AMD Radeon 820M vs NVIDIA GeForce RTX 5080 Mobile Comparison

FAQ

Q: What are the architectural generations of these two GPUs?

A: The AMD Radeon 820M uses the RDNA 3.5 architecture from the Navi III IGP (Strix Point Mobile) generation, built on a 4 nm process at TSMC. The NVIDIA GeForce RTX 5080 Mobile uses the Blackwell 2.0 architecture from the GeForce 50 Mobile generation, built on a 5 nm process at TSMC.

Q: What memory configurations do the two GPUs use?

A: The AMD Radeon 820M relies on System Shared memory, with bandwidth described as System Dependent. The NVIDIA GeForce RTX 5080 Mobile has 16 GB of GDDR7 memory on a 256 bit bus, delivering 896.0 GB/s of bandwidth.

Q: How do the shading unit counts compare?

A: The AMD Radeon 820M has 128 shading units. The NVIDIA GeForce RTX 5080 Mobile has 7680 shading units, which is 60 times higher.

Q: What is the difference in pixel fill rate?

A: The AMD Radeon 820M delivers 11.20 GPixel/s. The NVIDIA GeForce RTX 5080 Mobile delivers 144.0 GPixel/s, which is over 12 times higher.

Q: Which GPU has a higher percentile ranking among all GPUs?

A: The AMD Radeon 820M sits at the 50th percentile. The NVIDIA GeForce RTX 5080 Mobile ranks at the 81st percentile, placing it well above the midpoint of the database.

Q: What is the average benchmark score for each GPU?

A: The AMD Radeon 820M has an average benchmark score of 0 (no recorded benchmarks). The NVIDIA GeForce RTX 5080 Mobile has an average benchmark score of 38349.

Architecture Differences

The two GPUs represent fundamentally different design philosophies. The AMD Radeon 820M is an integrated graphics processor (IGP) using the Krackan Point 2 chip, built on TSMC's 4 nm process. It belongs to the Navi III IGP family, specifically the Strix Point Mobile generation, and uses the RDNA 3.5 architecture. The NVIDIA GeForce RTX 5080 Mobile is a discrete-class mobile GPU using the GB203 chip, built on TSMC's 5 nm process, and belongs to the GeForce 50 Mobile generation with the Blackwell 2.0 architecture.

The transistor counts differ drastically. The AMD part does not disclose transistor count or die size in the database. The NVIDIA chip contains 45,600 million transistors on a 378 mm² die, yielding a transistor density of 120.6M per mm². This scale difference directly informs the performance gap.

Memory architecture separates the two clearly. The AMD Radeon 820M uses System Shared memory with a System Shared bus width and System Dependent bandwidth, meaning its memory performance is tied to the host system. The RTX 5080 Mobile uses dedicated 16 GB GDDR7 memory on a 256 bit bus with 896.0 GB/s bandwidth. The dedicated memory subsystem provides consistent, high-bandwidth access that the shared-memory IGP cannot match.

The execution resources differ by an order of magnitude. The AMD GPU has 128 shading units, 8 texture mapping units (TMUs), and 4 raster operation units (ROPs). It also includes 2 ray tracing cores but no tensor cores. The NVIDIA GPU has 7680 shading units, 240 TMUs, 96 ROPs, 60 ray tracing cores, and 240 tensor cores. The tensor core count is particularly significant for AI workloads, while the ray tracing core count supports hardware-accelerated ray tracing.

Clock behavior also differs. The AMD Radeon 820M runs at a 400 MHz base clock and boosts to 2800 MHz. The NVIDIA RTX 5080 Mobile runs at a 975 MHz base clock and boosts to 1500 MHz. Despite the lower boost clock, the NVIDIA GPU achieves far higher throughput due to its massive shader count.

The power envelopes are very different. The AMD IGP has a TDP of 15 W. The NVIDIA mobile GPU has a TDP of 80 W. Both are listed as IGP slot width with no power connectors, and both use Portable Device Dependent display outputs. The bus interface differs: PCIe 4.0 x8 for AMD versus PCIe 5.0 x16 for NVIDIA.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API feature parity is complete. The production status for both is Active. The AMD part was released on 2025-02-28, and the NVIDIA part on 2025-04-01.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark comparisons between the AMD Radeon 820M and the NVIDIA GeForce RTX 5080 Mobile. The AMD part has no recorded benchmark scores at all, with an average benchmark score of 0. The NVIDIA GPU, by contrast, has ten recorded benchmark entries across multiple test suites.

The RTX 5080 Mobile delivers strong results across compute and graphics tests. In 3DMark Steel Nomad DX12, it scores 4952. In Geekbench OpenCL, it scores 166986, and in Geekbench Vulkan, it scores 169754. PassMark results show 27711 in G3D, 12134 in GPU Compute, 1095 in G2D, and lower scores in legacy DirectX tests: 314 in DirectX 9, 253 in DirectX 11, 171 in DirectX 10, and 116 in DirectX 12.

The absence of AMD benchmark data means no direct percentage comparisons can be made between the two parts. However, the NVIDIA GPU's nearest rivals provide context for its positioning. The RTX 5080 Mobile's average score of 38349 is nearly identical to the NVIDIA GeForce MX570, which averages 38299 with a delta of 0.1%. It is also 0.6% ahead of the NVIDIA GeForce RTX 4080 Mobile, which averages 38135. The AMD Radeon Pro 580X averages 38706, putting the RTX 5080 Mobile 0.9% behind it, and the NVIDIA GeForce MX570 A averages 38691, also 0.9% ahead of the RTX 5080 Mobile.

These deltas indicate that the RTX 5080 Mobile sits in a tight cluster of high-performance mobile GPUs. The 0.1% and 0.6% gaps against the MX570 and RTX 4080 Mobile respectively are within normal run-to-run variance. The 0.9% deficits against the AMD Radeon Pro 580X and MX570 A are similarly small.

Given that the AMD Radeon 820M has no benchmark scores, the recorded data cannot quantify its performance against the RTX 5080 Mobile. The percentile rankings provide the only comparative signal: the AMD part sits at the 50th percentile, while the NVIDIA part sits at the 81st percentile. This 31-percentile gap places the RTX 5080 Mobile in the upper tier of all GPUs in the database, while the Radeon 820M sits exactly at the median.

The Verdict

The recorded data shows a clear performance hierarchy. The NVIDIA GeForce RTX 5080 Mobile delivers benchmark scores across all ten recorded tests, with an average of 38349 and an 81st percentile ranking. The AMD Radeon 820M has no recorded benchmarks and an average score of 0, placing it at the 50th percentile.

For users selecting between these two, the choice depends on the workload and system context. The Radeon 820M is an integrated GPU with a 15 W TDP, using system-shared memory, and is designed for portable devices where power efficiency and minimal footprint take priority. Its 128 shading units and 2 ray tracing cores provide basic graphics capability for light tasks.

The RTX 5080 Mobile targets demanding mobile workloads. Its 7680 shading units, 240 tensor cores, 60 ray tracing cores, and 16 GB of GDDR7 memory with 896.0 GB/s bandwidth position it for high-end gaming, content creation, and compute tasks. The 80 W TDP reflects the higher power requirement for this performance class.

The data does not support any direct head-to-head comparison because the AMD part lacks benchmark entries. The percentile difference, however, indicates that the RTX 5080 Mobile occupies a higher performance stratum. The 81st percentile puts it among the top fifth of all GPUs in the database, while the 50th percentile for the Radeon 820M indicates median performance.

The RTX 5080 Mobile also benefits from its nearest-rival comparisons. Its average score of 38349 is within 1% of the MX570, RTX 4080 Mobile, MX570 A, and Radeon Pro 580X, confirming that it performs at the level of established high-end mobile GPUs.

For users who need dedicated memory bandwidth and high compute throughput, the RTX 5080 Mobile is the clear choice based on the recorded data. For users who need an integrated solution with minimal power draw and no dedicated memory requirement, the Radeon 820M fits that profile. The choice is not about which GPU is better in absolute terms, but which matches the system design and workload requirements.

Specification Differences

The two GPUs differ across nearly every specification field in the database.

Process and chip: AMD uses a 4 nm process with the Krackan Point 2 chip. NVIDIA uses a 5 nm process with the GB203 chip.

Transistors and die size: AMD lists these as unknown. NVIDIA has 45,600 million transistors on a 378 mm² die with a density of 120.6M per mm².

Clocks: AMD has a 400 MHz base clock and 2800 MHz boost clock. NVIDIA has a 975 MHz base clock and 1500 MHz boost clock. The memory clock for NVIDIA is 1750 MHz (28 Gbps effective); AMD uses System Shared memory.

Memory: AMD uses System Shared size, type, bus width, and bandwidth (System Dependent). NVIDIA uses 16 GB GDDR7 on a 256 bit bus with 896.0 GB/s bandwidth.

Execution units: AMD has 128 shading units, 8 TMUs, 4 ROPs, and 2 ray tracing cores. NVIDIA has 7680 shading units, 240 TMUs, 96 ROPs, 60 ray tracing cores, and 240 tensor cores.

Rates: AMD delivers 11.20 GPixel/s pixel rate, 22.40 GTexel/s texture rate, 716.8 GFLOPS FP32, and 716.8 GFLOPS FP16 (1:1). NVIDIA delivers 144.0 GPixel/s pixel rate, 360.0 GTexel/s texture rate, 23.04 TFLOPS FP32, and 23.04 TFLOPS FP16 (1:1).

Power and interface: AMD has a 15 W TDP and PCIe 4.0 x8 interface. NVIDIA has an 80 W TDP and PCIe 5.0 x16 interface. Both use IGP slot width, no power connectors, and Portable Device Dependent display outputs.

API support: Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release dates: AMD released on 2025-02-28. NVIDIA released on 2025-04-01. Both are Active in production status.