AMD Radeon 840M vs NVIDIA GeForce RTX 5080 Mobile Comparison

FAQ

Q: What is the AMD Radeon 840M?

A: The AMD Radeon 840M is an integrated graphics processor based on the RDNA 3.5 architecture, built on TSMC's 4 nm process. It uses the Krackan Point chip and belongs to the Navi III IGP generation. The database lists it as an active production part with a release date of February 28, 2025.

Q: What is the NVIDIA GeForce RTX 5080 Mobile?

A: The NVIDIA GeForce RTX 5080 Mobile is a discrete mobile GPU from the GeForce 50-series, based on the Blackwell 2.0 architecture and the GB203 chip. It is manufactured on a 5 nm process at TSMC, contains 45,600 million transistors on a 378 mm² die, and was released on April 1, 2025.

Q: How do the two GPUs compare in terms of memory?

A: The RTX 5080 Mobile has 16 GB of GDDR7 memory on a 256-bit bus, delivering 896.0 GB/s of bandwidth. The Radeon 840M uses system-shared memory, with a bus width and type listed as system shared, and bandwidth described as system dependent.

Q: What is the performance percentile of each GPU?

A: The Radeon 840M sits at the 50th percentile among all GPUs in the database. The RTX 5080 Mobile sits at the 81st percentile, placing it well above the median and near the top of the recorded performance distribution.

Q: What are the thermal design power ratings?

A: The Radeon 840M has a 15 W TDP, while the RTX 5080 Mobile has an 80 W TDP. Both are listed with an IGP slot width and no power connectors, reflecting their mobile-oriented design.

Q: Which GPU has a higher average benchmark score?

A: The RTX 5080 Mobile has an average benchmark score of 38,349 across its recorded tests. The Radeon 840M has an average benchmark score of 0 in the database, meaning no benchmark entries are recorded for it.

The Verdict

The data presents a clear separation in capability. The RTX 5080 Mobile is the dominant part in raw compute and graphics throughput, while the Radeon 840M is a low-power integrated solution with no recorded benchmark results. The RTX 5080 Mobile's 81st percentile ranking versus the 840M's 50th percentile ranking confirms the gap in overall performance.

The RTX 5080 Mobile is the choice for any workload that demands high frame rates, compute throughput, or ray tracing performance. Its 23.04 TFLOPS FP32 throughput, 60 ray tracing cores, and 240 tensor cores place it in a different class entirely. The Radeon 840M, with 1,484.8 GFLOPS FP32, 4 ray tracing cores, and no tensor cores, is suited for basic integrated graphics duties in a thin-and-light portable system.

The Radeon 840M is the appropriate pick for systems where power draw is the primary constraint. Its 15 W TDP is a fraction of the 80 W TDP of the RTX 5080 Mobile. The 840M also uses shared system memory, which eliminates the cost and space of dedicated VRAM. The RTX 5080 Mobile requires 16 GB of dedicated GDDR7 and a 256-bit memory bus, which points to a larger, more power-hungry laptop design.

The nearest rivals to the RTX 5080 Mobile in the database are close in score. The NVIDIA GeForce MX570 is 0.1% faster, the RTX 4080 Mobile is 0.6% slower, the MX570 A is 0.9% faster, and the AMD Radeon Pro 580X is 0.9% faster. These deltas are small enough that the RTX 5080 Mobile should be considered statistically similar to those parts in average score, while the Radeon 840M has no comparable benchmark data to place it in that range.

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark comparisons between the Radeon 840M and the RTX 5080 Mobile. The wins tally is 0 for both parts in the head-to-head table. However, the RTX 5080 Mobile has its own benchmark entries, and those provide the only concrete performance numbers in this comparison.

The RTX 5080 Mobile scores 4,952 in the 3DMark Steel Nomad DX12 test. Its Geekbench OpenCL score is 166,986, and its Geekbench Vulkan score is 169,754. These are substantial figures for a mobile GPU and place it firmly in the high-performance segment.

The PassMark suite shows the RTX 5080 Mobile delivering 27,711 in G3D, 1,095 in G2D, and 12,134 in GPU compute. The legacy DirectX tests record 314 in DirectX 9, 253 in DirectX 11, 171 in DirectX 10, and 116 in DirectX 12. The low DirectX 12 PassMark score relative to the 3DMark Steel Nomad result suggests the PassMark DX12 test may not scale the same way as the 3DMark workload, but the overall average of 38,349 confirms the GPU's high standing.

The Radeon 840M has no recorded benchmark scores. Its FP32 rate of 1,484.8 GFLOPS is roughly 1/15.5 of the RTX 5080 Mobile's 23.04 TFLOPS, which gives a rough ratio of the compute difference even without direct test results. Its pixel rate of 23.20 GPixel/s and texture rate of 46.40 GTexel/s compare to 144.0 GPixel/s and 360.0 GTexel/s for the RTX 5080 Mobile. These fillrate figures indicate the RTX 5080 Mobile is about 6.2 times faster in pixel throughput and 7.8 times faster in texture throughput.

Specification Differences

The two GPUs differ across nearly every specification field. The Radeon 840M uses a 4 nm TSMC process, while the RTX 5080 Mobile uses a 5 nm TSMC process. The RTX 5080 Mobile has 45,600 million transistors on a 378 mm² die, with a transistor density of 120.6 million per mm². The 840M lists transistor count and die size as unknown.

Clock speeds differ sharply. The 840M has a base clock of 400 MHz and a boost clock of 2,900 MHz. The RTX 5080 Mobile has a base clock of 975 MHz and a boost clock of 1,500 MHz. The 840M boosts much higher but starts much lower, which reflects its power-constrained integrated design. The RTX 5080 Mobile runs lower clocks but with far more execution units.

The compute unit counts show the scale difference. The 840M has 256 shading units, 16 TMUs, and 8 ROPs. The RTX 5080 Mobile has 7,680 shading units, 240 TMUs, and 96 ROPs. That is 30 times more shading units, 15 times more TMUs, and 12 times more ROPs. The RTX 5080 Mobile also has 60 ray tracing cores and 240 tensor cores, while the 840M has 4 ray tracing cores and no tensor cores.

Memory capacity and bandwidth differ completely. The 840M uses system-shared memory with a system-dependent bandwidth. The RTX 5080 Mobile has 16 GB of GDDR7 on a 256-bit bus with 896.0 GB/s bandwidth and a memory clock of 1,750 MHz, 28 Gbps effective. The bus interface also differs: PCIe 4.0 x8 for the 840M versus PCIe 5.0 x16 for the RTX 5080 Mobile.

The TDP difference is 15 W versus 80 W. Both are listed as IGP slot width with no power connectors, and both have portable-device-dependent display outputs. The RTX 5080 Mobile lists an average benchmark score of 38,349 and an 81st percentile ranking; the 840M lists no benchmarks and a 50th percentile ranking.

Architecture Differences

The Radeon 840M uses AMD's RDNA 3.5 architecture on the Krackan Point chip, part of the Navi III IGP generation. The RTX 5080 Mobile uses NVIDIA's Blackwell 2.0 architecture on the GB203 chip, part of the GeForce 50 Mobile generation. The predecessor names differ as well: the 840M follows the Navi II IGP, while the RTX 5080 Mobile follows the GeForce 40 Mobile.

The process nodes differ: the 840M is on 4 nm, the RTX 5080 Mobile on 5 nm, both at TSMC. Despite the finer node, the 840M is a much smaller design with unknown transistor count, while the RTX 5080 Mobile packs 45,600 million transistors into 378 mm². The 840M's design goal is low power with modest throughput; the RTX 5080 Mobile's is maximum mobile performance.

Ray tracing hardware differs in scale. The 840M has 4 ray tracing cores, which supports basic RT workloads at low resolution and low settings. The RTX 5080 Mobile has 60 ray tracing cores, 15 times more, which allows far heavier ray tracing loads. Tensor core availability also separates them: the RTX 5080 Mobile has 240 tensor cores for AI and compute acceleration, while the 840M has none.

FP16 throughput is 1:1 with FP32 on both parts. The 840M delivers 1,484.8 GFLOPS in both FP32 and FP16. The RTX 5080 Mobile delivers 23.04 TFLOPS in both. The API support is identical: both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Both are active production parts with no successors listed.

The memory architecture is a fundamental difference. The 840M relies on system-shared memory, making its bandwidth dependent on the host system's memory configuration. The RTX 5080 Mobile has dedicated GDDR7 with a fixed 896.0 GB/s bandwidth, which removes the variable of system memory speed from its performance profile.

Where Each One Wins

The RTX 5080 Mobile wins in every measurable performance category in the database. Its 23.04 TFLOPS FP32 throughput is the headline compute figure. Its 144.0 GPixel/s pixel rate and 360.0 GTexel/s texture rate dwarf the 840M's 23.20 GPixel/s and 46.40 GTexel/s. Its 16 GB of GDDR7 at 896.0 GB/s removes any memory bandwidth bottleneck, while the 840M's system-shared memory leaves bandwidth entirely dependent on the host platform.

The RTX 5080 Mobile also wins on feature set. Its 60 ray tracing cores and 240 tensor cores enable hardware-accelerated ray tracing and AI workloads that the 840M cannot match with 4 ray tracing cores and no tensor cores. The 81st percentile ranking reflects this capability, and its nearest rivals all sit within about 1% of its average score, confirming it is a high-end mobile part.

The Radeon 840M wins on power efficiency and integration. At 15 W TDP, it draws 18.75% of the power of the RTX 5080 Mobile's 80 W TDP. It requires no dedicated memory, no power connectors, and uses a PCIe 4.0 x8 interface instead of the PCIe 5.0 x16 interface of the RTX 5080 Mobile. For a compact, fanless or low-cooling portable device, the 840M is the only viable option of the two.

The 840M also wins on boost clock speed. Its 2,900 MHz boost is nearly double the 1,500 MHz boost of the RTX 5080 Mobile. This high clock partially compensates for its low execution unit count in lightly threaded or latency-sensitive tasks, though the massive unit count difference means the RTX 5080 Mobile still dominates throughput-bound workloads.

The use-case split is straightforward. The RTX 5080 Mobile is for gaming laptops and mobile workstations that need high frame rates, ray tracing, and compute acceleration. The Radeon 840M is for ultraportable laptops where 15 W power draw and shared memory are acceptable, and where the workload is limited to basic 2D graphics and light 3D rendering. The database records no benchmark wins for the 840M, so its advantage is purely in power, integration, and boost clock, not in measured performance.