AMD Radeon 820M vs NVIDIA L4 Comparison

Head-to-Head Benchmarks

The recorded data contains benchmark results for only one of the two products in this comparison. The NVIDIA L4 has two Geekbench scores: 140,838 in OpenCL and 121,306 in Vulkan. The AMD Radeon 820M has no benchmark entries in the database, which means a direct numerical head-to-head comparison cannot be constructed from the available measurements. The L4's average benchmark score stands at 131,072, placing it in the 95th percentile of all GPUs tracked by the database. The Radeon 820M holds a 50th percentile ranking, though this figure is derived from its overall standing rather than from recorded test scores.

The L4's nearest rivals in the database provide useful context for interpreting its performance tier. The NVIDIA GeForce RTX 3090 Ti posts an average score of 131,938, which is 0.7% higher than the L4's average. The NVIDIA RTX 4000 Ada Generation and NVIDIA A10M both score 135,218 and 135,230 respectively, each about 3.1% ahead of the L4. The AMD Radeon PRO W6800 reaches 135,396, a 3.2% advantage. These deltas show the L4 operating within a tight performance band near the top of the database, slightly behind several workstation-class accelerators but close enough that the differences are minor in percentage terms.

Because the Radeon 820M has no benchmark scores, the wins count in the head-to-head table sits at 0 for both products. The data does not support a claim that either GPU outperforms the other in any tested workload. The L4's numbers stand alone as recorded measurements, while the Radeon 820M's absence of test results means its relative performance cannot be quantified from the database.

The OpenCL and Vulkan scores for the L4 reveal an interesting pattern. The OpenCL result of 140,838 exceeds the Vulkan result of 121,306 by roughly 16%. This gap suggests the L4's compute-oriented architecture responds differently to these two APIs, with OpenCL workloads drawing out higher throughput. The Vulkan score, while lower, still represents a substantial result that aligns with the L4's positioning among server accelerators.

Where Each One Wins

The Radeon 820M's competitive territory lies entirely outside measured benchmarks. As an integrated graphics processor with a 15 W TDP and system-shared memory, its design targets portable devices where discrete GPU installation is impossible. The database shows no benchmark wins for the Radeon 820M, but its specifications indicate a role in lightweight, power-constrained systems rather than performance-critical compute tasks.

The NVIDIA L4 wins in every measurable category by default, since it is the only product in this comparison with recorded test data. Its 24 GB of GDDR6 memory on a 192-bit bus delivers 300.1 GB/s of bandwidth, a figure that dwarfs the Radeon 820M's system-dependent memory performance. The L4's 72 W TDP, while higher than the Radeon's 15 W, remains modest for a server accelerator and allows single-slot designs without power connectors.

Use-case separation emerges from the architectural data. The L4 targets server deployments: it has no display outputs, uses a PCIe 4.0 x16 interface, and carries 240 tensor cores alongside 60 ray tracing cores. The Radeon 820M, by contrast, is an IGP with portable-device-dependent outputs, a PCIe 4.0 x8 interface, and just 2 ray tracing cores. The Radeon's 128 shading units, 8 texture mapping units, and 4 render output units represent a fundamentally smaller execution engine compared to the L4's 7,424 shading units, 240 TMUs, and 80 ROPs.

For applications requiring massive parallel throughput, the L4's 30.29 TFLOPS FP32 performance and 489.6 GTexel/s texture rate place it in a different performance class entirely. The Radeon 820M's 716.8 GFLOPS FP32 and 22.40 GTexel/s texture rate indicate a GPU built for basic graphics acceleration rather than heavy compute. The pixel rate difference tells a similar story: 163.2 GPixel/s for the L4 versus 11.20 GPixel/s for the Radeon.

Architecture Differences

The two GPUs come from different architectural generations and manufacturing processes. The AMD Radeon 820M uses RDNA 3.5 architecture on a 4 nm TSMC process, part of the Navi III IGP generation for Strix Point Mobile. Its chip is designated Krackan Point 2. The NVIDIA L4 employs Ada Lovelace architecture on a 5 nm TSMC process, belonging to the Server Ada (Lxx) generation. The L4's AD104 chip contains 35,800 million transistors on a 294 mm² die, yielding a transistor density of 121.8 million per square millimeter. The Radeon 820M's transistor count and die size are recorded as unknown in the database.

Clock behavior differs substantially between the two. The Radeon 820M has a 400 MHz base clock and a 2800 MHz boost clock, while the L4 operates at 795 MHz base and 2040 MHz boost. The Radeon's higher boost clock reflects its integrated nature and the thermal headroom available in mobile designs, but the L4's much larger execution unit count compensates for its lower boost frequency.

Memory architecture represents a fundamental divide. The Radeon 820M uses system shared memory with a system-dependent bandwidth, meaning its performance scales with the host device's memory subsystem. The L4 has dedicated 24 GB GDDR6 memory running at 1563 MHz with 12.5 Gbps effective speed, delivering 300.1 GB/s across a 192-bit bus. This dedicated memory allocation is critical for server workloads that require consistent bandwidth without competing with CPU processes.

Compute feature sets diverge in ways that matter for specialized workloads. The L4 includes 240 tensor cores and 60 RT cores, enabling hardware acceleration for AI inference and ray-traced rendering. The Radeon 820M includes only 2 RT cores and no tensor cores, limiting its capability in those domains. Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility does not differentiate them.

The L4's predecessor is recorded as Server Ampere with Server Hopper as its successor, while the Radeon 820M's predecessor is Navi II IGP with no successor listed. The L4 was released on 2023-03-20, and the Radeon 820M followed on 2025-02-28. Both products remain in active production status.

FAQ

Q: Which GPU has higher benchmark scores in the database?

A: The NVIDIA L4 has recorded scores of 140,838 in Geekbench OpenCL and 121,306 in Geekbench Vulkan, with an average of 131,072. The AMD Radeon 820M has no benchmark entries in the database.

Q: How does the NVIDIA L4 compare to its nearest rivals?

A: The L4 sits 0.7% behind the GeForce RTX 3090 Ti (131,938), 3.1% behind both the RTX 4000 Ada Generation (135,218) and the A10M (135,230), and 3.2% behind the Radeon PRO W6800 (135,396).

Q: What memory configurations do these GPUs use?

A: The Radeon 820M uses system shared memory with bandwidth dependent on the host system. The L4 has 24 GB of dedicated GDDR6 memory with 300.1 GB/s bandwidth on a 192-bit bus.

Q: Are both GPUs suitable for the same types of systems?

A: No. The Radeon 820M is an IGP with portable-device-dependent outputs and a 15 W TDP. The L4 is a single-slot server accelerator with no display outputs and a 72 W TDP.

Q: What are the shading unit counts for each GPU?

A: The Radeon 820M has 128 shading units, while the L4 has 7,424 shading units, a 58-fold difference in raw shader count.

Q: Which GPU has tensor core support?

A: Only the NVIDIA L4 includes tensor cores, with 240 of them. The Radeon 820M lists no tensor cores in its specifications.

Specification Differences

| Specification | AMD Radeon 820M | NVIDIA L4 |

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

| Architecture | RDNA 3.5 | Ada Lovelace |

| Process Node | 4 nm | 5 nm |

| Transistors | Unknown | 35,800 million |

| Die Size | Unknown | 294 mm² |

| Transistor Density | Not recorded | 121.8M / mm² |

| Base Clock | 400 MHz | 795 MHz |

| Boost Clock | 2800 MHz | 2040 MHz |

| Memory Size | System Shared | 24 GB |

| Memory Type | System Shared | GDDR6 |

| Memory Bus Width | System Shared | 192 bit |

| Memory Bandwidth | System Dependent | 300.1 GB/s |

| Shading Units | 128 | 7424 |

| TMUs | 8 | 240 |

| ROPs | 4 | 80 |

| RT Cores | 2 | 60 |

| Tensor Cores | None | 240 |

| Pixel Rate | 11.20 GPixel/s | 163.2 GPixel/s |

| Texture Rate | 22.40 GTexel/s | 489.6 GTexel/s |

| FP32 Performance | 716.8 GFLOPS | 30.29 TFLOPS |

| FP16 Performance | 716.8 GFLOPS (1:1) | 30.29 TFLOPS (1:1) |

| TDP | 15 W | 72 W |

| Slot Width | IGP | Single-slot |

| Power Connectors | None | None |

| Suggested PSU | Not recorded | 250 W |

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

| Display Outputs | Portable Device Dependent | No outputs |

| Release Date | 2025-02-28 | 2023-03-20 |

| Predecessor | Navi II IGP | Server Ampere |

| Successor | None | Server Hopper |

| Dimensions | Not recorded | 169 mm length, 56 mm height |

| Percentile vs All GPUs | 50 | 95 |

| Average Benchmark Score | 0 | 131,072 |

The Verdict

The database presents a clear division of purpose between these two products. The AMD Radeon 820M, with its 4 nm RDNA 3.5 architecture and 15 W TDP, exists to provide basic graphics capability inside portable devices. Its 128 shading units and system-shared memory indicate a design optimized for power efficiency rather than raw throughput. The absence of benchmark scores in the database means its real-world performance remains unquantified, but its specification profile suggests it handles everyday graphics workloads within the constraints of mobile hardware.

The NVIDIA L4 occupies a different segment entirely. Its 95th percentile ranking among all tracked GPUs, supported by an average score of 131,072, places it among the top performers in the database. The 24 GB GDDR6 memory configuration, 240 tensor cores, and 30.29 TFLOPS FP32 performance target server-side compute tasks such as AI inference and data center rendering. The L4's lack of display outputs confirms its headless server role, and its 72 W TDP with no power connectors enables dense deployment in accelerator racks.

Anyone selecting between these GPUs faces a choice dictated by system form factor rather than performance preference. The Radeon 820M cannot be installed in a server slot, and the L4 cannot serve as an integrated GPU in a portable device. The former suits lightweight laptops and compact systems where power draw must stay minimal. The latter suits rack-mounted servers requiring dedicated memory bandwidth and high compute throughput. The recorded data shows no overlap in their target environments.

The L4's benchmark results place it within a narrow performance band shared by the GeForce RTX 3090 Ti, RTX 4000 Ada Generation, A10M, and Radeon PRO W6800, with deltas ranging from 0.7% to 3.2%. This clustering indicates that the L4 delivers compute performance comparable to several established workstation and server accelerators. The Radeon 820M, lacking any benchmark scores, cannot be positioned relative to these products in the database.

For workloads demanding maximum compute density in a server context, the L4's recorded measurements demonstrate strong capability. For integrated graphics in power-sensitive mobile devices, the Radeon 820M's specifications define a functional but modest solution. The database contains no evidence that the Radeon 820M competes with the L4 in any performance metric, and the architectural differences confirm they serve separate markets.