NVIDIA L20 vs NVIDIA PG506-232 Comparison

# NVIDIA L20 vs NVIDIA PG506-232

The NVIDIA L20 and NVIDIA PG506-232 occupy different corners of the server GPU landscape, and the benchmark data reflects a clear generational split. The L20, built on Ada Lovelace architecture and released in late 2023, posts an average benchmark score of 251,147, placing it 11.6% ahead of the PG506-232's 225,124. The PG506-232, an Ampere-generation part from 2021, sits at the 99th percentile among all GPUs, but the data shows it is increasingly outclassed by newer silicon. Both cards target compute-heavy server workloads, yet their architectural philosophies diverge sharply—one prioritizes raw throughput with massive memory capacity, the other leans on efficiency and dense compute features.

Where Each One Wins

The L20 wins the only head-to-head benchmark available: Geekbench OpenCL. It scores 274,276 against the PG506-232's 225,124, a 21.8% advantage. This is not a marginal victory; it is a decisive gap that suggests the L20 handles general-purpose compute tasks substantially better. The L20 also holds a Vulkan score of 228,018, though the PG506-232 has no Vulkan result to compare—a telling absence for a card that lacks display outputs and likely targets compute-only environments.

The PG506-232's strengths lie elsewhere. Its nearest rival data shows it beating the AMD Radeon PRO W7900D by 2.4% and the NVIDIA RTX 6000D by 14.9%, with an average score of 225,124. It also edges out the NVIDIA A100 PCIe 80 GB by 8.7%, which is notable because the A100 is a widely deployed server workhorse. The PG506-232's 933.1 GB/s of memory bandwidth exceeds the L20's 864.0 GB/s, suggesting it could win in bandwidth-bound workloads like large matrix operations or high-resolution data processing. However, without a head-to-head test that isolates memory throughput, the data only confirms the PG506-232 holds its own against older peers.

The L20, meanwhile, dominates in raw compute horsepower. Its FP32 throughput of 59.35 TFLOPS is more than five times the PG506-232's 10.32 TFLOPS, and its texture rate of 927.4 GTexel/s is nearly triple. For workloads that scale with shading units and tensor cores—such as AI inference, rendering, or scientific simulation—the L20 is the clear winner in the data.

Architecture Differences

The architectural split is stark. The L20 uses the AD102 chip on a 5 nm process from TSMC, packing 76,300 million transistors into a 609 mm² die. That yields a transistor density of 125.3 million per mm². The PG506-232 uses the GA100 chip on a 7 nm process, with 54,200 million transistors on a larger 826 mm² die, resulting in just 65.6 million transistors per mm². The L20 is nearly twice as dense, which explains how it achieves higher performance despite a smaller physical footprint.

The L20's Ada Lovelace architecture brings 11,776 shading units, 368 TMUs, 128 ROPs, 92 RT cores, and 368 tensor cores. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The PG506-232's Ampere architecture offers 3,584 shading units, 224 TMUs, 96 ROPs, and 224 tensor cores—but no RT cores and no API support listed. This makes the PG506-232 a pure compute accelerator with no graphics or ray tracing capabilities, while the L20 retains full graphics features including four DisplayPort 1.4a outputs.

Memory configurations also diverge. The L20 has 48 GB of GDDR6 on a 384-bit bus, while the PG506-232 has 24 GB of HBM2 on a 3072-bit bus. The HBM2's wider bus gives the PG506-232 a bandwidth advantage (933.1 GB/s vs. 864.0 GB/s), but the L20 offers double the capacity. Clock speeds favor the L20 as well: 1440 MHz base and 2520 MHz boost versus the PG506-232's 930 MHz base and 1440 MHz boost.

Head-to-Head Benchmarks

The single head-to-head test—Geekbench OpenCL—delivers a clear verdict. The L20 scores 274,276, beating the PG506-232's 225,124 by 21.8%. This delta is consistent with the L20's overall average benchmark advantage of 11.6%, though the gap widens in this specific test. The OpenCL result likely reflects the L20's superior shading unit count and higher clock speeds; with 11,776 shading units at a 2520 MHz boost, the L20 can process far more parallel work per cycle than the PG506-232's 3,584 units at 1440 MHz.

The PG506-232, however, is not without merit in the broader data. Its nearest rival comparisons show it outperforming the A100 PCIe 80 GB by 8.7% and the RTX 6000D by 14.9%. This suggests that within its Ampere generation, the PG506-232 is a strong performer—it just cannot match the architectural leap of Ada Lovelace. The L20's nearest rival data reinforces this: it sits 14.2% ahead of the AMD Radeon PRO W7900D and only 11.6% behind the NVIDIA L40, which is a more expensive, higher-tier server card. The L20 is positioned between these two, making it a compelling middle-ground choice.

FAQ

Q: Which GPU has higher raw compute performance?

A: The L20 dominates with 59.35 TFLOPS FP32 versus the PG506-232's 10.32 TFLOPS, a more than 5x advantage in theoretical peak throughput.

Q: Does the PG506-232 have any advantage over the L20?

A: Yes, in memory bandwidth. The PG506-232 delivers 933.1 GB/s over a 3072-bit HBM2 bus, exceeding the L20's 864.0 GB/s on a 384-bit GDDR6 bus. It also has a lower TDP of 165 W compared to the L20's 275 W.

Q: Can either card handle graphics workloads?

A: The L20 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and has 4x DisplayPort outputs. The PG506-232 has no display outputs and no API support listed, making it compute-only.

Q: How do these cards compare to their nearest rivals?

A: The L20 is 11.6% ahead of the PG506-232, 14.2% ahead of the AMD Radeon PRO W7900D, but 11.6% behind the NVIDIA L40 and 12.6% behind the RTX 6000 Ada Generation. The PG506-232 is 2.4% ahead of the W7900D, 8.7% ahead of the A100 PCIe 80 GB, and 14.9% ahead of the RTX 6000D.

Q: What is the memory capacity difference?

A: The L20 has 48 GB of GDDR6, double the PG506-232's 24 GB of HBM2. This makes the L20 better suited for large datasets that exceed 24 GB.

Q: Which GPU is more power-efficient?

A: The PG506-232 has a lower TDP at 165 W versus the L20's 275 W, and requires a 450 W suggested PSU compared to the L20's 600 W. However, the L20 delivers significantly more performance per watt given its TFLOPS advantage.

Specification Differences

| Specification | NVIDIA L20 | NVIDIA PG506-232 |

|---------------|------------|------------------|

| Chip | AD102 | GA100 |

| Architecture | Ada Lovelace | Ampere |

| Process Node | 5 nm | 7 nm |

| Transistors | 76,300 million | 54,200 million |

| Die Size | 609 mm² | 826 mm² |

| Transistor Density | 125.3M / mm² | 65.6M / mm² |

| Base Clock | 1440 MHz | 930 MHz |

| Boost Clock | 2520 MHz | 1440 MHz |

| Memory Clock | 2250 MHz (18 Gbps effective) | 1215 MHz (2.4 Gbps effective) |

| Memory Size | 48 GB | 24 GB |

| Memory Type | GDDR6 | HBM2 |

| Memory Bus | 384 bit | 3072 bit |

| Bandwidth | 864.0 GB/s | 933.1 GB/s |

| Shading Units | 11,776 | 3,584 |

| TMUs | 368 | 224 |

| ROPs | 128 | 96 |

| RT Cores | 92 | None |

| Tensor Cores | 368 | 224 |

| Pixel Rate | 322.6 GPixel/s | 138.2 GPixel/s |

| Texture Rate | 927.4 GTexel/s | 322.6 GTexel/s |

| FP32 | 59.35 TFLOPS | 10.32 TFLOPS |

| FP16 | 59.35 TFLOPS (1:1) | 10.32 TFLOPS (1:1) |

| TDP | 275 W | 165 W |

| Power Connectors | 1x 16-pin | 8-pin EPS |

| Suggested PSU | 600 W | 450 W |

| Display Outputs | 4x DisplayPort 1.4a | No outputs |

| DirectX | 12 Ultimate (12_2) | None |

| OpenGL | 4.6 | None |

| Vulkan | 1.4 | None |

| Production Status | Active | End-of-life |

| Release Date | 2023-11-15 | 2021-04-11 |

| Predecessor | Server Ampere | Tesla Turing |

| Successor | Server Hopper | Server Ada |

The Verdict

The data points to a clear choice for most workloads: the NVIDIA L20. Its 21.8% OpenCL lead, 5.7x FP32 advantage, and double the memory capacity make it the superior compute card on paper and in benchmark results. The L20 also brings modern features like RT cores, Vulkan support, and display outputs, which the PG506-232 lacks entirely. For AI inference, scientific computing, or any task that benefits from massive parallel throughput, the L20 is the data-backed pick.

The PG506-232 is not obsolete, though. Its higher memory bandwidth (933.1 GB/s) and lower power draw (165 W) make it a candidate for bandwidth-sensitive workloads or power-constrained deployments. It also outperforms several contemporaries—the A100 PCIe 80 GB by 8.7% and the RTX 6000D by 14.9%—so in a mixed fleet of Ampere-era cards, it holds value. However, its end-of-life status and lack of graphics capability limit its future-proofing.

For buyers choosing between these two today, the L20's active production status and 48 GB capacity argue for longevity. The PG506-232's 24 GB HBM2 may hit capacity walls sooner, and its 10.32 TFLOPS FP32 is a fraction of the L20's output. The L20 is the safer bet for general server workloads, while the PG506-232 makes sense only if memory bandwidth or power efficiency is the absolute priority and the workload fits within 24 GB. The benchmark data is unambiguous: the L20 wins the compute race, and the PG506-232 wins only on niche bandwidth and efficiency metrics.