NVIDIA L4 vs NVIDIA RTX PRO 4500 Blackwell Server Comparison

The Verdict

The recorded database entries for these two server accelerators present an unusual comparison situation. The NVIDIA L4 has a complete benchmark profile, while the NVIDIA RTX PRO 4500 Blackwell Server currently has no recorded benchmark scores, no average score, and no rival comparisons in the database. The L4 sits at the 95th percentile of all GPUs with an average benchmark score of 131,072, placing it within a tight competitive cluster. Its nearest rivals include the NVIDIA GeForce RTX 3090 Ti at 131,938 (0.7% ahead), the NVIDIA RTX 4000 Ada Generation at 135,218 (3.1% ahead), the NVIDIA A10M at 135,230 (3.1% ahead), and the AMD Radeon PRO W6800 at 135,396 (3.2% ahead). The RTX PRO 4500 Blackwell Server, by contrast, has a 50th percentile placement with zero recorded measurements. For any workload requiring established performance validation, the L4 is the only option with verifiable data. The RTX PRO 4500 Blackwell Server cannot be recommended based on measurement evidence, as no benchmark results exist to support any performance claim.

Architecture Differences

The two accelerators come from different NVIDIA architecture generations. The L4 uses the AD104 chip built on the Ada Lovelace architecture, belonging to the Server Ada (Lxx) generation. The RTX PRO 4500 Blackwell Server uses the GB203 chip on the Blackwell 2.0 architecture, from the Server Blackwell (Bxx) generation. Both are manufactured by TSMC on a 5 nm process, but the transistor counts differ substantially. The L4 packs 35,800 million transistors on a 294 mm² die, yielding a transistor density of 121.8 million per square millimeter. The RTX PRO 4500 Blackwell Server contains 45,600 million transistors on a 378 mm² die, with a slightly lower density of 120.6 million per square millimeter.

Core configurations diverge sharply. The L4 has 7,424 shading units, 240 texture mapping units, 80 raster output pixels, 60 ray tracing cores, and 240 tensor cores. The RTX PRO 4500 Blackwell Server provides 10,496 shading units, 328 texture mapping units, 112 raster output pixels, 82 ray tracing cores, and 328 tensor cores. These are substantial increases across every compute category. Clock behavior also differs. The L4 runs at a 795 MHz base and 2040 MHz boost, while the RTX PRO 4500 Blackwell Server runs higher at 1215 MHz base and 2415 MHz boost.

Memory subsystems represent a major architectural leap. The L4 uses 24 GB of GDDR6 on a 192-bit bus, delivering 300.1 GB/s of bandwidth and a memory clock of 1563 MHz (12.5 Gbps effective). The RTX PRO 4500 Blackwell Server uses 32 GB of GDDR7 on a 256-bit bus, achieving 800.3 GB/s of bandwidth and a memory clock of 1563 MHz (25 Gbps effective). The bandwidth advantage is more than 2.6 times. Compute throughput follows the same pattern. The L4 delivers 30.29 TFLOPS for both FP32 and FP16 (1:1), while the RTX PRO 4500 Blackwell Server delivers 50.70 TFLOPS for both. Pixel and texture rates also scale upward: the L4 manages 163.2 GPixel/s and 489.6 GTexel/s, while the RTX PRO 4500 Blackwell Server reaches 270.5 GPixel/s and 792.1 GTexel/s.

Power and physical specifications diverge significantly. The L4 has a 72 W TDP, is single-slot, uses no power connectors, and requires a 250 W suggested PSU. Its dimensions are 169 mm in length and 56 mm in height. The RTX PRO 4500 Blackwell Server has a 165 W TDP, is also single-slot, but uses a single 16-pin power connector and requires a 450 W suggested PSU. Its dimensions are larger: 267 mm in length, 111 mm in height, and 40 mm in width. Both cards use PCIe, but the L4 uses PCIe 4.0 x16 while the RTX PRO 4500 Blackwell Server uses PCIe 5.0 x16. Neither card has display outputs. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The L4 was released in March 2023 and is currently listed as Active, while the RTX PRO 4500 Blackwell Server has a release date of March 2026 and is also Active. The L4 lists Server Ampere as its predecessor and Server Hopper as its successor, while the RTX PRO 4500 Blackwell Server lists Server Hopper as predecessor and Server Rubin as successor.

Where Each One Wins

Based purely on the recorded database measurements, the L4 wins in every category where data exists. It has two benchmark scores: 140,838 in Geekbench OpenCL and 121,306 in Geekbench Vulkan. The RTX PRO 4500 Blackwell Server has no benchmark scores at all. This means the L4 wins on measured compute performance, on percentile ranking (95th versus 50th), and on having a defined average score (131,072 versus 0). The RTX PRO 4500 Blackwell Server wins on theoretical specifications: higher core counts, more memory, faster memory bandwidth, higher clocks, greater FP32 and FP16 throughput, higher pixel and texture rates, and a newer PCIe interface. However, these are architectural specifications, not measured results. The database shows no wins for the RTX PRO 4500 Blackwell Server in any benchmark category, with winsA and winsB both recorded as zero. The L4 does not have a wins tally either, but it has actual scores to evaluate. Any workload that relies on verified performance data favors the L4. Any workload that can only be assessed by hardware specifications would favor the RTX PRO 4500 Blackwell Server, but that assessment would be speculative rather than based on database measurements.

FAQ

Q: Which card has a higher average benchmark score in the database?

A: The NVIDIA L4 has an average benchmark score of 131,072. The NVIDIA RTX PRO 4500 Blackwell Server has an average benchmark score of 0 because no benchmarks have been recorded for it.

Q: How does the L4 compare to its closest rivals?

A: The L4 trails the NVIDIA GeForce RTX 3090 Ti by 0.7%, the NVIDIA RTX 4000 Ada Generation by 3.1%, the NVIDIA A10M by 3.1%, and the AMD Radeon PRO W6800 by 3.2%. All of these rivals have average scores between 131,938 and 135,396, while the L4 sits at 131,072.

Q: What are the memory differences between the two cards?

A: The L4 uses 24 GB of GDDR6 on a 192-bit bus with 300.1 GB/s bandwidth. The RTX PRO 4500 Blackwell Server uses 32 GB of GDDR7 on a 256-bit bus with 800.3 GB/s bandwidth. The memory clock is 1563 MHz for both, but the effective data rate differs: 12.5 Gbps for the L4 versus 25 Gbps for the RTX PRO 4500 Blackwell Server.

Q: Which card has more shading units and tensor cores?

A: The RTX PRO 4500 Blackwell Server has 10,496 shading units and 328 tensor cores. The L4 has 7,424 shading units and 240 tensor cores. The RTX PRO 4500 Blackwell Server also has more ray tracing cores (82 versus 60) and more texture mapping units (328 versus 240).

Q: What power connector requirements do the cards have?

A: The L4 has no power connectors and a 72 W TDP with a 250 W suggested PSU. The RTX PRO 4500 Blackwell Server uses one 16-pin connector and has a 165 W TDP with a 450 W suggested PSU.

Q: When were these cards released?

A: The NVIDIA L4 was released on March 20, 2023. The NVIDIA RTX PRO 4500 Blackwell Server has a release date of March 16, 2026. Both are listed as Active production status.

Head-to-Head Benchmarks

The head-to-head benchmark section in the database contains no entries, meaning there are no direct comparative tests recorded between the NVIDIA L4 and the NVIDIA RTX PRO 4500 Blackwell Server. The only benchmark data available comes from the L4's individual scores. In Geekbench OpenCL, the L4 records 140,838 points. In Geekbench Vulkan, it records 121,306 points. These two results produce the L4's average of 131,072. The RTX PRO 4500 Blackwell Server has no individual test scores, no average, and no nearest rival comparisons. The L4's OpenCL score is higher than its Vulkan score by 19,532 points, indicating a 16.1% advantage for OpenCL in its own test suite. The L4's percentile placement at 95th out of all GPUs reflects these scores, while the RTX PRO 4500 Blackwell Server's 50th percentile is a default placement with no measurement backing. In terms of raw compute specifications, the RTX PRO 4500 Blackwell Server shows a 67.4% higher FP32 throughput (50.70 TFLOPS versus 30.29 TFLOPS) and a 166.6% higher memory bandwidth (800.3 GB/s versus 300.1 GB/s), but these figures come from the spec sheet, not from benchmark runs. The database records zero wins for either card in head-to-head testing, so the only verifiable comparison is the L4's standalone scores against the broader GPU population. Within that population, the L4 is nearly tied with the GeForce RTX 3090 Ti, which is only 0.7% ahead, and sits roughly 3% behind the RTX 4000 Ada Generation, the A10M, and the Radeon PRO W6800. The RTX PRO 4500 Blackwell Server cannot be positioned relative to these rivals because no data exists. The L4's measured performance places it in the upper tier of all recorded GPUs, while the RTX PRO 4500 Blackwell Server remains an unmeasured entry with specifications that suggest higher capability but no confirmed results.