AMD Instinct MI308X vs NVIDIA GeForce RTX 5070 Mobile Comparison

The Verdict

The database comparison between the AMD Instinct MI308X and the NVIDIA GeForce RTX 5070 Mobile is a study in extremes. The AMD Instinct MI308X is a data-center accelerator with no display outputs, no graphics API support, and no recorded benchmark scores. The NVIDIA GeForce RTX 5070 Mobile is an active, mobile-focused GPU with a full suite of DirectX, OpenGL, and Vulkan support, a 75th percentile ranking among all GPUs, and nine recorded benchmark results. The data shows that the RTX 5070 Mobile is the only one of the two that can render graphics or run standard gaming and workstation workloads. The MI308X, with 192 GB of HBM3 memory and 81.72 TFLOPS of FP32 compute, is positioned for server-side compute tasks that do not require a display or conventional graphics APIs. The RTX 5070 Mobile is the choice for any client-side graphics workload, while the MI308X is the choice for massive memory-bandwidth compute deployments, though it delivers no measurable graphics performance in the database.

Architecture Differences

The AMD Instinct MI308X uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, built on a 5 nm process at TSMC. The NVIDIA GeForce RTX 5070 Mobile uses the Blackwell 2.0 architecture with the GB206 chip, also on a 5 nm process at TSMC. The MI308X packs 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per mm². The RTX 5070 Mobile contains 21,900 million transistors on an 181 mm² die, with a density of 121.0 million per mm². The MI308X die is over five times larger and holds seven times as many transistors.

Memory configurations differ sharply. The MI308X has 192 GB of HBM3 on an 8192-bit bus, producing 5.32 TB/s of bandwidth. The RTX 5070 Mobile has 8 GB of GDDR7 on a 128-bit bus, yielding 384.0 GB/s. The MI308X memory bandwidth is roughly 13.8 times higher, and its memory capacity is 24 times larger.

Shader resources also diverge. The MI308X has 19,456 shading units and 1,216 texture mapping units, but zero ROPs and a pixel rate of 0 MPixel/s. The RTX 5070 Mobile has 4,608 shading units, 144 TMUs, 48 ROPs, and a 68.40 GPixel/s pixel rate. The MI308X has no ray tracing cores and no tensor cores listed, while the RTX 5070 Mobile includes 36 ray tracing cores and 144 tensor cores. The MI308X texture rate is 2,553.6 GTexel/s versus 205.2 GTexel/s for the RTX 5070 Mobile.

Clock behavior is also distinct. The MI308X base clock is 1000 MHz with a 2100 MHz boost. The RTX 5070 Mobile runs a 907 MHz base and a 1425 MHz boost. FP32 and FP16 throughput on the MI308X is 81.72 TFLOPS with a 1:1 ratio; the RTX 5070 Mobile delivers 13.13 TFLOPS in both formats, also 1:1. The MI308X carries a 750 W TDP and a suggested PSU of 1150 W, while the RTX 5070 Mobile draws 50 W. The MI308X is an OAM module with no power connectors and no display outputs; the RTX 5070 Mobile is an IGP with display outputs described as portable device dependent. Both use PCIe 5.0 x16. The MI308X supports no graphics APIs, while the RTX 5070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Release dates in the database place the MI308X in December 2023 and the RTX 5070 Mobile in April 2025.

Head-to-Head Benchmarks

There are no shared benchmark results between the two products. The AMD Instinct MI308X has zero recorded benchmarks, an average benchmark score of zero, and a percentile ranking of 50. The NVIDIA GeForce RTX 5070 Mobile has nine recorded benchmarks and an average score of 29,928, placing it in the 75th percentile of all GPUs. The absence of overlapping tests means no direct numerical comparison is possible from the database. The MI308X cannot be evaluated against the RTX 5070 Mobile in any standard graphics benchmark because it records no results.

The RTX 5070 Mobile's own benchmark results provide context for its performance tier. Its Geekbench OpenCL score is 122,238 and its Vulkan score is 116,960. Passmark results include 20,355 in G3D, 8,279 in GPU compute, 896 in G2D, 214 in DirectX 9, 192 in DirectX 11, 129 in DirectX 10, and 93 in DirectX 12. The nearest rivals in the database show tight competition: the NVIDIA GeForce RTX 3070 Ti averages 29,945, just 0.1% above the RTX 5070 Mobile; the RTX 2080 Ti averages 29,783, 0.5% below; the AMD Radeon RX 6800 averages 30,095, 0.6% above; and the AMD Radeon RX 6700 averages 30,433, 1.7% above. The RTX 5070 Mobile effectively trades blows with these desktop-class GPUs from previous generations, sitting within a 1.7% band of all four rivals.

The MI308X, by contrast, has no scores and no rivals listed. Its percentile of 50 is a neutral midpoint that reflects the absence of benchmark data rather than measured performance. The recorded data indicates that the MI308X is not evaluated by the same graphics benchmark suite that produces results for the RTX 5070 Mobile.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI308X lists 81.72 TFLOPS of FP32 compute, while the NVIDIA GeForce RTX 5070 Mobile lists 13.13 TFLOPS. The MI308X figure is about 6.2 times higher, though the MI308X has no recorded benchmark scores to confirm real-world performance.

Q: Which GPU supports ray tracing?

A: The NVIDIA GeForce RTX 5070 Mobile includes 36 ray tracing cores and supports DirectX 12 Ultimate (12_2). The AMD Instinct MI308X lists no ray tracing cores and no DirectX support.

Q: How much memory does each GPU have?

A: The AMD Instinct MI308X has 192 GB of HBM3 memory with a 5.32 TB/s bandwidth. The NVIDIA GeForce RTX 5070 Mobile has 8 GB of GDDR7 memory with 384.0 GB/s bandwidth.

Q: What is the power draw difference?

A: The AMD Instinct MI308X has a 750 W TDP and requires a suggested 1150 W power supply. The NVIDIA GeForce RTX 5070 Mobile has a 50 W TDP, and no suggested PSU is listed in the database.

Q: Can either GPU output to a display?

A: No. The AMD Instinct MI308X has no display outputs. The NVIDIA GeForce RTX 5070 Mobile lists display outputs as portable device dependent, meaning output capability depends on the host laptop, not the GPU itself.

Q: How does the RTX 5070 Mobile compare to its nearest rivals?

A: The RTX 5070 Mobile scores 29,928 on average. The NVIDIA GeForce RTX 3070 Ti is 0.1% higher, the RTX 2080 Ti is 0.5% lower, the AMD Radeon RX 6800 is 0.6% higher, and the AMD Radeon RX 6700 is 1.7% higher.

Where Each One Wins

The NVIDIA GeForce RTX 5070 Mobile wins every measurable graphics category in this comparison, simply because it is the only product with benchmark data. It records an average score of 29,928 and sits in the 75th percentile of all GPUs. Its Geekbench OpenCL result of 122,238 and Vulkan result of 116,960 indicate strong compute throughput for a mobile part. Passmark G3D at 20,355 and GPU compute at 8,279 confirm that it handles both rasterization and general-purpose tasks. The RTX 5070 Mobile also wins on connectivity and software compatibility: it supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and it includes 36 ray tracing cores and 144 tensor cores for accelerated features.

The AMD Instinct MI308X wins on raw hardware resources. Its 192 GB of HBM3 memory dwarfs the 8 GB GDDR7 pool of the RTX 5070 Mobile. Its 5.32 TB/s memory bandwidth is an order of magnitude higher. Its 19,456 shading units, 1,216 TMUs, and 81.72 TFLOPS FP32 compute position it for large-scale compute workloads that exceed the RTX 5070 Mobile's capacity. The MI308X also uses a 5 nm process, as does the RTX 5070 Mobile, but with a much larger die and far higher transistor count. However, the MI308X has zero ROPs, no display outputs, no graphics API support, and no recorded benchmarks, so it cannot claim any measured performance win in the database.

The use-case split is clear. The RTX 5070 Mobile suits laptops and mobile workstations where graphics rendering, ray tracing, and standard GPU compute are required. Its 50 W TDP and portable device dependent display outputs fit a mobile form factor. The MI308X suits server or accelerator deployments where massive memory capacity and bandwidth matter more than graphics output. Its OAM module form factor, 750 W TDP, and 1150 W suggested PSU indicate a data-center installation profile. The recorded data shows no overlap in workload capability: the MI308X is a compute accelerator without graphics support, and the RTX 5070 Mobile is a graphics and compute GPU without server-scale memory.