AMD Instinct MI308X vs NVIDIA GeForce RTX 5070 Ti Mobile Comparison

FAQ

Q: What is the core architectural difference between the AMD Instinct MI308X and the NVIDIA GeForce RTX 5070 Ti Mobile?

A: The AMD Instinct MI308X uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, built for compute accelerators in the Instinct (MIx) generation. The NVIDIA GeForce RTX 5070 Ti Mobile uses the Blackwell 2.0 architecture with the GB205 chip, part of the GeForce 50 Mobile series.

Q: How do the memory configurations differ?

A: The AMD Instinct MI308X has 192 GB of HBM3 memory on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The NVIDIA GeForce RTX 5070 Ti Mobile has 12 GB of GDDR7 memory on a 192-bit bus, delivering 672.0 GB/s of bandwidth.

Q: Which GPU has higher compute throughput in FP32?

A: The AMD Instinct MI308X delivers 81.72 TFLOPS FP32, which is roughly 4.8 times the 17.04 TFLOPS FP32 of the NVIDIA GeForce RTX 5070 Ti Mobile.

Q: What is the power requirement difference?

A: The AMD Instinct MI308X has a TDP of 750 W and suggests a 1150 W power supply. The NVIDIA GeForce RTX 5070 Ti Mobile has a TDP of 60 W and no suggested PSU listed.

Q: Does the NVIDIA GPU support graphics APIs?

A: Yes, the NVIDIA GeForce RTX 5070 Ti Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD Instinct MI308X lists N/A for DirectX, OpenGL, and Vulkan.

Q: What are the physical form factors?

A: The AMD Instinct MI308X is an OAM Module with no display outputs. The NVIDIA GeForce RTX 5070 Ti Mobile is an IGP (integrated GPU package) with display outputs described as Portable Device Dependent.

Architecture Differences

The AMD Instinct MI308X and NVIDIA GeForce RTX 5070 Ti Mobile represent two entirely different design philosophies. The MI308X is built on CDNA 3.0, an architecture optimized for data center compute workloads. The RTX 5070 Ti Mobile uses Blackwell 2.0, designed for consumer and professional graphics in laptops.

The transistor counts show the scale difference. The MI308X packs 153,000 million transistors on a 1017 mm² die, while the RTX 5070 Ti Mobile has 31,100 million transistors on a 263 mm² die. Both use a 5 nm process from TSMC, but the transistor density differs: the MI308X achieves 150.4M transistors per mm² versus 118.3M per mm² for the NVIDIA chip.

Memory architecture is a major differentiator. The MI308X uses HBM3 with a massive 8192-bit bus width and 5.32 TB/s bandwidth. The RTX 5070 Ti Mobile uses GDDR7 with a 192-bit bus and 672.0 GB/s bandwidth. This gives the AMD part roughly 7.9 times the raw memory bandwidth, which matters heavily for large data sets.

The compute pipelines differ in structure. The MI308X has 19,456 shading units, 1,216 TMUs, and 0 ROPs, reflecting a pure compute design with no rasterization output stage. The RTX 5070 Ti Mobile has 5,888 shading units, 184 TMUs, and 80 ROPs, plus 46 RT cores and 184 tensor cores. The NVIDIA part includes ray tracing and tensor hardware, while the AMD accelerator omits these entirely.

Clock behavior also diverges. The MI308X runs at a 1000 MHz base and 2100 MHz boost. The RTX 5070 Ti Mobile runs lower at 847 MHz base and 1447 MHz boost, likely constrained by its 60 W TDP. The memory clocks differ: 1300 MHz (5.2 Gbps effective) for the AMD HBM3 versus 1750 MHz (28 Gbps effective) for the NVIDIA GDDR7.

The MI308X reports no API support for DirectX, OpenGL, or Vulkan, confirming it is not a graphics-oriented product. The RTX 5070 Ti Mobile fully supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The AMD part also has no display outputs, while the NVIDIA part's outputs are portable device dependent.

Where Each One Wins

The AMD Instinct MI308X wins decisively in raw compute throughput. Its FP32 rating of 81.72 TFLOPS dwarfs the RTX 5070 Ti Mobile's 17.04 TFLOPS. FP16 performance matches at 81.72 TFLOPS for the AMD part versus 17.04 TFLOPS for the NVIDIA part. Texture rate also favors AMD heavily: 2,553.6 GTexel/s versus 266.2 GTexel/s.

Memory capacity and bandwidth are clear AMD wins. The 192 GB HBM3 pool with 5.32 TB/s bandwidth suits large model inference, scientific simulation, and data-heavy workloads. The RTX 5070 Ti Mobile's 12 GB GDDR7 with 672.0 GB/s is far smaller, limiting the working set size.

The NVIDIA GeForce RTX 5070 Ti Mobile wins in graphics-oriented features. It has 80 ROPs and delivers 115.8 GPixel/s pixel rate, while the MI308X has 0 ROPs and 0 MPixel/s pixel rate. The RTX 5070 Ti Mobile also has 46 RT cores and 184 tensor cores, enabling ray tracing and AI acceleration features absent from the AMD part.

Power efficiency favors NVIDIA by a wide margin. The RTX 5070 Ti Mobile operates at 60 W TDP, while the MI308X draws 750 W, a 12.5 times difference. The NVIDIA part also fits into laptops as an IGP, while the AMD part requires an OAM module slot.

Benchmark data exists only for the NVIDIA GPU. The RTX 5070 Ti Mobile scores 143,870 in Geekbench OpenCL and 139,213 in Geekbench Vulkan. Passmark results include 24,004 in G3D, 10,101 in GPU Compute, 981 in G2D, and lower scores in legacy DirectX tests. The MI308X has no recorded benchmark scores and sits at the 50th percentile against all GPUs, while the RTX 5070 Ti Mobile sits at the 80th percentile.

Specification Differences

| Specification | AMD Instinct MI308X | NVIDIA GeForce RTX 5070 Ti Mobile |

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

| Process Node | 5 nm | 5 nm |

| Transistors | 153,000 million | 31,100 million |

| Die Size | 1017 mm² | 263 mm² |

| Transistor Density | 150.4M / mm² | 118.3M / mm² |

| Base Clock | 1000 MHz | 847 MHz |

| Boost Clock | 2100 MHz | 1447 MHz |

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

| Memory Size | 192 GB | 12 GB |

| Memory Type | HBM3 | GDDR7 |

| Memory Bus Width | 8192 bit | 192 bit |

| Memory Bandwidth | 5.32 TB/s | 672.0 GB/s |

| Shading Units | 19,456 | 5,888 |

| TMUs | 1,216 | 184 |

| ROPs | 0 | 80 |

| RT Cores | None | 46 |

| Tensor Cores | None | 184 |

| Pixel Rate | 0 MPixel/s | 115.8 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 266.2 GTexel/s |

| FP32 | 81.72 TFLOPS | 17.04 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 17.04 TFLOPS (1:1) |

| TDP | 750 W | 60 W |

| Slot Width | OAM Module | IGP |

| Suggested PSU | 1150 W | None |

| 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 | 2025-02-28 |

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark comparisons between the AMD Instinct MI308X and the NVIDIA GeForce RTX 5070 Ti Mobile. The MI308X has no benchmark entries at all, and its average benchmark score is 0. The RTX 5070 Ti Mobile, by contrast, has nine recorded benchmark results and an average benchmark score of 35,435.

The NVIDIA GPU's benchmark profile shows its strongest results in modern compute and graphics tests. Geekbench OpenCL scores 143,870 and Geekbench Vulkan scores 139,213. Passmark G3D scores 24,004, while Passmark GPU Compute scores 10,101. Legacy DirectX tests produce much lower numbers: 259 in DirectX 9, 237 in DirectX 11, 151 in DirectX 10, and 102 in DirectX 12. Passmark G2D scores 981.

The RTX 5070 Ti Mobile's nearest rivals in the database provide context for its performance tier. The NVIDIA Quadro GV100 averages 35,520, which is 0.2% higher than the RTX 5070 Ti Mobile's average. The AMD Radeon Pro Duo averages 35,860, 1.2% higher. The NVIDIA A2 averages 34,690, which is 2.1% lower. The NVIDIA T1000 averages 36,289, 2.4% higher. This places the RTX 5070 Ti Mobile in a tight competitive band near these workstation-oriented GPUs.

Without recorded benchmark data for the MI308X, the comparison must rely on the specification sheet. The FP32 throughput difference is substantial: 81.72 TFLOPS versus 17.04 TFLOPS, a 4.8 times gap. Memory bandwidth differs by a factor of roughly 7.9, at 5.32 TB/s versus 672.0 GB/s. The texture rate gap is even larger at roughly 9.6 times, 2,553.6 GTexel/s versus 266.2 GTexel/s.

The percentile rankings tell a partial story. The MI308X sits at the 50th percentile against all GPUs, while the RTX 5070 Ti Mobile sits at the 80th percentile. However, the MI308X's zero benchmark scores likely reflect a lack of testing coverage rather than actual performance, since its specifications suggest far higher compute capability than the 50th percentile would imply.

The Verdict

The data describes two products built for different jobs, not direct competitors. The AMD Instinct MI308X is a data center accelerator with no graphics API support, no display outputs, and no ROPs. Its 192 GB HBM3 memory, 5.32 TB/s bandwidth, and 81.72 TFLOPS FP32 position it for compute-heavy workloads like large-scale inference or simulation. The 750 W TDP and OAM module form factor require server infrastructure.

The NVIDIA GeForce RTX 5070 Ti Mobile is a laptop GPU with full graphics capabilities. Its 80 ROPs, 46 RT cores, 184 tensor cores, and 115.8 GPixel/s pixel rate enable rasterization, ray tracing, and AI-accelerated features. The 60 W TDP and IGP form factor fit portable devices. Benchmark data confirms it performs competitively against workstation GPUs like the Quadro GV100 and Radeon Pro Duo, sitting within 2.4% of those scores.

Users needing raw compute throughput and massive memory capacity should look at the MI308X. Its FP32 output is 4.8 times higher, and its memory bandwidth is roughly 7.9 times higher than the RTX 5070 Ti Mobile. The absence of display outputs and graphics APIs makes it unsuitable for traditional rendering tasks.

Users needing a mobile GPU with graphics and compute capability should look at the RTX 5070 Ti Mobile. It delivers full DirectX 12 Ultimate support, ray tracing hardware, tensor cores, and a benchmark profile that places it near established workstation parts. Its 60 W power envelope makes it practical for laptop integration.

The MI308X lacks benchmark scores in the database, so its real-world performance cannot be verified against the RTX 5070 Ti Mobile's recorded results. The specification comparison, however, shows a clear division: the MI308X for compute density and memory scale, the RTX 5070 Ti Mobile for graphics features and mobile efficiency. The choice depends entirely on the workload and form factor requirements.