AMD Radeon RX 7400 OEM vs NVIDIA L20 Comparison

FAQ

Q: What are the core architectural differences between the AMD Radeon RX 7400 OEM and the NVIDIA L20?

A: The AMD Radeon RX 7400 OEM uses the RDNA 3.0 architecture with the Navi 33 chip on a 6 nm TSMC process, while the NVIDIA L20 uses Ada Lovelace with the AD102 chip on a 5 nm TSMC process. The L20 has 76,300 million transistors on a 609 mm² die, versus 13,300 million transistors on a 204 mm² die for the RX 7400 OEM.

Q: How do the memory configurations compare?

A: The NVIDIA L20 has 48 GB of GDDR6 memory on a 384-bit bus with 864.0 GB/s bandwidth. The AMD Radeon RX 7400 OEM has 8 GB of GDDR6 on a 128-bit bus with 172.8 GB/s bandwidth. The L20's memory bandwidth is 5x higher.

Q: Which card has higher compute throughput?

A: The NVIDIA L20 delivers 59.35 TFLOPS FP32 and FP16 (1:1), while the AMD Radeon RX 7400 OEM delivers 7.885 TFLOPS FP32 and FP16 (1:1). The L20 provides roughly 7.5x the raw floating-point throughput.

Q: What do the benchmark scores show?

A: The database records an average benchmark score of 251,147 for the NVIDIA L20, placing it in the 99th percentile of all GPUs. The AMD Radeon RX 7400 OEM has no recorded benchmark scores and sits in the 50th percentile.

Q: What are the power requirements for each card?

A: The AMD Radeon RX 7400 OEM has a 55 W TDP with a suggested 250 W PSU and a single 6-pin connector. The NVIDIA L20 has a 275 W TDP with a suggested 600 W PSU and a single 16-pin connector.

Q: How do the physical designs differ?

A: The AMD Radeon RX 7400 OEM is a single-slot card measuring 167 mm (6.6 inches) in length. The NVIDIA L20 is a dual-slot card measuring 267 mm (10.5 inches) in length and 111 mm (4.4 inches) in height.

Where Each One Wins

The NVIDIA L20 dominates in every measured performance category. Its 59.35 TFLOPS FP32 throughput positions it for compute-heavy workloads, and its 48 GB memory capacity with 864.0 GB/s bandwidth supports large data sets that exceed the RX 7400 OEM's 8 GB frame buffer. The L20 also carries 368 tensor cores, which the RX 7400 OEM lacks entirely, giving it a decisive advantage in AI inference and training tasks. Its 92 RT cores versus 28 on the RX 7400 OEM further widen the gap in ray-traced rendering.

The AMD Radeon RX 7400 OEM wins on efficiency and footprint. Its 55 W TDP demands far less power than the L20's 275 W TDP, and its single-slot, 167 mm length makes it suitable for compact or low-power systems. The RX 7400 OEM also offers newer display outputs with 1x HDMI 2.1a and 3x DisplayPort 2.1, whereas the L20 provides 4x DisplayPort 1.4a. For workloads that fit within 8 GB of memory and do not require tensor acceleration, the RX 7400 OEM uses substantially less system power and space.

The L20's 99th percentile ranking among all GPUs, against the RX 7400 OEM's 50th percentile, reflects a product aimed at server and professional acceleration rather than general desktop use. The RX 7400 OEM targets basic rendering and compute tasks where its low power draw and small size are priorities.

Architecture Differences

The two GPUs come from different architectural lineages. The AMD Radeon RX 7400 OEM uses RDNA 3.0, the latest iteration in AMD's gaming-focused architecture line, built on a 6 nm TSMC process. The NVIDIA L20 uses Ada Lovelace, NVIDIA's server-oriented architecture, built on a 5 nm TSMC process. The process difference contributes to the L20's higher transistor density of 125.3M per mm², compared to 65.2M per mm² for the RX 7400 OEM.

The compute pipelines diverge significantly. The RX 7400 OEM has 1,792 shading units, 112 texture mapping units, and 64 ROPs. The L20 has 11,776 shading units, 368 TMUs, and 128 ROPs. The L20 also integrates 368 tensor cores, a feature absent from the RX 7400 OEM, and 92 RT cores versus 28. These differences translate into the L20's pixel rate of 322.6 GPixel/s and texture rate of 927.4 GTexel/s, both far above the RX 7400 OEM's 70.40 GPixel/s and 123.2 GTexel/s.

Memory architecture also differs. The RX 7400 OEM uses a 128-bit bus with 8 GB GDDR6, while the L20 uses a 384-bit bus with 48 GB GDDR6. The L20's memory clock runs at 2250 MHz (18 Gbps effective), producing 864.0 GB/s bandwidth; the RX 7400 OEM's memory clock is 1350 MHz (10.8 Gbps effective), yielding 172.8 GB/s. Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The RX 7400 OEM belongs to the Navi III (RX 7000) generation with the codename Hotpink Bonefish, succeeding Navi II and preceding Navi IV. The L20 belongs to the Server Ada (Lxx) generation, succeeding Server Ampere and preceding Server Hopper. The L20's production status is listed as Active, while the RX 7400 OEM has no recorded production status.

Specification Differences

The recorded data shows these key specification differences:

• Process node: 6 nm (RX 7400 OEM) versus 5 nm (L20)
• Transistors: 13,300 million versus 76,300 million
• Die size: 204 mm² versus 609 mm²
• Transistor density: 65.2M / mm² versus 125.3M / mm²
• Base clock: 330 MHz versus 1440 MHz
• Boost clock: 1100 MHz versus 2520 MHz
• Memory clock: 1350 MHz (10.8 Gbps effective) versus 2250 MHz (18 Gbps effective)
• Memory size: 8 GB versus 48 GB
• Memory bus: 128 bit versus 384 bit
• Memory bandwidth: 172.8 GB/s versus 864.0 GB/s
• Shading units: 1,792 versus 11,776
• TMUs: 112 versus 368
• ROPs: 64 versus 128
• RT cores: 28 versus 92
• Tensor cores: none versus 368
• Pixel rate: 70.40 GPixel/s versus 322.6 GPixel/s
• Texture rate: 123.2 GTexel/s versus 927.4 GTexel/s
• FP32: 7.885 TFLOPS versus 59.35 TFLOPS
• FP16: 7.885 TFLOPS (1:1) versus 59.35 TFLOPS (1:1)
• TDP: 55 W versus 275 W
• Slot width: Single-slot versus Dual-slot
• Power connectors: 1x 6-pin versus 1x 16-pin
• Suggested PSU: 250 W versus 600 W
• Bus interface: PCIe 4.0 x8 versus PCIe 4.0 x16
• Display outputs: 1x HDMI 2.1a, 3x DisplayPort 2.1 versus 4x DisplayPort 1.4a
• Dimensions: 167 mm length versus 267 mm length, 111 mm height
• Release date: 2025-08-07 versus 2023-11-15

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Radeon RX 7400 OEM and the NVIDIA L20. The RX 7400 OEM has no recorded benchmark scores, while the L20 has two: 274,276 in Geekbench OpenCL and 228,018 in Geekbench Vulkan. The L20's average benchmark score of 251,147 places it in the 99th percentile of all GPUs.

The L20's closest rivals, according to the database, illustrate its performance tier. It sits 11.6% above the NVIDIA PG506-232 (average score 225,124) and 14.2% above the AMD Radeon PRO W7900D (average score 219,827). It trails the NVIDIA L40 by 11.6% (average score 284,111) and the NVIDIA RTX 6000 Ada Generation by 12.6% (average score 287,237).

The RX 7400 OEM's 50th percentile ranking places it in the middle of the database's GPU distribution, but without benchmark scores, its exact position relative to the L20 cannot be quantified. The specification data, however, shows a large gulf. The L20 delivers 7.5x the FP32 throughput, 5x the memory bandwidth, and 6x the memory capacity. Its shading unit count is 6.6x higher, and its pixel rate is 4.6x higher.

The clock speed difference is also notable. The L20's base clock of 1440 MHz and boost clock of 2520 MHz far exceed the RX 7400 OEM's 330 MHz base and 1100 MHz boost. These clocks, combined with the larger chip and wider memory bus, explain the L20's commanding lead in raw throughput metrics.

For workloads that depend on tensor cores, the L20 has no competition from the RX 7400 OEM, which lacks the feature entirely. The L20's 368 tensor cores make it suitable for AI and machine learning tasks, while the RX 7400 OEM's feature set is limited to conventional rasterization and compute.

The RX 7400 OEM does hold advantages in power efficiency and physical footprint. Its 55 W TDP is one-fifth of the L20's 275 W, and its single-slot design at 167 mm length is far more compact than the L20's dual-slot 267 mm length. The RX 7400 OEM also supports newer display interfaces, including HDMI 2.1a and DisplayPort 2.1, compared to the L20's DisplayPort 1.4a outputs.

The release timeline also separates the two. The RX 7400 OEM launched on 2025-08-07, while the L20 launched on 2023-11-15. The L20's predecessor and successor are listed as Server Ampere and Server Hopper, respectively, while the RX 7400 OEM's are Navi II and Navi IV. These lineage details confirm that the two cards target different segments: the L20 is a server accelerator, and the RX 7400 OEM is an OEM desktop part.