AMD Instinct MI308X vs NVIDIA GeForce RTX 5080 Mobile Comparison

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark runs between the AMD Instinct MI308X and the NVIDIA GeForce RTX 5080 Mobile. The MI308X carries no benchmark entries in our measurement set, while the RTX 5080 Mobile has a full suite of recorded scores. This makes a direct numerical comparison impossible; instead, the analysis must rely on the available specification data and the RTX 5080 Mobile's placement among its nearest rivals.

The RTX 5080 Mobile's recorded benchmark results show a wide spread across different test types. Its strongest showing appears in PassMark G3D with a score of 27,711, while the PassMark DirectX 12 test returns only 116 points. The Geekbench OpenCL score of 166,986 and Vulkan score of 169,754 indicate strong general-purpose compute performance. PassMark GPU Compute returns 12,134 points. These figures place the RTX 5080 Mobile at the 81st percentile among all GPUs in the database, with an average benchmark score of 38,349.

The nearest rival data for the RTX 5080 Mobile provides context for its performance tier. The NVIDIA GeForce MX570 sits just 0.1% ahead with an average score of 38,299, effectively a statistical tie. The NVIDIA GeForce RTX 4080 Mobile trails by 0.6% with 38,135 points. The NVIDIA GeForce MX570 A is 0.9% ahead at 38,691 points, and the AMD Radeon Pro 580X also sits 0.9% ahead at 38,706 points. All four rivals fall within a narrow 1.5% band, suggesting the RTX 5080 Mobile occupies a well-defined performance class rather than an outlier position.

The MI308X, by contrast, has an average benchmark score of zero and sits at the 50th percentile. This reflects the absence of recorded benchmarks rather than measured performance. The hardware specifications, however, indicate a fundamentally different performance envelope. The MI308X delivers 81.72 TFLOPS of FP32 compute, compared to 23.04 TFLOPS for the RTX 5080 Mobile. The texture rate of 2,553.6 GTexel/s versus 360.0 GTexel/s further underscores the gap in raw throughput.

FAQ

Q: Which GPU has higher FP32 compute throughput?

A: The AMD Instinct MI308X records 81.72 TFLOPS of FP32 performance, while the NVIDIA GeForce RTX 5080 Mobile records 23.04 TFLOPS. The MI308X delivers approximately 3.5 times the FP32 throughput based on these figures.

Q: What is the memory capacity difference?

A: The MI308X carries 192 GB of HBM3 memory across an 8192-bit bus, yielding 5.32 TB/s of bandwidth. The RTX 5080 Mobile uses 16 GB of GDDR7 memory on a 256-bit bus, with 896.0 GB/s of bandwidth. The MI308X offers 12 times the capacity and roughly 5.9 times the bandwidth.

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

A: The RTX 5080 Mobile's average benchmark score of 38,349 places it within 1% of four rivals: the MX570 (38,299, 0.1% ahead), RTX 4080 Mobile (38,135, 0.6% behind), MX570 A (38,691, 0.9% ahead), and Radeon Pro 580X (38,706, 0.9% ahead). All five GPUs cluster tightly together.

Q: Does the MI308X support graphics APIs?

A: The database lists DirectX, OpenGL, and Vulkan support as N/A for the MI308X. The RTX 5080 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What are the power consumption figures?

A: The MI308X has a TDP of 750 W with a suggested PSU of 1150 W. The RTX 5080 Mobile has a TDP of 80 W and no suggested PSU listed. The MI308X consumes 9.4 times the power of the mobile part.

Q: Which GPU has a higher transistor density?

A: The MI308X packs 153,000 million transistors into a 1017 mm² die, yielding 150.4 million transistors per square millimeter. The RTX 5080 Mobile uses 45,600 million transistors on a 378 mm² die, for 120.6 million per square millimeter. Both use a 5 nm TSMC process.

Where Each One Wins

The AMD Instinct MI308X wins decisively in every raw compute metric recorded in the database. Its FP32 and FP16 performance both sit at 81.72 TFLOPS, versus 23.04 TFLOPS for the RTX 5080 Mobile. The texture rate of 2,553.6 GTexel/s dwarfs the 360.0 GTexel/s of the NVIDIA part. Memory bandwidth tells a similar story: 5.32 TB/s against 896.0 GB/s. The MI308X also offers 19,456 shading units and 1,216 texture mapping units, compared to 7,680 and 240 respectively for the RTX 5080 Mobile.

The NVIDIA GeForce RTX 5080 Mobile wins in areas that matter for conventional graphics workloads. It has 96 ROPs delivering a pixel rate of 144.0 GPixel/s, while the MI308X records 0 ROPs and a 0 MPixel/s pixel rate. The RTX 5080 Mobile includes 60 ray tracing cores and 240 tensor cores, features entirely absent from the MI308X's specification sheet. It also supports the full DirectX 12 Ultimate feature set, OpenGL 4.6, and Vulkan 1.4, whereas the MI308X lists no graphics API support. The power envelope is another clear win: 80 W TDP for the mobile part, versus 750 W for the accelerator.

For benchmark presence, the RTX 5080 Mobile has ten recorded results across 3DMark Steel Nomad, Geekbench OpenCL and Vulkan, and multiple PassMark tests. The MI308X has none. The RTX 5080 Mobile also holds the 81st percentile ranking among all GPUs, while the MI308X sits at the 50th percentile due to no recorded scores.

Specification Differences

The two GPUs differ across nearly every recorded specification. The MI308X uses a 1017 mm² die with 153,000 million transistors; the RTX 5080 Mobile uses a 378 mm² die with 45,600 million transistors. Clock speeds differ substantially: the MI308X runs at 1000 MHz base and 2100 MHz boost, while the RTX 5080 Mobile runs at 975 MHz base and 1500 MHz boost. Memory clock also differs: 1300 MHz (5.2 Gbps effective) for the MI308X versus 1750 MHz (28 Gbps effective) for the RTX 5080 Mobile.

Memory configuration is fundamentally different. The MI308X uses 192 GB of HBM3 on an 8192-bit bus; the RTX 5080 Mobile uses 16 GB of GDDR7 on a 256-bit bus. The MI308X has 19,456 shading units and 1,216 TMUs, while the RTX 5080 Mobile has 7,680 shading units and 240 TMUs. The MI308X records zero ROPs, while the RTX 5080 Mobile has 96. Ray tracing cores and tensor cores exist only on the RTX 5080 Mobile: 60 and 240 respectively.

Power and physical specifications diverge sharply. The MI308X is an OAM module with a 750 W TDP and a suggested PSU of 1150 W. The RTX 5080 Mobile is an IGP (integrated graphics processor) with an 80 W TDP and no suggested PSU. Both use PCIe 5.0 x16. The RTX 5080 Mobile has display outputs described as "Portable Device Dependent," while the MI308X has no outputs. The MI308X has no power connectors listed; the RTX 5080 Mobile also lists none.

Architecture Differences

The MI308X is built on AMD's CDNA 3.0 architecture with the Aqua Vanjaram chip. The RTX 5080 Mobile uses NVIDIA's Blackwell 2.0 architecture with the GB203 chip. Both use a 5 nm process from TSMC, but the transistor density differs: 150.4 million per square millimeter for the MI308X, 120.6 million for the RTX 5080 Mobile.

The MI308X belongs to the Instinct (MIx) generation and the Radeon Instinct product lineage. The RTX 5080 Mobile belongs to the GeForce 50-series and GeForce 50 Mobile generation, succeeding the GeForce 40 Mobile line. Release dates in the database show the MI308X arriving on December 5, 2023, while the RTX 5080 Mobile appears on April 1, 2025. The RTX 5080 Mobile's production status is listed as Active; the MI308X has no production status recorded.

Feature sets reflect their different design goals. The MI308X has no ray tracing cores, no tensor cores, and no graphics API support, consistent with a compute accelerator. The RTX 5080 Mobile includes 60 ray tracing cores, 240 tensor cores, and full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support. The MI308X offers no display outputs; the RTX 5080 Mobile's outputs depend on the portable device it is integrated into.

The Verdict

The data describes two GPUs built for entirely different purposes. The AMD Instinct MI308X is a data center accelerator with 81.72 TFLOPS of FP32 compute, 192 GB of HBM3 memory, and 5.32 TB/s of bandwidth. Its 750 W TDP and OAM form factor, combined with no graphics API support and no display outputs, confirm its role as a server-side compute engine. The complete absence of benchmark scores in the database means its real-world performance cannot be verified through our measurements, but the specification sheet indicates a massive compute-oriented design.

The NVIDIA GeForce RTX 5080 Mobile is a laptop GPU with 23.04 TFLOPS of FP32 compute, 16 GB of GDDR7 memory, and 896.0 GB/s of bandwidth. Its 80 W TDP, IGP form factor, and portable-device-dependent display outputs align with mobile gaming and workstation use. The recorded benchmarks show it performing at the 81st percentile overall, with an average score of 38,349 that places it within 1% of four rival GPUs including the RTX 4080 Mobile and MX570 variants.

For compute density in a data center context, the MI308X is the clear choice based on raw specifications. For any workload requiring graphics rendering, ray tracing, tensor operations, or standard API compatibility, the RTX 5080 Mobile is the only option with the necessary features. The pixel rate of 144.0 GPixel/s and the presence of 60 RT cores and 240 tensor cores give the NVIDIA part capabilities the AMD part does not list at all. Users needing verified benchmark performance should look to the RTX 5080 Mobile, as it has ten recorded scores; the MI308X has none in the database. The 50th percentile ranking for the MI308X reflects missing data, not measured performance, while the 81st percentile for the RTX 5080 Mobile reflects actual test results.