essential for feeding the 8 TMUs and maintaining fillrate in texture-heavy scenes.

At the time of its release, 256 MB was a substantial amount of VRAM, enabling the card to hold large texture sets and framebuffers without resorting to memory swapping over the AGP bus. The 256-bit bus width is a high-end configuration, ensuring that the memory controller can transfer large amounts of data per clock cycle. The 30.40 GB/s bandwidth is well-matched to the card's pixel rate of 1.900 GPixel/s; a 32-bit color pixel at 1.9 billion pixels per second requires approximately 7.6 GB/s of bandwidth for the framebuffer alone, leaving ample headroom for texture reads and Z-buffer operations.

For high resolutions, the memory subsystem's capacity and bandwidth are the primary determinants of performance. At resolutions like 1600x1200 or higher, the framebuffer footprint grows significantly, and the 256 MB capacity prevents the card from running out of memory for standard game settings. However, enabling 4x anti-aliasing at such resolutions can consume a significant portion of the bandwidth, potentially creating a bottleneck at the 4 ROPs. The 30.40 GB/s figure is sufficient for the card's intended era of games, but it is not headroom for future titles; it is a tightly balanced specification that delivers peak performance only when all components—the 8 TMUs, 4 ROPs, and memory bus—operate in concert without exceeding their individual limits. The DDR memory type, while not as fast as later GDDR variants, was the standard for high-end cards of this period, and the 256-bit interface ensures that the memory clock of 475 MHz is utilized effectively to reach the listed bandwidth.