NVIDIA L20 vs NVIDIA N1 20SM Comparison

The NVIDIA L20 and the NVIDIA N1 20SM occupy very different positions in the database. The L20 is a dedicated server accelerator with a complete set of benchmark results, while the N1 20SM is an integrated graphics processor with no recorded benchmark scores. This fundamental split shapes every comparison that follows.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two products. Instead, the comparison relies on the aggregate scores and percentile rankings recorded for each part.

The NVIDIA L20 has a recorded average benchmark score of 251,147. Its individual results show 274,276 in the Geekbench OpenCL test and 228,018 in the Geekbench Vulkan test. These figures place the L20 in the 99th percentile of all GPUs in the database, a position shared with only the highest-performing accelerators.

The NVIDIA N1 20SM has no recorded benchmarks at all. Its average benchmark score is listed as 0, and its percentile ranking sits at 50, the midpoint of the distribution. This is not a performance figure but rather an indicator that no measurement data exists for the part. Without a recorded score, there is no basis for a direct numerical comparison between the two accelerators.

The L20's closest rivals in the database provide context for its position. The NVIDIA PG506-232 scores 225,124, which is 11.6% lower than the L20. The AMD Radeon PRO W7900D scores 219,827, sitting 14.2% behind. Moving upward, the NVIDIA L40 scores 284,111, which is 11.6% ahead of the L20, while the NVIDIA RTX 6000 Ada Generation scores 287,237, leading the L20 by 12.6%. These deltas situate the L20 in a tight cluster of high-end workstation and server GPUs, with the recorded data showing it firmly in the upper-middle of that group.

Architecture Differences

The two chips share a foundry and manufacturing process but diverge sharply in nearly every architectural decision. Both use TSMC as the foundry and a 5 nm process node, but the similarities end there.

The L20 uses the AD102 chip, built on the Ada Lovelace architecture. The N1 20SM uses the GB20B chip, built on the Blackwell 2.0 architecture. The L20 belongs to the Server Ada (Lxx) generation, while the N1 20SM is part of the Blackwell IGP (N1x) generation. The L20's predecessor is listed as Server Ampere and its successor as Server Hopper, indicating its position in NVIDIA's server product line. The N1 20SM has no listed predecessor or successor.

The transistor counts differ dramatically. The L20 integrates 76,300 million transistors on a 609 mm² die, yielding a transistor density of 125.3 million per square millimeter. The N1 20SM's transistor count is listed as unknown, but its die size is 382 mm², considerably smaller than the L20's. The density field for the N1 20SM is not recorded.

Memory architecture shows a clear split in design priorities. The L20 uses 48 GB of GDDR6 memory on a 384-bit bus, producing 864.0 GB/s of bandwidth. The N1 20SM uses 128 GB of LPDDR5X memory on a 256-bit bus, producing 273.2 GB/s of bandwidth. The L20's memory clock runs at 2250 MHz with 18 Gbps effective speed, while the N1 20SM's memory runs at 1067 MHz with 8.5 Gbps effective speed. The L20 prioritizes bandwidth for compute workloads; the N1 20SM prioritizes capacity for integrated use.

Compute resources follow the same pattern. The L20 carries 11,776 shading units, 368 texture mapping units, and 128 raster output pipelines. It also includes 92 ray tracing cores and 368 tensor cores. The N1 20SM carries 2,560 shading units, 160 texture mapping units, and 24 raster output pipelines, with 20 ray tracing cores and 80 tensor cores. The L20 has more than four times the shading units and more than four times the tensor cores.

Clock speeds present an interesting inversion. The L20 has a base clock of 1440 MHz and a boost clock of 2520 MHz. The N1 20SM has a base clock of 741 MHz and a boost clock of 2346 MHz. The L20 starts higher and boosts higher, but the N1 20SM's boost clock comes within 174 MHz of the L20's, a relatively modest gap given the massive difference in compute resources.

Where Each One Wins

The recorded data supports a clear division of strengths. The L20 wins in every measured compute category. Its FP32 throughput is 59.35 TFLOPS, compared to 12.01 TFLOPS for the N1 20SM. FP16 performance is identical to FP32 for both parts, listed at 1:1 ratios, meaning the L20 again delivers 59.35 TFLOPS against the N1 20SM's 12.01 TFLOPS. The L20's pixel rate is 322.6 GPixel/s versus 56.30 GPixel/s, and its texture rate is 927.4 GTexel/s versus 375.4 GTexel/s.

The L20 also wins on memory bandwidth by a wide margin. Its 864.0 GB/s is more than three times the N1 20SM's 273.2 GB/s. This bandwidth advantage directly supports the L20's higher compute throughput, as data movement is typically a bottleneck for the workloads these accelerators handle.

The N1 20SM wins on memory capacity. Its 128 GB of LPDDR5X is nearly three times the L20's 48 GB of GDDR6. For workloads that require large models or datasets to reside entirely in local memory, the N1 20SM's capacity advantage could be decisive, even with lower bandwidth.

The N1 20SM also differs in its interface and power profile. It uses PCIe 5.0 x16, a newer bus standard than the L20's PCIe 4.0 x16. It is an integrated graphics processor with no power connectors and no listed TDP, while the L20 is a dual-slot card requiring a single 16-pin connector with a listed TDP of 275 W and a suggested power supply of 600 W.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA L20 has a recorded average benchmark score of 251,147. The NVIDIA N1 20SM has no recorded benchmarks, with an average score of 0.

Q: How does the L20 compare to its nearest rivals in the database?

A: The L20 sits 11.6% above the NVIDIA PG506-232 and 14.2% above the AMD Radeon PRO W7900D. It sits 11.6% below the NVIDIA L40 and 12.6% below the NVIDIA RTX 6000 Ada Generation.

Q: What are the memory configurations of the two GPUs?

A: The L20 uses 48 GB of GDDR6 memory on a 384-bit bus with 864.0 GB/s bandwidth. The N1 20SM uses 128 GB of LPDDR5X memory on a 256-bit bus with 273.2 GB/s bandwidth.

Q: Which GPU has more compute units?

A: The L20 has 11,776 shading units, 368 TMUs, 128 ROPs, 92 RT cores, and 368 tensor cores. The N1 20SM has 2,560 shading units, 160 TMUs, 24 ROPs, 20 RT cores, and 80 tensor cores.

Q: Do the two GPUs use the same architecture?

A: No. The L20 uses the AD102 chip with the Ada Lovelace architecture. The N1 20SM uses the GB20B chip with the Blackwell 2.0 architecture.

Q: What is the percentile ranking of each GPU in the database?

A: The L20 is in the 99th percentile of all GPUs. The N1 20SM is in the 50th percentile, which reflects its lack of recorded benchmark data rather than a measured performance level.

Q: What are the physical form factors of the two GPUs?

A: The L20 is a dual-slot card measuring 267 mm in length and 111 mm in height. The N1 20SM is an integrated graphics processor with no recorded dimensions.

The Verdict

The data shows two products designed for entirely different roles. The NVIDIA L20 is a server accelerator with recorded performance in the 99th percentile, delivering 59.35 TFLOPS of FP32 compute, 864.0 GB/s of memory bandwidth, and a boost clock of 2520 MHz. Its benchmark scores place it among the top accelerators in the database, slightly behind the NVIDIA L40 and RTX 6000 Ada Generation but ahead of the PG506-232 and Radeon PRO W7900D.

The NVIDIA N1 20SM is an integrated graphics processor with no recorded benchmark scores. Its 12.01 TFLOPS of FP32 compute and 273.2 GB/s of memory bandwidth are substantially lower than the L20's figures. Its strengths lie in memory capacity, with 128 GB of LPDDR5X, and in its integrated form factor with PCIe 5.0 support.

A system builder with compute-intensive workloads should select the L20 based on its measured performance. The recorded data confirms it can handle high-throughput tasks with its large shading unit count, tensor core array, and memory bandwidth. The N1 20SM's lack of benchmark data means no performance claim can be supported from the database, and its lower compute throughput makes it unsuitable for the same workloads regardless.

A system builder needing maximum memory capacity in an integrated package should consider the N1 20SM, since its 128 GB allocation is the largest recorded between the two. But the absence of any benchmark scores for the N1 20SM means its real-world performance cannot be verified from the available data. The L20 is the only one of the two with measured results, and those results are strong.

Specification Differences

The two GPUs differ in every major specification category. The chip design differs: AD102 for the L20 versus GB20B for the N1 20SM. The architecture differs: Ada Lovelace for the L20 versus Blackwell 2.0 for the N1 20SM. The generation differs: Server Ada (Lxx) for the L20 versus Blackwell IGP (N1x) for the N1 20SM.

The die sizes differ: 609 mm² for the L20 versus 382 mm² for the N1 20SM. Transistor counts are 76,300 million for the L20 and unknown for the N1 20SM. The L20 has a recorded transistor density of 125.3M per mm²; the N1 20SM has none recorded.

Clock speeds differ: the L20 runs at 1440 MHz base and 2520 MHz boost, while the N1 20SM runs at 741 MHz base and 2346 MHz boost. Memory clocks differ as well: 2250 MHz with 18 Gbps effective for the L20, 1067 MHz with 8.5 Gbps effective for the N1 20SM.

Memory configurations differ completely: 48 GB GDDR6 on a 384-bit bus with 864.0 GB/s bandwidth for the L20, versus 128 GB LPDDR5X on a 256-bit bus with 273.2 GB/s bandwidth for the N1 20SM.

Compute resources differ: 11,776 shading units, 368 TMUs, 128 ROPs, 92 RT cores, and 368 tensor cores for the L20, versus 2,560 shading units, 160 TMUs, 24 ROPs, 20 RT cores, and 80 tensor cores for the N1 20SM.

Output rates differ: 322.6 GPixel/s and 927.4 GTexel/s for the L20, versus 56.30 GPixel/s and 375.4 GTexel/s for the N1 20SM. FP32 and FP16 throughput differ: 59.35 TFLOPS for the L20, 12.01 TFLOPS for the N1 20SM, both at 1:1 ratios.

Power and physical specifications differ: the L20 has a 275 W TDP, dual-slot form factor, and a single 16-pin power connector, while the N1 20SM has no listed TDP, an IGP form factor, and no power connectors. The L20 lists a 600 W suggested power supply; the N1 20SM lists none.

Interfaces differ: the L20 uses PCIe 4.0 x16, the N1 20SM uses PCIe 5.0 x16. Display outputs differ: 4x DisplayPort 1.4a for the L20, 1x HDMI for the N1 20SM. API support differs: the L20 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the N1 20SM lists N/A for DirectX, OpenGL, and Vulkan.

Release dates differ: the L20 was released on 2023-11-15, the N1 20SM on 2026-05-31. The L20 lists a predecessor, Server Ampere, and a successor, Server Hopper. The N1 20SM lists neither. Both are currently marked Active in production status.