NVIDIA RTX A4000H

The NVIDIA RTX A4000H is a workstation graphics card built on the Ampere architecture, using the GA104 chip fabricated by Samsung on an 8 nm process. The die contains 17,400 million transistors across 392 mm², yielding a transistor density of 44.4 million per mm². Released on April 11, 2021, the card now holds end-of-life status. In the database's overall GPU ranking, it sits at the 50th percentile, a position that signals balanced mid-pack performance rather than a class-leading or entry-level standing.

Benchmark Performance

The RTX A4000H's compute core consists of 6,144 shading units, 192 texture mapping units, and 96 raster output units. The base clock is 735 MHz, with a boost clock of 1560 MHz. These clocks produce a pixel rate of 149.8 GPixel/s and a texture rate of 299.5 GTexel/s. The FP32 throughput is 19.17 TFLOPS, and critically, the FP16 throughput is identical at 19.17 TFLOPS due to a 1:1 ratio. This means half-precision workloads run at the same speed as single-precision, a valuable trait for AI inference and scientific computing that use FP16 tensors.

The database lists no nearest rivals for this card, so direct percentage comparisons against competing GPUs are not available. Instead, the 50th percentile standing provides context: the A4000H is neither at the top nor the bottom of the GPU performance distribution. Its 19.17 TFLOPS of FP32 compute places it in a tier where professional rendering and simulation workloads are feasible, but it will not dominate the most demanding multi-GPU render farms.

The 8 nm process node and 44.4 million transistors per mm² density indicate a mature manufacturing process. The GA104 chip is a mid-sized Ampere die, and the 392 mm² area accommodates the 48 RT cores and 192 tensor cores alongside the standard shading units. The 1:1 FP16 ratio is a notable architectural decision, as many competing cards halve their FP16 throughput or require dedicated tensor paths to reach similar rates. The pixel rate of 149.8 GPixel/s and texture rate of 299.5 GTexel/s together describe a card that handles fill-rate-bound tasks with ease, while the compute figures point to balanced throughput across shading and tensor workloads.

Who Should Consider It

The 16 GB GDDR6 memory pool, paired with a 256-bit bus and 448.0 GB/s of bandwidth, makes the A4000H well-suited for high-resolution content creation. Users working with high-resolution textures, large CAD assemblies, or multi-layer compositing will find the 16 GB capacity sufficient for scenes that would exceed the VRAM of lower-capacity cards. The 448.0 GB/s bandwidth ensures that texture streaming and memory-bound compute kernels do not starve the 19.17 TFLOPS compute rate.

The 4x DisplayPort 1.4a outputs support up to four displays, which is ideal for digital content creation workstations that use a main monitor plus reference and tool panels. The PCIe 4.0 x16 interface provides ample bandwidth for data transfer, and the card's single-slot form factor allows multiple units to be installed in a single chassis for distributed rendering.

The 50th percentile ranking suggests that this card is appropriate for users who need professional-grade features — such as RT cores, tensor cores, and certified driver support — without requiring the absolute highest performance. It is a mid-range workstation solution. For users whose workloads are primarily compute-bound, the 19.17 TFLOPS FP32/FP16 performance is the relevant metric; for those who are memory-bound, the 448.0 GB/s bandwidth and 16 GB capacity will be the deciding factor. The 140 W TDP and single-slot design further make it a candidate for dense workstation builds where space and power are constrained.

Ray Tracing and Feature Set

The RTX A4000H includes 48 RT cores dedicated to ray-traced rendering, and 192 tensor cores that accelerate AI-based features like denoising and super-resolution. The Ampere architecture's RT cores provide hardware-accelerated ray tracing for applications that support it, such as architectural visualization and product design software. The tensor cores enable machine learning inference and training directly on the GPU, which is increasingly common in professional workflows.

The card supports DirectX 12 Ultimate (12_2), which includes features like variable rate shading and mesh shaders, as well as OpenGL 4.6 and Vulkan 1.4 for cross-platform compatibility. The 4x DisplayPort 1.4a outputs support high dynamic range and high refresh rate displays, and the 48 RT cores deliver a meaningful ray-tracing capability that was absent in the predecessor Quadro Turing generation's non-RT models. The combination of RT and tensor cores means the A4000H can handle hybrid rendering pipelines that mix rasterization, ray tracing, and AI denoising in a single frame. The 192 tensor cores are particularly relevant for real-time denoising, which is essential for interactive ray-traced workflows.

FAQ

Q: What is the compute throughput of the RTX A4000H?

A: The card delivers 19.17 TFLOPS of FP32 and 19.17 TFLOPS of FP16, at a 1:1 ratio.

Q: How much VRAM does the RTX A4000H have?

A: It has 16 GB of GDDR6 memory on a 256-bit bus, with 448.0 GB/s of bandwidth.

Q: What power supply is recommended for the RTX A4000H?

A: The suggested PSU is 300 W, and the card draws power through a single 6-pin connector.

Q: Does the RTX A4000H support ray tracing?

A: Yes, it has 48 RT cores and 192 tensor cores, and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: When was the RTX A4000H released?

A: It was released on April 11, 2021, and is now end-of-life.

Q: What display outputs does the RTX A4000H offer?

A: It has 4x DisplayPort 1.4a outputs, supporting multi-display configurations.

How It Compares

The FACT PACK provides no nearest rivals for the RTX A4000H, so a numeric comparison against specific competing cards is not possible. The 50th percentile standing in the database indicates that the card occupies the middle of the GPU performance range. Its predecessor, the Quadro Turing generation, did not include the RT and tensor core configuration found in this Ampere card, so the A4000H represents a generational feature leap. The successor, Workstation Ada, is the next step up in NVIDIA's workstation lineup, offering higher performance, but the A4000H remains a relevant option for users who want Ampere's feature set at a 140 W TDP.

The end-of-life status means the card is no longer in active production, but the 50th percentile ranking shows that it retains a place in the performance hierarchy. Users comparing it to other cards should rely on the compute and memory specifications listed here, as the database does not include rival benchmark scores for this product. The card's position between the Quadro Turing and Workstation Ada generations makes it a bridge product that introduced RT and tensor core capabilities to the workstation segment at a mid-range performance level.

Memory Subsystem

The RTX A4000H is equipped with 16 GB of GDDR6 memory, connected through a 256-bit interface. The memory operates at 1750 MHz, which yields an effective data rate of 14 Gbps and a total bandwidth of 448.0 GB/s. This configuration is well-balanced for the card's compute capabilities: the 19.17 TFLOPS FP32 rate can be fed by the memory bandwidth without creating a significant bottleneck in most workloads.

For high-resolution rendering, the 16 GB capacity is the more important specification. Scenes with high-resolution textures, complex geometry, or large simulation grids can exceed the VRAM of smaller cards, and the A4000H's 16 GB allows such scenes to fit entirely in memory, avoiding costly PCIe transfers. The 256-bit bus width is a middle-ground design; narrower bus widths would reduce the bandwidth proportionally, while wider bus widths are reserved for higher-end cards. The 448.0 GB/s figure is sufficient for high-resolution texture streaming and moderate compute tasks, though users who push extreme-resolution textures or massive point clouds may find the bandwidth limiting. The GDDR6 type is a mature technology, and the 14 Gbps effective speed is a standard configuration for this class of card.

Power and Cooling

The RTX A4000H has a TDP of 140 W, a modest figure for a card with 19.17 TFLOPS of compute performance. NVIDIA recommends a 300 W power supply, and the card requires a single 6-pin power connector. The single-slot design, measuring 241 mm in length and 112 mm in height, allows it to fit in compact workstation chassis and enables dense multi-GPU configurations. The 140 W TDP means the cooling solution can be relatively simple, and the card's dimensions ensure it does not obstruct adjacent slots. Users with existing power supplies that have a spare 6-pin connector will not need to upgrade, provided their PSU meets the 300 W recommendation. The low power draw also contributes to lower system heat output, which is beneficial in multi-GPU towers. The single-slot form factor is a defining characteristic, as it permits the card to be installed in chassis that cannot accommodate dual-slot cooling solutions, making it a practical choice for high-density compute nodes.