AMD Radeon PRO W7400 vs NVIDIA L20 Comparison

Head-to-Head Benchmarks

The NVIDIA L20 and AMD Radeon PRO W7400 occupy vastly different tiers of the GPU spectrum, and the recorded benchmark data reflects that divide clearly. The L20 posts an average benchmark score of 251,147, placing it in the 99th percentile of all GPUs in the database. The W7400, by contrast, has no recorded benchmark entries and sits at the 50th percentile. That percentile gap alone indicates a chasm in raw compute capability, but the available data allows for more specific comparisons.

In the Geekbench OpenCL test, the L20 delivers a score of 274,276. Its Vulkan result is lower, at 228,018, but still substantial. Against its nearest rivals, the L20 outperforms the NVIDIA PG506-232 by 11.6 percent, with the PG506-232 averaging 225,124. It also beats the AMD Radeon PRO W7900D by 14.2 percent, which averages 219,827. However, the L20 trails the NVIDIA L40 by 11.6 percent, as the L40 averages 284,111, and it falls 12.6 percent behind the NVIDIA RTX 6000 Ada Generation, which averages 287,237. These deltas position the L20 as a strong mid-to-high-end compute card, clearly ahead of some professional rivals but not at the absolute top of the stack.

The W7400 has no benchmark scores recorded in the database, so direct head-to-head numbers between these two specific cards are unavailable. What the data does show is that the L20 operates in a performance class where its nearest competitors are all high-end professional accelerators, while the W7400 has no comparable entries. The absence of benchmark data for the W7400 means the only quantitative comparison possible is through the percentile rankings and the L20's rival deltas. The L20's 99th percentile rank versus the W7400's 50th percentile rank is the most direct statistical indicator available, and it suggests the L20 is in a different computational league entirely.

Architecture Differences

The two cards are built on fundamentally different architectures, nodes, and design philosophies. The AMD Radeon PRO W7400 uses the Navi 33 chip, built on RDNA 3.0 architecture with the codename Hotpink Bonefish. It belongs to the Radeon Pro Navi generation, specifically the Navi III Series. The NVIDIA L20 uses the AD102 chip, built on Ada Lovelace architecture and classified under the Server Ada generation. The L20's predecessor is listed as Server Ampere, and its successor is Server Hopper, indicating a clear lineage in NVIDIA's server accelerator line.

Manufacturing processes differ significantly. The W7400 is fabricated on a 6 nm process at TSMC, while the L20 uses a 5 nm process, also at TSMC. Transistor counts reveal the scale gap: the W7400 packs 13,300 million transistors on a 204 mm² die, yielding a transistor density of 65.2 million per square millimeter. The L20 contains 76,300 million transistors on a 609 mm² die, with a density of 125.3 million per square millimeter. The L20 therefore has roughly 5.7 times the transistor count and nearly double the transistor density.

Shader resources follow the same pattern. The W7400 has 1,792 shading units, 112 texture mapping units, 64 ROPs, and 28 ray tracing cores. It has no tensor cores. The L20 has 11,776 shading units, 368 TMUs, 128 ROPs, 92 ray tracing cores, and 368 tensor cores. The L20's ray tracing core count is more than triple that of the W7400, and the tensor core presence is a major architectural differentiator, as the W7400 lacks tensor hardware entirely.

Clock behavior also diverges. The W7400 has a base clock of 330 MHz and a boost clock of 1,100 MHz, while the L20 runs at 1,440 MHz base and 2,520 MHz boost. The L20's boost clock is more than double the W7400's, though the W7400's low clock speeds are likely tied to its extremely low power target. Memory clocks differ as well: the W7400 runs at 1,350 MHz with 10.8 Gbps effective, while the L20 runs at 2,250 MHz with 18 Gbps effective.

FAQ

Q: Which card has more memory and bandwidth?

A: The NVIDIA L20 has 48 GB of GDDR6 memory on a 384-bit bus, delivering 864.0 GB/s of bandwidth. The AMD Radeon PRO W7400 has 8 GB of GDDR6 on a 128-bit bus, delivering 172.8 GB/s. The L20 has six times the memory capacity and five times the bandwidth.

Q: How do the cards compare in raw FP32 compute?

A: The L20 delivers 59.35 TFLOPS of FP32 performance, while the W7400 delivers 7.885 TFLOPS. Both cards offer FP16 at a 1:1 ratio with their FP32 figures, meaning the L20 also delivers 59.35 TFLOPS FP16 and the W7400 delivers 7.885 TFLOPS FP16.

Q: What is the power consumption difference?

A: The W7400 has a TDP of 55 W and requires no power connectors, with a suggested PSU of 250 W. The L20 has a TDP of 275 W, uses a single 16-pin power connector, and requires a suggested PSU of 600 W.

Q: Do both cards support the same graphics APIs?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The W7400 uses DisplayPort 2.1 outputs, while the L20 uses DisplayPort 1.4a outputs, with both offering four display outputs.

Q: What is the physical size difference?

A: The W7400 is 168 mm long, 69 mm tall, and 20 mm wide, fitting a single-slot form factor. The L20 is 267 mm long and 111 mm tall, with no width listed, and occupies a dual-slot form factor.

Q: Which card has tensor cores?

A: Only the NVIDIA L20 has tensor cores, with 368 of them. The AMD W7400 has no tensor core hardware listed in its specifications.

Specification Differences

The two cards differ across nearly every specification category. The W7400 uses the Navi 33 chip on RDNA 3.0 architecture, while the L20 uses AD102 on Ada Lovelace. The process node is 6 nm for AMD and 5 nm for NVIDIA. Transistor count is 13,300 million versus 76,300 million. Die size is 204 mm² versus 609 mm². Transistor density is 65.2 million per mm² versus 125.3 million per mm².

Base clocks are 330 MHz versus 1,440 MHz. Boost clocks are 1,100 MHz versus 2,520 MHz. Memory clocks are 1,350 MHz with 10.8 Gbps effective versus 2,250 MHz with 18 Gbps effective. Memory size is 8 GB versus 48 GB. Memory type is GDDR6 for both, but bus width is 128-bit versus 384-bit. Bandwidth is 172.8 GB/s versus 864.0 GB/s.

Shading units are 1,792 versus 11,776. TMUs are 112 versus 368. ROPs are 64 versus 128. Ray tracing cores are 28 versus 92. Tensor cores are absent on the W7400 versus 368 on the L20. Pixel rate is 70.40 GPixel/s versus 322.6 GPixel/s. Texture rate is 123.2 GTexel/s versus 927.4 GTexel/s. FP32 and FP16 compute are 7.885 TFLOPS versus 59.35 TFLOPS.

Power figures are 55 W TDP versus 275 W TDP. Slot width is single-slot versus dual-slot. Power connectors are none versus one 16-pin. Suggested PSU is 250 W versus 600 W. Bus interface is PCIe 4.0 x8 versus PCIe 4.0 x16. Display outputs are DisplayPort 2.1 versus DisplayPort 1.4a. The W7400 measures 168 mm by 69 mm by 20 mm, while the L20 measures 267 mm by 111 mm with no width listed.

Release dates also differ, with the W7400 released in August 2025 and the L20 released in November 2023. The W7400's predecessor is the Radeon Pro Vega, while the L20's predecessor is Server Ampere and its successor is Server Hopper.

Where Each One Wins

The NVIDIA L20 wins decisively in every measurable compute category. Its FP32 output of 59.35 TFLOPS is roughly 7.5 times that of the W7400. Its 864.0 GB/s memory bandwidth is five times higher, and its 48 GB capacity dwarfs the W7400's 8 GB. The L20 also holds advantages in pixel rate, texture rate, shading units, ray tracing cores, and it is the only one of the two with tensor cores. Its 99th percentile ranking versus the W7400's 50th percentile reinforces that the L20 is built for heavy compute workloads, large model inference, or any task that demands substantial memory and parallel throughput. The L20's benchmark scores, 274,276 in OpenCL and 228,018 in Vulkan, confirm its ability to handle demanding general-purpose compute and graphics workloads.

The AMD Radeon PRO W7400 wins in efficiency and physical footprint. Its 55 W TDP requires no external power connectors and only a 250 W suggested PSU, compared to the L20's 275 W TDP, 16-pin connector, and 600 W suggested PSU. The W7400's single-slot, 168 mm length, 69 mm height, and 20 mm width design allows installation in compact chassis where the L20's dual-slot, 267 mm length, and 111 mm height would not fit. The W7400 also uses newer DisplayPort 2.1 outputs, which may be relevant for display-centric workflows, whereas the L20 uses DisplayPort 1.4a.

The use-case split is therefore clear. The L20 targets server or workstation environments where maximum compute, memory capacity, and bandwidth are paramount, and where power and space constraints are secondary. The W7400 targets low-power, space-constrained deployments that prioritize ease of integration and modest cooling requirements over raw performance. The data does not suggest any workload where the W7400 would outperform the L20 on pure performance, but it does establish the W7400 as a viable option for scenarios where the L20's power draw, size, or connector requirements are prohibitive.