AMD Radeon 820M vs NVIDIA RTX 4000 Mobile Ada Generation Comparison

AMD Radeon 820M and NVIDIA RTX 4000 Mobile Ada Generation occupy different ends of the mobile graphics spectrum, yet both are listed as active products in the database. The Radeon 820M is an integrated graphics processor built on the RDNA 3.5 architecture, while the RTX 4000 Mobile Ada Generation is a dedicated mobile workstation GPU using the Ada Lovelace design. The recorded specifications reveal a substantial gap in compute resources, memory bandwidth, and clock behavior, which directly influences their benchmark positioning. This analysis compares the two based on the available data, focusing on their architectural foundations, performance characteristics, and the implications of those differences.

Head-to-Head Benchmarks

The database does not contain direct head-to-head benchmark results for these two products, as the headToHeadBenchmarks array is empty. However, the specification data provides a basis for calculating expected performance deltas across several metrics. The most striking difference appears in raw compute throughput. The RTX 4000 Mobile Ada Generation delivers 24.72 TFLOPS of FP32 performance, while the AMD Radeon 820M produces 716.8 GFLOPS. Converting these figures yields a ratio where the NVIDIA part is approximately 34.5 times faster in single-precision floating-point operations. This is not a marginal advantage; it is a different performance class entirely.

Pixel throughput tells a similar story. The RTX 4000 Mobile achieves 133.2 GPixel/s, whereas the Radeon 820M manages 11.20 GPixel/s. The NVIDIA GPU is roughly 11.9 times faster in pixel fill rate. Texture rate comparisons show the RTX 4000 Mobile at 386.3 GTexel/s against the Radeon 820M’s 22.40 GTexel/s, a multiplier of about 17.2. These ratios align with the massive disparity in execution resources: the RTX 4000 Mobile has 7424 shading units, 232 texture mapping units, and 80 render output units, compared to 128, 8, and 4 respectively on the Radeon 820M.

Clock speeds introduce a nuance. The AMD part has a base clock of 400 MHz and a boost clock of 2800 MHz, while the NVIDIA GPU runs at 1290 MHz base and 1665 MHz boost. The Radeon 820M’s boost clock is substantially higher, but its much smaller execution width means that higher frequency cannot compensate for the lack of hardware. The RTX 4000 Mobile also benefits from a dedicated memory subsystem with 12 GB of GDDR6 on a 192-bit bus, delivering 432.0 GB/s of bandwidth. The Radeon 820M uses system shared memory with bandwidth described as system dependent, which places it at a structural disadvantage in memory-intensive workloads.

In ray tracing, the RTX 4000 Mobile includes 58 RT cores, while the Radeon 820M has 2 RT cores. Tensor operations show an even wider gap: the NVIDIA part has 232 tensor cores, and the AMD part lists none. Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API-level feature parity exists, but the hardware capabilities behind those APIs differ enormously.

Where Each One Wins

The AMD Radeon 820M holds advantages in power efficiency and physical integration. Its TDP is 15 W, compared to 110 W for the RTX 4000 Mobile Ada Generation. For thin-and-light portable devices where thermal and power budgets are constrained, the Radeon 820M is the only viable option between these two. Its 4 nm process node, manufactured by TSMC, is denser than the 5 nm node used for the NVIDIA chip, which contributes to lower power draw. The Radeon 820M also carries no power connectors, matching the RTX 4000 Mobile in that regard, but its integrated nature means it does not require a separate cooling solution beyond what the system provides.

The Radeon 820M’s boost clock of 2800 MHz is notably higher than the RTX 4000 Mobile’s 1665 MHz boost. For workloads that are latency-sensitive and scale with frequency rather than raw parallel throughput, this higher clock could provide a relative benefit, though the database does not include benchmark scores to confirm this. The Radeon 820M also uses system shared memory, which simplifies system design and reduces cost, though the database does not provide pricing data.

The NVIDIA RTX 4000 Mobile Ada Generation wins across every absolute performance metric recorded. Its FP32 throughput of 24.72 TFLOPS dwarfs the Radeon 820M’s 716.8 GFLOPS. The 12 GB of dedicated GDDR6 memory with 432.0 GB/s bandwidth enables large dataset handling and high-bandwidth operations that system shared memory cannot match. The 7424 shading units provide massive parallel processing capability for compute-intensive tasks such as rendering, simulation, and machine learning inference. The presence of 58 RT cores and 232 tensor cores gives it specialized hardware for ray-traced graphics and AI-accelerated workloads, which the Radeon 820M lacks entirely on the tensor side and nearly so on the ray tracing side.

The RTX 4000 Mobile also has a faster pixel rate (133.2 GPixel/s versus 11.20 GPixel/s) and texture rate (386.3 GTexel/s versus 22.40 GTexel/s). Its memory clock of 2250 MHz with 18 Gbps effective speed, while not directly comparable to the AMD part’s system shared memory, indicates a dedicated high-speed memory design. The RTX 4000 Mobile uses a PCIe 4.0 x16 interface, double the lane width of the Radeon 820M’s PCIe 4.0 x8, which affects data transfer rates between the GPU and host system.

Architecture Differences

The architectural gap between these two GPUs is fundamental. The AMD Radeon 820M uses RDNA 3.5, built on a 4 nm TSMC process. It belongs to the Navi III IGP generation, specifically the Strix Point Mobile line, and its chip is designated Krackan Point 2. The RTX 4000 Mobile Ada Generation uses the Ada Lovelace architecture, fabricated on a 5 nm TSMC process, with the AD104 chip. The NVIDIA part is part of the GeForce 40-series and the Ada-MW generation, succeeding the Ampere-MW line and preceding Blackwell-MW.

Transistor counts and die size are only recorded for the NVIDIA GPU. The RTX 4000 Mobile has 35,800 million transistors on a 294 mm² die, yielding a transistor density of 121.8 million per square millimeter. The AMD part’s transistor count and die size are unknown in the database. This difference in process node (4 nm versus 5 nm) suggests that the AMD chip is fabricated on a more advanced process, but the absence of transistor data prevents a direct density comparison.

Execution resources differ by an order of magnitude. The Radeon 820M has 128 shading units, 8 TMUs, and 4 ROPs. The RTX 4000 Mobile has 7424 shading units, 232 TMUs, and 80 ROPs. Ray tracing hardware: 2 RT cores on the AMD part versus 58 on the NVIDIA part. Tensor cores: none listed for AMD, 232 for NVIDIA. These numbers indicate that the RTX 4000 Mobile is designed for high-end workstation tasks, while the Radeon 820M targets basic graphics and light compute within an integrated package.

Memory architecture is also divergent. The Radeon 820M uses system shared memory for both size and type, with a system shared bus width and system dependent bandwidth. The RTX 4000 Mobile has 12 GB of GDDR6 on a 192-bit bus with a fixed bandwidth of 432.0 GB/s. The NVIDIA memory clock is 2250 MHz with 18 Gbps effective transfer rate. This dedicated memory configuration provides predictable performance, whereas the AMD part’s bandwidth varies with the host system’s memory configuration.

Both GPUs support the same API set: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The FP16 to FP32 ratio is 1:1 on both parts, meaning they process half-precision at the same throughput as single-precision. The RTX 4000 Mobile’s FP16 output is 24.72 TFLOPS, while the Radeon 820M’s is 716.8 GFLOPS. Power delivery differs: the Radeon 820M has a 15 W TDP, the RTX 4000 Mobile has a 110 W TDP, and both list no power connectors and an IGP slot width, though the RTX 4000 Mobile is clearly a larger, more power-hungry component in practice based on its TDP.

The release dates show a two-year gap. The RTX 4000 Mobile Ada Generation was released on 2023-03-20, while the AMD Radeon 820M became available on 2025-02-28. The production status for both is active, meaning neither has been discontinued. The bus interface differs: PCIe 4.0 x8 for AMD versus PCIe 4.0 x16 for NVIDIA. Display outputs for both are listed as portable device dependent, indicating that connectivity varies by laptop implementation.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA RTX 4000 Mobile Ada Generation delivers 24.72 TFLOPS of FP32 performance, while the AMD Radeon 820M provides 716.8 GFLOPS. This makes the NVIDIA part approximately 34.5 times faster in single-precision compute.

Q: How do their power requirements compare?

A: The AMD Radeon 820M has a TDP of 15 W, while the NVIDIA RTX 4000 Mobile Ada Generation has a TDP of 110 W. The AMD part is designed for low-power integrated use, whereas the NVIDIA part requires a substantially larger power budget.

Q: Do both GPUs support the same DirectX version?

A: Yes, both support DirectX 12 Ultimate (12_2). They also both support OpenGL 4.6 and Vulkan 1.4. The API feature set is identical, but the hardware execution capabilities differ significantly.

Q: What memory configurations do they use?

A: The AMD Radeon 820M uses system shared memory with system dependent bandwidth. The NVIDIA RTX 4000 Mobile has 12 GB of GDDR6 memory on a 192-bit bus with 432.0 GB/s bandwidth and an 18 Gbps effective memory speed.

Q: How many ray tracing cores does each have?

A: The AMD Radeon 820M has 2 RT cores. The NVIDIA RTX 4000 Mobile Ada Generation has 58 RT cores. The NVIDIA part also includes 232 tensor cores, while the AMD part lists no tensor cores.

Q: Which GPU was released earlier?

A: The NVIDIA RTX 4000 Mobile Ada Generation was released on 2023-03-20. The AMD Radeon 820M was released on 2025-02-28, approximately two years later.

Specification Differences

The following fields differ between the two products according to the database:

• Manufacturer: AMD versus NVIDIA
• Series: None listed for AMD, GeForce 40-series for NVIDIA
• Chip: Krackan Point 2 versus AD104
• Architecture: RDNA 3.5 versus Ada Lovelace
• Generation: Navi III IGP (Strix Point Mobile) versus Ada-MW
• Process Node: 4 nm versus 5 nm
• Transistors: Unknown versus 35,800 million
• Die Size: Unknown versus 294 mm²
• Transistor Density: Not listed versus 121.8M per mm²
• Base Clock: 400 MHz versus 1290 MHz
• Boost Clock: 2800 MHz versus 1665 MHz
• Memory Clock: System Shared versus 2250 MHz with 18 Gbps effective
• Memory Size: System Shared versus 12 GB
• Memory Type: System Shared versus GDDR6
• Memory Bus Width: System Shared versus 192 bit
• Memory Bandwidth: System Dependent versus 432.0 GB/s
• Shading Units: 128 versus 7424
• TMUs: 8 versus 232
• ROPs: 4 versus 80
• RT Cores: 2 versus 58
• Tensor Cores: None listed versus 232
• Pixel Rate: 11.20 GPixel/s versus 133.2 GPixel/s
• Texture Rate: 22.40 GTexel/s versus 386.3 GTexel/s
• FP32 Performance: 716.8 GFLOPS versus 24.72 TFLOPS
• FP16 Performance: 716.8 GFLOPS versus 24.72 TFLOPS
• TDP: 15 W versus 110 W
• Bus Interface: PCIe 4.0 x8 versus PCIe 4.0 x16
• Release Date: 2025-02-28 versus 2023-03-20
• Predecessor: Navi II IGP versus Ampere-MW
• Successor: None listed versus Blackwell-MW

Fields that are identical include the foundry (TSMC for both), slot width (IGP for both), power connectors (None for both), display outputs (portable device dependent for both), DirectX version (12 Ultimate 12_2), OpenGL version (4.6), Vulkan version (1.4), and production status (Active for both). The launch MSRP is not listed for either product, and neither has recorded benchmark scores or nearest rival data in the database.

The percentile versus all GPUs is 50 for both, but with zero average benchmark scores, this percentile carries no comparative weight. The absence of benchmark data means the performance ratios derived here come from the recorded clock and resource specifications, which provide a consistent picture of a large capability gap. The AMD Radeon 820M serves as an entry-level integrated solution with minimal power draw, while the NVIDIA RTX 4000 Mobile Ada Generation is a high-end dedicated GPU with massive compute, memory, and specialized hardware resources. The data does not support any scenario where the Radeon 820M outperforms the RTX 4000 Mobile in absolute throughput; its advantages are confined to power consumption, process node density, and boost clock frequency.