AMD Instinct MI325X vs NVIDIA RTX 500 Mobile Ada Generation Comparison

Where Each One Wins

The AMD Instinct MI325X and NVIDIA RTX 500 Mobile Ada Generation occupy entirely different corners of the GPU landscape, and the recorded data makes that split unmistakable. The MI325X is a data-center accelerator built around massive memory capacity and raw compute throughput, while the RTX 500 Mobile is a low-power integrated graphics processor for portable devices. In the database, neither part has recorded benchmark scores, so the wins are defined by architectural capabilities rather than measured frame rates or compute results.

The MI325X wins on sheer scale: 256 GB of HBM3e memory versus 4 GB of GDDR6, an 8192-bit memory bus versus 64-bit, and 19,456 shading units versus 2,048. It also delivers 81.72 TFLOPS of FP32 compute, which is roughly 9.8 times the RTX 500 Mobile's 8.294 TFLOPS. For anyone processing large language models, scientific simulations, or memory-bound data workloads, the MI325X is the clear choice based on capacity and bandwidth alone.

The RTX 500 Mobile wins on practicality for client devices. It is an IGP (integrated graphics processor) with a 35 W TDP, while the MI325X demands a 1000 W TDP and a suggested 1400 W power supply. The NVIDIA part also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, whereas the AMD accelerator lists no graphics APIs at all. For a portable workstation or thin laptop, the RTX 500 Mobile is the only viable option between the two, as the MI325X has no display outputs and is not designed for interactive graphics.

Architecture Differences

The two chips come from different design philosophies. The MI325X uses AMD's CDNA 3.0 architecture on a chip called Aqua Vanjaram, built on a 5 nm TSMC process. The RTX 500 Mobile uses NVIDIA's Ada Lovelace architecture on the AD107 chip, also on a 5 nm TSMC process. Both share the same process node and foundry, but the similarities end there.

The MI325X packs 153,000 million transistors onto a 1017 mm² die, yielding a transistor density of 150.4 million per square millimeter. The RTX 500 Mobile has 18,900 million transistors on a 159 mm² die, with a density of 118.9 million per square millimeter. The AMD part is a monolithic behemoth, nearly 6.4 times the transistor count of the NVIDIA chip and over 6.4 times the die area.

Memory architecture differs fundamentally. The MI325X uses HBM3e with a staggering 8192-bit bus and 6.14 TB/s of bandwidth, running at 1500 MHz with 6 Gbps effective speed. The RTX 500 Mobile uses GDDR6 with a 64-bit bus, 128.0 GB/s of bandwidth, and 2000 MHz with 16 Gbps effective speed. The memory capacity gap is 64 times in favor of the AMD part, and bandwidth is roughly 48 times higher.

Compute resources also diverge sharply. The MI325X has 19,456 shading units, 1,216 texture mapping units, and zero ROPs. It also has no RT cores or tensor cores listed. The RTX 500 Mobile has 2,048 shading units, 64 TMUs, 32 ROPs, 16 RT cores, and 64 tensor cores. The NVIDIA part is a complete graphics processor with fixed-function units for rendering, while the AMD part is a pure compute accelerator with a pixel rate of 0 MPixel/s and no display outputs.

Clock speeds tell a different story. The RTX 500 Mobile has a base clock of 1485 MHz and a boost of 2025 MHz. The MI325X has a lower base of 1000 MHz but a higher boost of 2100 MHz. The NVIDIA chip runs at higher base frequencies, but the AMD chip boosts slightly higher.

Power envelopes are wildly different. The MI325X has a TDP of 1000 W, while the RTX 500 Mobile draws just 35 W. The AMD part requires a 1400 W suggested power supply, and the NVIDIA part has no suggested PSU listed. The MI325X is an OAM module with no power connectors listed, while the RTX 500 Mobile is an IGP with no power connectors either.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark results for these two parts, so the comparison rests on the recorded specifications. The biggest wins in raw compute go to the MI325X. Its FP32 throughput of 81.72 TFLOPS is 9.85 times the RTX 500 Mobile's 8.294 TFLOPS. FP16 performance is identical to FP32 on both parts, meaning the MI325X also delivers 81.72 TFLOPS of FP16 versus 8.294 TFLOPS on the NVIDIA chip.

Memory bandwidth is another dominant win. The MI325X's 6.14 TB/s is 48 times the RTX 500 Mobile's 128.0 GB/s. Texture fill rate also favors AMD: 2,553.6 GTexel/s versus 129.6 GTexel/s, a 19.7 times advantage. The pixel rate goes the other way, as the MI325X produces no pixels at all, while the RTX 500 Mobile achieves 64.80 GPixel/s.

The RTX 500 Mobile wins in rendering features. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI325X lists no supported APIs. The NVIDIA part also has 16 RT cores and 64 tensor cores, which the AMD part does not list. For any workload involving ray tracing, DLSS-style tensor operations, or traditional graphics APIs, the RTX 500 Mobile is the only part with the required hardware.

Clock speeds favor the NVIDIA chip at base (1485 MHz versus 1000 MHz) but the AMD chip at boost (2100 MHz versus 2025 MHz). The RTX 500 Mobile also has a higher memory clock at 2000 MHz versus 1500 MHz on the MI325X, though the effective data rate is much higher on the AMD part due to HBM3e's architecture.

FAQ

Q: Which GPU has more memory bandwidth?

A: The AMD Instinct MI325X has 6.14 TB/s of bandwidth over an 8192-bit HBM3e bus. The NVIDIA RTX 500 Mobile has 128.0 GB/s over a 64-bit GDDR6 bus, which is roughly 48 times less bandwidth.

Q: Can the MI325X render graphics or output to a display?

A: No. The MI325X has zero ROPs, a pixel rate of 0 MPixel/s, no display outputs, and no listed graphics APIs (DirectX, OpenGL, Vulkan all show N/A). The RTX 500 Mobile has 32 ROPs, a 64.80 GPixel/s pixel rate, and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: What is the power consumption difference?

A: The MI325X has a 1000 W TDP and needs a 1400 W suggested power supply. The RTX 500 Mobile has a 35 W TDP and no suggested PSU listed. The NVIDIA part consumes about 3.5% of the AMD part's thermal design power.

Q: Does the MI325X have ray tracing or tensor cores?

A: The database lists no RT cores or tensor cores for the MI325X. The RTX 500 Mobile has 16 RT cores and 64 tensor cores, which support ray tracing and AI-accelerated workloads respectively.

Q: How do the transistor counts compare?

A: The MI325X has 153,000 million transistors on a 1017 mm² die. The RTX 500 Mobile has 18,900 million transistors on a 159 mm² die. The AMD chip has roughly 8.1 times more transistors and a 6.4 times larger die.

Q: Which GPU has more shading units?

A: The MI325X has 19,456 shading units, which is 9.5 times more than the RTX 500 Mobile's 2,048 shading units. The AMD part also has 1,216 TMUs versus 64 on the NVIDIA chip.

The Verdict

The data shows two parts built for different jobs. The AMD Instinct MI325X is a server accelerator for compute-heavy workloads. Its 256 GB of HBM3e memory, 6.14 TB/s of bandwidth, and 81.72 TFLOPS of FP32 compute make it suited for large-scale data processing, AI training, and scientific computing. It has no rendering capabilities, no display outputs, and no graphics API support, so it cannot function as a conventional GPU for interactive use.

The NVIDIA RTX 500 Mobile Ada Generation is a low-power integrated processor for portable devices. Its 35 W TDP, 4 GB of GDDR6 memory, and 128.0 GB/s bandwidth are modest by any measure, but it includes full graphics features: 32 ROPs, 16 RT cores, 64 tensor cores, and support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. It is the only one of these two that can output to a display or run games and graphics applications.

Choose the MI325X if the workload is memory-bound compute with no need for rendering. Choose the RTX 500 Mobile if the requirement is a low-power, portable GPU with complete graphics API support. The two parts do not compete on any meaningful metric; they serve distinct market segments with no overlap in use case.

Specification Differences

| Field | AMD Instinct MI325X | NVIDIA RTX 500 Mobile Ada Generation |

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

| Architecture | CDNA 3.0 | Ada Lovelace |

| Chip | Aqua Vanjaram | AD107 |

| Process Node | 5 nm | 5 nm |

| Transistors | 153,000 million | 18,900 million |

| Die Size | 1017 mm² | 159 mm² |

| Base Clock | 1000 MHz | 1485 MHz |

| Boost Clock | 2100 MHz | 2025 MHz |

| Memory Size | 256 GB | 4 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus | 8192 bit | 64 bit |

| Memory Bandwidth | 6.14 TB/s | 128.0 GB/s |

| Shading Units | 19,456 | 2,048 |

| TMUs | 1,216 | 64 |

| ROPs | 0 | 32 |

| RT Cores | None listed | 16 |

| Tensor Cores | None listed | 64 |

| FP32 | 81.72 TFLOPS | 8.294 TFLOPS |

| FP16 | 81.72 TFLOPS | 8.294 TFLOPS |

| TDP | 1000 W | 35 W |

| Slot Width | OAM Module | IGP |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x8 |

| Display Outputs | No outputs | Portable Device Dependent |

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

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Suggested PSU | 1400 W | None listed |

| Release Date | 2024-10-09 | 2024-02-25 |

| Production Status | Not listed | Active |

| Predecessor | Radeon Instinct | Ampere-MW |

| Successor | None listed | Blackwell-MW |