AMD Radeon 820M vs NVIDIA L20 Comparison

FAQ

Q: What are the two GPUs compared here?

A: The AMD Radeon 820M is an integrated graphics processor (IGP) from the Krackan Point 2 chip, built on RDNA 3.5 architecture, while the NVIDIA L20 is a server-grade discrete GPU based on the AD102 chip and Ada Lovelace architecture.

Q: How do their benchmark scores compare?

A: The NVIDIA L20 holds an average benchmark score of 251,147, with a Geekbench OpenCL score of 274,276 and a Vulkan score of 228,018. The AMD Radeon 820M has no recorded benchmark scores in the database, so no direct numerical comparison is possible.

Q: What is the performance percentile ranking for each GPU?

A: The NVIDIA L20 ranks in the 99th percentile among all GPUs, while the AMD Radeon 820M sits at the 50th percentile. This indicates the L20 is near the top of the performance distribution, while the 820M is positioned at the median.

Q: Which GPUs are closest in performance to the NVIDIA L20?

A: The nearest rivals include the NVIDIA PG506-232 (average score 225,124, which is 11.6% lower than the L20), the AMD Radeon PRO W7900D (219,827, 14.2% lower), the NVIDIA L40 (284,111, 11.6% higher), and the NVIDIA RTX 6000 Ada Generation (287,237, 12.6% higher).

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

A: The NVIDIA L20 has 48 GB of GDDR6 memory on a 384-bit bus with 864.0 GB/s bandwidth. The AMD Radeon 820M uses system-shared memory, with its size, type, bus width, and bandwidth all listed as "System Shared" or "System Dependent."

Q: What are the power requirements for each GPU?

A: The AMD Radeon 820M has a TDP of 15 W and requires no power connectors, as it is an integrated processor. The NVIDIA L20 has a TDP of 275 W, uses a single 16-pin power connector, and carries a suggested PSU rating of 600 W.

Architecture Differences

The two GPUs represent fundamentally different design philosophies. The AMD Radeon 820M is an integrated graphics processor built into the Krackan Point 2 chip, using RDNA 3.5 architecture from the Navi III IGP generation. It is fabricated on a 4 nm process at TSMC. In contrast, the NVIDIA L20 is a discrete server GPU using Ada Lovelace architecture from the Server Ada (Lxx) generation, built on a 5 nm process, also at TSMC. The L20 uses the AD102 chip, which contains 76,300 million transistors on a 609 mm² die, giving a transistor density of 125.3M per mm². The 820M's transistor count and die size are unknown.

The shading engine counts differ by two orders of magnitude. The Radeon 820M has 128 shading units, 8 texture mapping units, 4 ROPs, and 2 ray tracing cores, with no tensor cores listed. The NVIDIA L20 has 11,776 shading units, 368 TMUs, 128 ROPs, 92 ray tracing cores, and 368 tensor cores. This massive disparity in execution resources explains the performance gap between the two parts.

Clock behavior also differs significantly. The Radeon 820M runs at a base clock of 400 MHz and boosts to 2800 MHz, while the L20 has a base of 1440 MHz and boosts to 2520 MHz. Despite the higher boost clock on the AMD part, the L20's far larger execution width produces dramatically higher throughput. The L20's memory clock is 2250 MHz with 18 Gbps effective speed, whereas the 820M relies entirely on shared system memory.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API feature parity exists. The bus interfaces differ: the 820M connects via PCIe 4.0 x8, while the L20 uses PCIe 4.0 x16. The L20 is a dual-slot card measuring 267 mm in length and 111 mm in height, with four DisplayPort 1.4a outputs. The 820M is an IGP with no slot width, no power connectors, and its display outputs are dependent on the portable device it is integrated into.

The Verdict

The data indicates a clear performance hierarchy. The NVIDIA L20 sits in the 99th percentile of all GPUs with an average benchmark score of 251,147, while the AMD Radeon 820M holds only the 50th percentile with no recorded benchmark scores. The nearest rivals to the L20 are all professional or server-grade parts: the PG506-232 trails by 11.6%, the Radeon PRO W7900D trails by 14.2%, while the L40 and RTX 6000 Ada Generation lead by 11.6% and 12.6% respectively.

For workloads requiring 48 GB of GDDR6 memory, 864.0 GB/s of bandwidth, and 59.35 TFLOPS of FP32 compute, the NVIDIA L20 is the only viable option between these two. Its 368 tensor cores and 92 ray tracing cores provide hardware acceleration for AI inference and ray-traced rendering. The Radeon 820M, with 716.8 GFLOPS of FP32 performance and 2 ray tracing cores, is suited only for basic integrated graphics duties in a portable device.

The TDP figures underscore the intended use cases. The 820M draws 15 W and requires no external power, making it appropriate for thin-and-light systems. The L20 draws 275 W and needs a 600 W power supply, placing it squarely in workstation and server territory. The release dates confirm this split: the 820M launched on February 28, 2025, while the L20 arrived on November 15, 2023.

Users with server or professional rendering needs should select the L20 based on its benchmark dominance and memory capacity. Users of portable devices with integrated graphics requirements will find the 820M sufficient for basic tasks, but the recorded data provides no evidence that it can compete with the L20 in any compute-intensive scenario.

Specification Differences

| Specification | AMD Radeon 820M | NVIDIA L20 |

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

| Architecture | RDNA 3.5 | Ada Lovelace |

| Process Node | 4 nm | 5 nm |

| Transistors | Unknown | 76,300 million |

| Die Size | Unknown | 609 mm² |

| Base Clock | 400 MHz | 1440 MHz |

| Boost Clock | 2800 MHz | 2520 MHz |

| Memory Size | System Shared | 48 GB |

| Memory Type | System Shared | GDDR6 |

| Memory Bus Width | System Shared | 384 bit |

| Memory Bandwidth | System Dependent | 864.0 GB/s |

| Shading Units | 128 | 11,776 |

| TMUs | 8 | 368 |

| ROPs | 4 | 128 |

| Ray Tracing Cores | 2 | 92 |

| Tensor Cores | None | 368 |

| Pixel Rate | 11.20 GPixel/s | 322.6 GPixel/s |

| Texture Rate | 22.40 GTexel/s | 927.4 GTexel/s |

| FP32 Performance | 716.8 GFLOPS | 59.35 TFLOPS |

| FP16 Performance | 716.8 GFLOPS (1:1) | 59.35 TFLOPS (1:1) |

| TDP | 15 W | 275 W |

| Slot Width | IGP | Dual-slot |

| Power Connectors | None | 1x 16-pin |

| Suggested PSU | None | 600 W |

| Bus Interface | PCIe 4.0 x8 | PCIe 4.0 x16 |

| Display Outputs | Portable Device Dependent | 4x DisplayPort 1.4a |

| Length | None | 267 mm (10.5 inches) |

| Height | None | 111 mm (4.4 inches) |

| Release Date | 2025-02-28 | 2023-11-15 |

| Predecessor | Navi II IGP | Server Ampere |

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two GPUs, and the AMD Radeon 820M has no individual benchmark scores recorded. The NVIDIA L20, however, has two Geekbench results that establish its performance envelope. In Geekbench OpenCL, the L20 scores 274,276, and in Geekbench Vulkan, it scores 228,018. The average across all recorded benchmarks is 251,147.

The L20's nearest rival comparisons provide context for its standing. Against the NVIDIA PG506-232, the L20 leads by 11.6% (251,147 versus 225,124). Against the AMD Radeon PRO W7900D, the lead expands to 14.2% (251,147 versus 219,827). Moving up the ladder, the NVIDIA L40 outperforms the L20 by 11.6% (284,111 versus 251,147), and the RTX 6000 Ada Generation leads by 12.6% (287,237 versus 251,147).

The compute throughput figures tell a similar story. The L20 delivers 59.35 TFLOPS of FP32 and FP16 performance, while the 820M manages 716.8 GFLOPS in both formats. The L20's pixel rate of 322.6 GPixel/s dwarfs the 820M's 11.20 GPixel/s, and the texture rate of 927.4 GTexel/s versus 22.40 GTexel/s shows the same 40-fold gap. The L20's 48 GB GDDR6 memory with 864.0 GB/s bandwidth stands against the 820M's system-shared memory with bandwidth that is system dependent.

The percentile rankings reinforce the divide. The L20's 99th percentile placement among all GPUs indicates it outperforms 98% of the field, while the 820M's 50th percentile places it exactly at the median. No benchmark data exists for the 820M to provide a direct score comparison, so the specification differences and percentile rankings serve as the primary indicators of relative capability. The production status of both GPUs is Active, meaning both are currently available in the market.