AMD Instinct MI300A vs NVIDIA GeForce RTX 5080 Mobile Comparison

Where Each One Wins

The benchmark data splits these two accelerators into completely separate use cases. The AMD Instinct MI300A is a datacenter compute module with no display outputs, no graphics API support, and no recorded benchmark scores in the database. Its entire profile is built around raw compute throughput, massive memory capacity, and high-bandwidth HBM3 storage. The NVIDIA GeForce RTX 5080 Mobile, by contrast, is an active laptop GPU with a full suite of graphics APIs, DirectX 12 Ultimate support, and a substantial set of recorded benchmark results.

In terms of measured performance, only the RTX 5080 Mobile has data to analyze. Its percentile ranking sits at 81 across all GPUs in the database, with an average benchmark score of 38,349. The nearest rivals show a tight cluster: the NVIDIA GeForce MX570 scores 38,299 (0.1% behind), the NVIDIA GeForce RTX 4080 Mobile scores 38,135 (0.6% behind), the NVIDIA GeForce MX570 A scores 38,691 (0.9% ahead), and the AMD Radeon Pro 580X scores 38,706 (0.9% ahead). This indicates the RTX 5080 Mobile sits in a very competitive mid-range band, within roughly one percent of four other GPUs.

The MI300A has no benchmark entries, no wins, and no rival comparisons in the database. Its percentile of 50 reflects a placeholder position rather than measured performance. The data cannot support any claim of superiority for the MI300A in gaming, graphics, or general compute workloads because no such measurements exist. What the data does show is a stark architectural split: the MI300A targets memory-bound datacenter workloads, while the RTX 5080 Mobile targets portable graphics and compute tasks.

Architecture Differences

The two chips come from different design philosophies. The MI300A uses the CDNA 3.0 architecture on a 5 nm TSMC process, with the chip codenamed Aqua Vanjaram. It packs 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per mm². The RTX 5080 Mobile uses the Blackwell 2.0 architecture, also on 5 nm TSMC, with the GB203 chip. It contains 45,600 million transistors on a 378 mm² die, for a density of 120.6 million per mm².

The compute resources differ dramatically. The MI300A has 14,592 shading units, 912 texture mapping units, and no raster operation pipelines (0 ROPs). The RTX 5080 Mobile has 7,680 shading units, 240 TMUs, and 96 ROPs. The MI300A lists no ray tracing cores or tensor cores in the database, while the RTX 5080 Mobile includes 60 ray tracing cores and 240 tensor cores. This makes the NVIDIA part explicitly designed for real-time graphics acceleration, including ray-traced workloads, while the AMD part appears to focus purely on compute throughput.

Clock speeds favor the MI300A in boost state. The AMD module runs at a 1000 MHz base and 2100 MHz boost. The NVIDIA GPU runs at 975 MHz base and 1500 MHz boost. Memory clocks also differ: the MI300A uses 1300 MHz with 5.2 Gbps effective transfer, while the RTX 5080 Mobile uses 1750 MHz with 28 Gbps effective.

The memory subsystem is where the gulf widens. The MI300A carries 128 GB of HBM3 on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RTX 5080 Mobile has 16 GB of GDDR7 on a 256-bit bus, providing 896.0 GB/s. That is a nearly 6x difference in memory capacity and a 5.9x difference in bandwidth, both favoring the AMD module.

Power and form factor reinforce the different target markets. The MI300A draws 750 W and mounts as an OAM module with no power connectors listed, requiring a suggested 1150 W power supply. The RTX 5080 Mobile draws 80 W and is an integrated graphics processor with no external power connectors, designed for portable devices. Both use PCIe 5.0 x16 interfaces, but the MI300A has no display outputs while the RTX 5080 Mobile's outputs are listed as portable device dependent.

Head-to-Head Benchmarks

Direct comparison is limited because the MI300A has no recorded benchmarks in the database. The head-to-head benchmark list is empty, and the win counts are zero for both parts. This means the data cannot show a single direct score comparison between these two products.

For the RTX 5080 Mobile alone, the recorded benchmarks provide a performance profile. In 3DMark Steel Nomad DX12, it scores 4,952. Geekbench OpenCL yields 166,986, and Geekbench Vulkan yields 169,754. Passmark results show 171 in DirectX 10, 253 in DirectX 11, 116 in DirectX 12, and 314 in DirectX 9. The 2D graphics score is 1,095, the 3D graphics score is 27,711, and the GPU compute score is 12,134. The average benchmark score across all entries is 38,349.

The nearest rival data places the RTX 5080 Mobile in a tightly contested group. The MX570 sits 0.1% behind, the RTX 4080 Mobile sits 0.6% behind, the MX570 A sits 0.9% ahead, and the Radeon Pro 580X sits 0.9% ahead. These deltas are small enough to be within measurement noise, indicating the RTX 5080 Mobile is statistically level with all four rivals in aggregate performance.

The MI300A's absence from the benchmark database means no texture rate or pixel rate comparisons can be made against the RTX 5080 Mobile. The MI300A lists a texture rate of 1,915.2 GTexel/s and a pixel rate of 0 MPixel/s, while the RTX 5080 Mobile lists 360.0 GTexel/s and 144.0 GPixel/s. The FP32 compute figures also diverge: 61.29 TFLOPS for the MI300A versus 23.04 TFLOPS for the RTX 5080 Mobile. The RTX 5080 Mobile additionally lists FP16 at 23.04 TFLOPS (1:1), while the MI300A has no FP16 entry.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI300A lists 61.29 TFLOPS FP32, which is 2.7x higher than the NVIDIA GeForce RTX 5080 Mobile's 23.04 TFLOPS.

Q: How much memory bandwidth does each chip provide?

A: The MI300A delivers 5.32 TB/s from 128 GB of HBM3 on an 8192-bit bus. The RTX 5080 Mobile delivers 896.0 GB/s from 16 GB of GDDR7 on a 256-bit bus.

Q: Which product supports ray tracing?

A: The RTX 5080 Mobile has 60 ray tracing cores and 240 tensor cores. The MI300A lists no ray tracing or tensor cores in the database.

Q: What graphics API support does each product offer?

A: The RTX 5080 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300A lists N/A for DirectX, OpenGL, and Vulkan.

Q: How does the RTX 5080 Mobile compare to its nearest rivals?

A: The database shows it within 0.9% of four rivals: the MX570 (0.1% behind), RTX 4080 Mobile (0.6% behind), MX570 A (0.9% ahead), and Radeon Pro 580X (0.9% ahead).

Q: What are the power requirements for each?

A: The MI300A has a 750 W TDP and suggests a 1150 W power supply. The RTX 5080 Mobile has an 80 W TDP and lists no suggested power supply.

The Verdict

The data supports a clear split. The AMD Instinct MI300A is a high-power datacenter compute module with enormous memory capacity, extreme bandwidth, and no graphics capabilities. Its 128 GB HBM3 pool and 5.32 TB/s bandwidth target workloads that require massive in-memory datasets, such as large-scale scientific computing or AI training. Its 61.29 TFLOPS FP32 figure exceeds the RTX 5080 Mobile by 2.7x, but without any benchmark scores or display support, it cannot be evaluated for interactive or graphics tasks.

The NVIDIA GeForce RTX 5080 Mobile is a low-power laptop GPU with full graphics API support, ray tracing hardware, and measured benchmark results. Its 80 W TDP makes it suitable for portable devices, and its 81st percentile ranking places it in the upper tier of all GPUs in the database. The recorded scores show balanced performance across DirectX versions, Vulkan, OpenCL, and compute workloads.

For users needing a datacenter compute accelerator with massive memory and no display output, the MI300A is the only option in this comparison. For users needing a mobile GPU with graphics, ray tracing, and measured performance, the RTX 5080 Mobile is the only option. The data does not present a head-to-head competition; it presents two products designed for entirely different environments.

Specification Differences

| Specification | AMD Instinct MI300A | NVIDIA GeForce RTX 5080 Mobile |

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

| Architecture | CDNA 3.0 | Blackwell 2.0 |

| Process Node | 5 nm | 5 nm |

| Foundry | TSMC | TSMC |

| Transistors | 153,000 million | 45,600 million |

| Die Size | 1017 mm² | 378 mm² |

| Transistor Density | 150.4M / mm² | 120.6M / mm² |

| Base Clock | 1000 MHz | 975 MHz |

| Boost Clock | 2100 MHz | 1500 MHz |

| Memory Clock | 1300 MHz (5.2 Gbps effective) | 1750 MHz (28 Gbps effective) |

| Memory Size | 128 GB | 16 GB |

| Memory Type | HBM3 | GDDR7 |

| Memory Bus Width | 8192 bit | 256 bit |

| Memory Bandwidth | 5.32 TB/s | 896.0 GB/s |

| Shading Units | 14,592 | 7,680 |

| TMUs | 912 | 240 |

| ROPs | 0 | 96 |

| RT Cores | None listed | 60 |

| Tensor Cores | None listed | 240 |

| Pixel Rate | 0 MPixel/s | 144.0 GPixel/s |

| Texture Rate | 1,915.2 GTexel/s | 360.0 GTexel/s |

| FP32 | 61.29 TFLOPS | 23.04 TFLOPS |

| FP16 | Not listed | 23.04 TFLOPS (1:1) |

| TDP | 750 W | 80 W |

| Slot Width | OAM Module | IGP |

| Power Connectors | None | None |

| Suggested PSU | 1150 W | Not listed |

| Bus Interface | PCIe 5.0 x16 | PCIe 5.0 x16 |

| Display Outputs | No outputs | Portable Device Dependent |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Release Date | 2023-12-05 | 2025-04-01 |

| Production Status | Not listed | Active |