NVIDIA L4 vs NVIDIA RTX PRO 5000 Blackwell Comparison

The NVIDIA RTX PRO 5000 Blackwell and NVIDIA L4 represent two distinct tiers of professional acceleration, separated by architecture, physical scale, and compute capacity. The RTX PRO 5000 Blackwell is a dual-slot, 300 W workstation behemoth built on the GB202 chip with Blackwell 2.0 architecture, while the L4 is a single-slot, 72 W server accelerator using the AD104 chip with Ada Lovelace architecture. Benchmark data shows the RTX PRO 5000 Blackwell leads decisively in compute workloads, but the L4’s compact, low-power design serves a different deployment scenario. The following analysis draws exclusively from the provided specifications and benchmark results.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA RTX PRO 5000 Blackwell has an average benchmark score of 182,109, placing it in the 98th percentile of all GPUs. The NVIDIA L4 scores 131,072 on average, which is in the 95th percentile.

Q: How large is the performance gap in the head-to-head tests?

A: In the Geekbench OpenCL test, the RTX PRO 5000 Blackwell scores 254,116 versus 140,838 for the L4, a delta of 80.4%. In the Geekbench Vulkan test, the RTX PRO 5000 Blackwell scores 282,631 against 121,306, a delta of 133%. The RTX PRO 5000 Blackwell wins both head-to-head benchmarks.

Q: What are the memory specifications of each card?

A: The RTX PRO 5000 Blackwell has 48 GB of GDDR7 memory on a 384-bit bus, yielding 1.34 TB/s of bandwidth. The L4 has 24 GB of GDDR6 memory on a 192-bit bus, providing 300.1 GB/s of bandwidth.

Q: What is the power consumption difference?

A: The RTX PRO 5000 Blackwell has a TDP of 300 W and requires a 700 W suggested PSU with a 1x 16-pin power connector. The L4 has a TDP of 72 W, a 250 W suggested PSU, and requires no external power connectors.

Q: Do both cards support the same graphics APIs?

A: Yes, both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. They are identical in API support despite their architectural differences.

Q: Which card is newer and what is its release date?

A: The RTX PRO 5000 Blackwell was released on March 17, 2025, succeeding Workstation Ada. The L4 was released on March 20, 2023, succeeding Server Ampere and preceding Server Hopper.

Architecture Differences

The RTX PRO 5000 Blackwell is built on the GB202 chip using Blackwell 2.0 architecture, fabricated on a 5 nm process at TSMC. It integrates 92,200 million transistors across a 750 mm² die, resulting in a transistor density of 122.9M per mm². The L4 uses the AD104 chip with Ada Lovelace architecture, also on a 5 nm TSMC process, but packs 35,800 million transistors on a 294 mm² die, with a density of 121.8M per mm². The RTX PRO 5000 Blackwell has nearly 2.6 times the transistor count and 2.55 times the die area.

Core configurations differ substantially. The RTX PRO 5000 Blackwell features 14,080 shading units, 440 TMUs, 160 ROPs, 110 RT cores, and 440 tensor cores. The L4 has 7,424 shading units, 240 TMUs, 80 ROPs, 60 RT cores, and 240 tensor cores. This means the RTX PRO 5000 Blackwell has roughly 1.9 times the shading units and RT cores, and 1.83 times the TMUs and tensor cores.

Clock behavior also diverges sharply. The RTX PRO 5000 Blackwell has a base clock of 1740 MHz and a boost clock of 2377 MHz. The L4 runs at a much lower base of 795 MHz but boosts to 2040 MHz. Memory clocks differ as well, with the RTX PRO 5000 Blackwell using 1750 MHz (28 Gbps effective) GDDR7, while the L4 uses 1563 MHz (12.5 Gbps effective) GDDR6.

The physical design reflects their intended environments. The RTX PRO 5000 Blackwell is a dual-slot card measuring 267 mm in length, 111 mm in height, and 40 mm in width, with 4x DisplayPort 2.1b outputs. The L4 is a single-slot card at 169 mm length and 56 mm height, with no display outputs, indicating its server-oriented role.

Where Each One Wins

The RTX PRO 5000 Blackwell wins in every measured benchmark category. In the head-to-head Geekbench OpenCL test, it outperforms the L4 by 80.4%, and in Geekbench Vulkan, the advantage grows to 133%. Its average benchmark score of 182,109 is 39% higher than the L4’s 131,072. This dominance extends across raw compute metrics: the RTX PRO 5000 Blackwell delivers 66.94 TFLOPS FP32 versus 30.29 TFLOPS for the L4, and its pixel rate of 380.3 GPixel/s more than doubles the L4’s 163.2 GPixel/s. Texture rate is similarly lopsided at 1,045.9 GTexel/s versus 489.6 GTexel/s.

The L4’s wins are not in performance but in physical efficiency and deployment flexibility. Its 72 W TDP requires no external power connectors, and its single-slot, 169 mm length allows installation in dense server chassis. The suggested PSU of 250 W is a fraction of the 700 W required for the RTX PRO 5000 Blackwell. For workloads where power density and space are critical constraints, the L4 offers a viable path, though with significantly lower compute throughput.

The RTX PRO 5000 Blackwell’s nearest rivals provide context for its standing. It is 0.9% behind the NVIDIA A100 SXM4 80 GB, 1.4% behind the RTX 5000 Ada Generation, and 2.3% ahead of the GeForce RTX 4090 D. The L4 sits 0.7% behind the GeForce RTX 3090 Ti, 3.1% behind the RTX 4000 Ada Generation and A10M, and 3.2% behind the AMD Radeon PRO W6800.

Specification Differences

The two cards differ across nearly every specification field. Memory capacity is 48 GB for the RTX PRO 5000 Blackwell versus 24 GB for the L4, with GDDR7 versus GDDR6 type and a 384-bit versus 192-bit bus width. Bandwidth is 1.34 TB/s versus 300.1 GB/s.

Compute resources show consistent doubling. Shading units are 14,080 versus 7,424, TMUs are 440 versus 240, ROPs are 160 versus 80, RT cores are 110 versus 60, and tensor cores are 440 versus 240. FP32 and FP16 performance are each 66.94 TFLOPS for the RTX PRO 5000 Blackwell versus 30.29 TFLOPS for the L4.

Clocks and power are radically different. The RTX PRO 5000 Blackwell has a 1740 MHz base and 2377 MHz boost, while the L4 has 795 MHz base and 2040 MHz boost. TDP is 300 W versus 72 W. The RTX PRO 5000 Blackwell is dual-slot with a 16-pin connector, while the L4 is single-slot with no power connector. Suggested PSU is 700 W versus 250 W.

Bus interface and display outputs also differ. The RTX PRO 5000 Blackwell uses PCIe 5.0 x16 and has 4x DisplayPort 2.1b outputs, while the L4 uses PCIe 4.0 x16 and has no outputs. Dimensions are 267 mm x 111 mm x 40 mm for the RTX PRO 5000 Blackwell versus 169 mm x 56 mm for the L4 (width not specified).

Head-to-Head Benchmarks

The Geekbench OpenCL test shows the RTX PRO 5000 Blackwell scoring 254,116 against the L4’s 140,838. This 80.4% delta reflects the fundamental compute advantage of the larger chip, more cores, and higher memory bandwidth. The RTX PRO 5000 Blackwell’s 14,080 shading units and 440 tensor cores provide a massive parallel throughput advantage over the L4’s 7,424 shading units and 240 tensor cores.

The Geekbench Vulkan test amplifies the gap further. The RTX PRO 5000 Blackwell scores 282,631, while the L4 manages 121,306, a 133% delta. This larger difference in Vulkan suggests the RTX PRO 5000 Blackwell’s newer Blackwell 2.0 architecture handles the graphics workload more efficiently relative to the L4’s Ada Lovelace implementation. The RTX PRO 5000 Blackwell’s 110 RT cores versus the L4’s 60 RT cores likely contribute to this outsized advantage in a rasterization and compute-heavy test.

Across both benchmarks, the RTX PRO 5000 Blackwell wins 2 out of 2 tests, giving it a clean sweep. The average benchmark scores reinforce this: 182,109 versus 131,072, a 39% overall lead. Notably, the RTX PRO 5000 Blackwell’s average score places it near the NVIDIA A100 SXM4 80 GB (183,725, -0.9%) and RTX 5000 Ada Generation (184,664, -1.4%), while the L4’s average aligns with the GeForce RTX 3090 Ti (131,938, -0.7%).

The Verdict

The data leads to a clear conclusion for compute-intensive workloads: the NVIDIA RTX PRO 5000 Blackwell is the superior choice. It wins both head-to-head benchmarks with deltas of 80.4% in OpenCL and 133% in Vulkan. Its 48 GB of GDDR7 memory with 1.34 TB/s bandwidth provides 4.5 times the memory bandwidth of the L4’s 300.1 GB/s, which is critical for large datasets. The 66.94 TFLOPS FP32 performance is more than double the L4’s 30.29 TFLOPS. For workstation use with display output requirements, the RTX PRO 5000 Blackwell’s 4x DisplayPort 2.1b outputs are essential, while the L4 has no outputs at all.

The NVIDIA L4 serves a different purpose. Its 72 W TDP, single-slot design, and lack of power connectors make it suitable for dense server deployments where power and space are at a premium. The suggested PSU of 250 W versus 700 W demonstrates its efficiency profile. However, its 24 GB memory and 300.1 GB/s bandwidth limit its capacity for large models, and its 30.29 TFLOPS FP32 performance is a fraction of the RTX PRO 5000 Blackwell’s capability.

Users needing maximum compute, memory capacity, and display connectivity should choose the RTX PRO 5000 Blackwell. Its 98th percentile ranking and proximity to the A100 SXM4 80 GB in average score (-0.9%) indicate it competes with top-tier accelerators. Users prioritizing power efficiency and physical footprint, and who can work without display outputs, may find the L4 adequate for lighter workloads, given its 95th percentile standing. The benchmark results, however, are unambiguous: the RTX PRO 5000 Blackwell outperforms the L4 in every measured test.