AMD Radeon PRO W7900 vs NVIDIA L20 Comparison

Head-to-Head Benchmarks

The benchmark data presents a stark contrast between these two workstation cards. In the Geekbench OpenCL test, the NVIDIA L20 records a score of 274,276, while the AMD Radeon PRO W7900 manages 84,379. That is a 225.1% advantage for the NVIDIA card, a decisive margin that dwarfs any other comparison in this matchup. The Vulkan test tells a similar but less extreme story: the L20 scores 228,018 against the W7900's 137,070, a 66.4% lead for NVIDIA. Both tests, then, go to the L20, giving it a clean 2-0 sweep in head-to-head wins.

What makes the OpenCL result particularly striking is the consistency of the gap. A 225.1% delta is not a close call; it suggests fundamental differences in how these architectures handle compute workloads. The Vulkan delta, while still substantial, is more than three times smaller in percentage terms, hinting that the gap narrows when the workload shifts toward graphics-oriented APIs. Still, the direction is unambiguous. The L20's average benchmark score across all recorded tests sits at 251,147, placing it in the 99th percentile of all GPUs in the database. The W7900's average is 110,725, which lands it in the 94th percentile. Both are high performers relative to the broader GPU landscape, but the L20 operates in a different tier entirely.

The nearest rival data reinforces the L20's standing. Its closest competitor is the NVIDIA L40, which averages 284,111, a 11.6% higher score than the L20. The RTX 6000 Ada Generation is even further ahead at 287,237, a 12.6% delta. Below the L20, the NVIDIA PG506-232 trails by 11.6% with an average of 225,124, and the AMD Radeon PRO W7900D sits 14.2% behind at 219,827. The L20, then, occupies a middle-high position among its peers, clearly above the W7900 family but not the top of the NVIDIA stack.

For the W7900, the rival picture is more crowded and less flattering. Its nearest rival is the NVIDIA Tesla V100 SXM2 16 GB at 114,395, which beats it by 3.2%. The RTX A5500 Mobile is 2.8% ahead at 113,944. The AMD Radeon Pro Vega II is essentially tied, scoring 109,617, a 1% delta in the W7900's favor. The AMD Radeon Pro W6600X trails by 3.2% at 107,342. These are narrow margins in every direction, indicating that the W7900's performance profile is closely clustered with hardware from previous generations and mobile parts. It is not a runaway leader in its own peer group, and it is far behind the L20 in direct comparison.

Architecture Differences

The underlying hardware tells a story that helps explain the benchmark results. The NVIDIA L20 uses the AD102 chip, built on the Ada Lovelace architecture, fabricated on a 5 nm process at TSMC. The die contains 76,300 million transistors across a 609 mm² area, yielding a transistor density of 125.3 million per square millimeter. The AMD Radeon PRO W7900, by contrast, uses the Navi 31 chip with the RDNA 3.0 architecture, also on TSMC's 5 nm node. Its die is smaller at 529 mm² and holds 57,700 million transistors, for a density of 109.1 million per square millimeter. The NVIDIA chip is physically larger, denser, and packs considerably more transistors, which aligns with its compute dominance in the recorded benchmarks.

The compute configurations diverge sharply. The L20 carries 11,776 shading units, 368 texture mapping units, and 128 render output units. The W7900 has 6,144 shading units, 384 TMUs, and 192 ROPs. The NVIDIA card has nearly double the shading units, while AMD counters with more TMUs and ROPs. The floating-point figures reflect this split: the L20 delivers 59.35 TFLOPS in FP32, while the W7900 reaches 61.32 TFLOPS. Both cards achieve a 1:1 ratio for FP16, with the L20 at 59.35 TFLOPS and the W7900 at 61.32 TFLOPS. The AMD card actually has a slight raw throughput edge in these metrics, yet it loses decisively in the benchmark scores. This suggests that raw FLOPS do not translate directly into application performance, or that the L20's other resources, such as its 368 tensor cores, provide advantages that synthetic benchmarks capture.

Ray tracing hardware is present on both. The L20 includes 92 RT cores, while the W7900 has 96. The AMD card has four more RT cores, but no tensor cores at all, a feature that is unique to the NVIDIA side. The absence of tensor cores on the W7900 is notable for any workload that relies on AI acceleration or DLSS-style processing. The pixel and texture rates also differ substantially: the L20 records 322.6 GPixel/s and 927.4 GTexel/s, while the W7900 achieves 479.0 GPixel/s and 958.1 GTexel/s. The AMD card is faster in rasterization-focused metrics despite its higher ROP count, but again, the benchmark outcomes favor NVIDIA.

Memory configurations are identical on paper. Both cards feature 48 GB of GDDR6 memory on a 384 bit bus, with 864.0 GB/s of bandwidth and an effective speed of 18 Gbps memory clocked at 2250 MHz. Neither card uses a more advanced memory type, so the memory subsystem cannot explain the performance gap. The L20 board power draw is listed at 275 W with a dual-slot design, whereas the W7900 draws 295 W and occupies a triple-slot form factor. The power connector layout differs as well: the L20 uses a single 16-pin connector, while the W7900 requires two 8-pin connectors. Both recommend a 600 W power supply.

The Verdict

The data points to a clear winner for compute-heavy workloads. The NVIDIA L20 outperforms the AMD Radeon PRO W7900 by 225.1% in OpenCL and 66.4% in Vulkan, and it sits in the 99th percentile of all GPUs compared to the W7900's 94th. For anyone prioritizing raw benchmark performance, the L20 is the obvious choice from these numbers. The W7900's launch MSRP is listed as 3,999 USD, which can be stated as a reference point, but the performance differential is so large that it dominates any other consideration.

The W7900 is not without its strengths, though they are relative. It has a higher FP32 throughput at 61.32 TFLOPS versus 59.35 TFLOPS, more ROPs at 192 versus 128, and more RT cores at 96 versus 92. These are real hardware advantages, but they do not show up in the recorded benchmark results. The L20's shading unit count and tensor core presence appear to matter more in practice. The verdict, strictly from the recorded data, is that the L20 wins this matchup decisively, and the W7900's role is best suited to scenarios where its specific features, such as DisplayPort 2.1 outputs or its particular form factor, are required.

Specification Differences

Several specification fields separate these two cards. The L20 uses the AD102 chip with Ada Lovelace architecture, while the W7900 uses Navi 31 with RDNA 3.0. The L20 has a larger die at 609 mm² versus 529 mm², and more transistors at 76,300 million versus 57,700 million, with a higher density of 125.3M per mm² compared to 109.1M per mm². The base clocks differ: the L20 runs at 1440 MHz, the W7900 at 1760 MHz. Boost clocks are closer, 2520 MHz for the L20 and 2495 MHz for the W7900. The L20 has 11,776 shading units, 368 TMUs, and 128 ROPs, while the W7900 has 6,144 shading units, 384 TMUs, and 192 ROPs. The RT core counts are 92 for the L20 and 96 for the W7900, and the L20 adds 368 tensor cores that the W7900 lacks entirely. Pixel rate favors the W7900 at 479.0 GPixel/s versus 322.6 GPixel/s, as does texture rate at 958.1 GTexel/s versus 927.4 GTexel/s. FP32 and FP16 both favor the W7900 at 61.32 TFLOPS versus 59.35 TFLOPS. The L20 draws 275 W in a dual-slot design with a 1x 16-pin connector; the W7900 draws 295 W in a triple-slot design with 2x 8-pin connectors. The L20 measures 267 mm in length, the W7900 is 280 mm. The L20 has 4x DisplayPort 1.4a outputs, while the W7900 has 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1. The L20 was released on 2023-11-15, the W7900 on 2023-05-25.

FAQ

Q: Which card has the higher average benchmark score?

A: The NVIDIA L20 has an average benchmark score of 251,147, which is more than double the AMD Radeon PRO W7900's average of 110,725.

Q: How large is the performance gap in the OpenCL test?

A: The NVIDIA L20 scores 274,276 in Geekbench OpenCL, while the AMD Radeon PRO W7900 scores 84,379. The L20 leads by 225.1%.

Q: Does the AMD card have any raw compute advantage?

A: Yes, the W7900 has higher FP32 and FP16 throughput at 61.32 TFLOPS compared to the L20's 59.35 TFLOPS, and it also has more ROPs and RT cores.

Q: Do both cards use the same memory configuration?

A: Yes, both have 48 GB of GDDR6 memory on a 384 bit bus with 864.0 GB/s bandwidth.

Q: What are the percentile rankings for each card?

A: The NVIDIA L20 is in the 99th percentile of all GPUs, while the AMD Radeon PRO W7900 is in the 94th percentile.

Q: Which card has tensor cores?

A: The NVIDIA L20 includes 368 tensor cores, while the AMD Radeon PRO W7900 has no tensor cores listed.

Where Each One Wins

The NVIDIA L20 wins in every recorded benchmark comparison. Its OpenCL score of 274,276 and Vulkan score of 228,018 both exceed the W7900's 84,379 and 137,070 respectively. The L20 also wins on transistor count, die size, shading units, and it is the only card with tensor cores. Its 99th percentile ranking places it among the top GPUs in the database. For compute-heavy tasks that benefit from shading unit parallelism and AI acceleration, the L20 is the clear pick.

The AMD Radeon PRO W7900 wins on several specification-level metrics, even if not on benchmarks. It has a higher FP32 throughput of 61.32 TFLOPS, a higher pixel rate of 479.0 GPixel/s, a higher texture rate of 958.1 GTexel/s, more ROPs, more TMUs, and more RT cores. It also supports DisplayPort 2.1 outputs, which the L20 does not offer. The W7900's 94th percentile ranking is still strong, and its nearest rival data shows it is competitive within a tight cluster of older and mobile GPUs. For tasks that rely on rasterization throughput, ray tracing core count, or the specific display output capabilities, the W7900 has arguments in its favor. The benchmark data, however, does not reflect those advantages in the two recorded tests. The L20 wins the compute comparison outright, and the W7900's specification wins are matters of hardware configuration rather than measured performance.