AMD Instinct MI325X vs NVIDIA RTX 3500 Mobile Ada Generation Comparison

Head-to-Head Benchmarks

The recorded data contains no direct head-to-head benchmark scores for the AMD Instinct MI325X and the NVIDIA RTX 3500 Mobile Ada Generation. Both entries show an empty benchmark array and a win count of zero for each side. The absence of measured performance results means the comparison must rely entirely on the architectural and specification data available in the database.

The MI325X delivers 81.72 TFLOPS of FP32 compute, which is 5.17 times the 15.82 TFLOPS recorded for the RTX 3500 Mobile. In FP16, the ratio remains identical at 81.72 TFLOPS versus 15.82 TFLOPS, as both parts use a 1:1 FP16 to FP32 ratio. Texture throughput favors the AMD part by a factor of 10.3: 2,553.6 GTexel/s against 247.2 GTexel/s. Pixel rate reverses direction, with the NVIDIA part outputting 98.88 GPixel/s while the AMD accelerator records 0 MPixel/s, a direct consequence of its lack of raster operation units.

Memory capacity shows a 21.3-fold difference: 256 GB on the MI325X versus 12 GB on the RTX 3500 Mobile. Memory bandwidth follows with a 14.2-fold gap: 6.14 TB/s versus 432.0 GB/s. The bus width difference is substantial as well, 8192 bit versus 192 bit. Clock speeds differ in both directions: the NVIDIA chip has a higher base clock at 1110 MHz compared to 1000 MHz, while the AMD chip boosts higher at 2100 MHz versus 1545 MHz. Memory clocks show 6 Gbps effective on the AMD part and 18 Gbps effective on the NVIDIA part, though the AMD memory operates across a vastly wider bus.

Neither part has any recorded benchmark scores, so percentile ranking against all GPUs sits at 50 for both. Average benchmark scores are zero for both entries. The database contains no nearest rival entries for either product, which means no comparative performance deltas are available.

FAQ

Q: Which GPU has higher raw FP32 compute?

A: The AMD Instinct MI325X records 81.72 TFLOPS, which is 5.17 times the 15.82 TFLOPS of the NVIDIA RTX 3500 Mobile Ada Generation.

Q: How much memory does each GPU have?

A: The MI325X has 256 GB of HBM3e memory, while the RTX 3500 Mobile has 12 GB of GDDR6 memory.

Q: What is the power draw difference?

A: The MI325X has a TDP of 1000 W, while the RTX 3500 Mobile has a TDP of 100 W, a 10-fold difference.

Q: Which GPU supports ray tracing?

A: Only the RTX 3500 Mobile lists 40 RT cores. The MI325X entry shows no RT core count.

Q: What are the bus interfaces?

A: The MI325X uses PCIe 5.0 x16, while the RTX 3500 Mobile uses PCIe 4.0 x16.

Q: Do both GPUs have display outputs?

A: No. The MI325X lists "No outputs," while the RTX 3500 Mobile lists "Portable Device Dependent" outputs.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The AMD Instinct MI325X uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the NVIDIA RTX 3500 Mobile uses Ada Lovelace architecture with the AD104 chip. Both are fabricated on a 5 nm process at TSMC, but the similarities end there.

Transistor counts differ by a factor of 4.27: the MI325X packs 153,000 million transistors, while the RTX 3500 Mobile has 35,800 million. Die size shows a 3.46-fold difference, with the MI325X at 1017 mm² and the RTX 3500 Mobile at 294 mm². Transistor density favors the AMD part at 150.4M per mm² versus 121.8M per mm².

The MI325X is designed as a compute accelerator with 19,456 shading units and 1,216 texture mapping units, but it has zero ROPs and no RT or tensor core counts listed. The RTX 3500 Mobile has 5,120 shading units, 160 TMUs, 64 ROPs, 40 RT cores, and 160 tensor cores. This structural difference explains the pixel rate disparity: the NVIDIA part outputs 98.88 GPixel/s, while the AMD part outputs 0 MPixel/s.

Memory architectures diverge completely. The MI325X uses HBM3e across an 8192-bit bus, delivering 6.14 TB/s of bandwidth. The RTX 3500 Mobile uses GDDR6 across a 192-bit bus, delivering 432.0 GB/s. The MI325X memory clock runs at 1500 MHz with 6 Gbps effective, while the RTX 3500 Mobile runs at 2250 MHz with 18 Gbps effective.

Form factors differ as well. The MI325X is an OAM module with no power connectors listed and a suggested PSU of 1400 W. The RTX 3500 Mobile is an IGP (integrated graphics processor) with no power connectors and no suggested PSU listed. The MI325X supports PCIe 5.0 x16, while the RTX 3500 Mobile uses PCIe 4.0 x16.

API support reflects their different roles. The MI325X lists N/A for DirectX, OpenGL, and Vulkan. The RTX 3500 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA part also has display outputs described as "Portable Device Dependent," while the AMD part has none.

Release dates show a 19-month gap: the MI325X launched on 2024-10-09, and the RTX 3500 Mobile launched on 2023-03-20. The RTX 3500 Mobile has an active production status, while the MI325X has no production status recorded. The NVIDIA part lists its predecessor as Ampere-MW and successor as Blackwell-MW, while the AMD part lists its predecessor as Radeon Instinct with no successor recorded.

The Verdict

The data indicates two products built for entirely different purposes. The AMD Instinct MI325X is a data center accelerator with massive memory capacity, extreme bandwidth, and compute throughput aimed at workloads that do not require graphics output. The NVIDIA RTX 3500 Mobile is a laptop GPU with graphics output, ray tracing support, and a full API stack for client-side rendering.

For raw compute density, the MI325X holds a decisive advantage: 5.17 times the FP32 throughput, 10.3 times the texture rate, and 14.2 times the memory bandwidth. Its 256 GB memory capacity dwarfs the 12 GB on the RTX 3500 Mobile, making it suited for large model residency. The 1000 W TDP and OAM form factor indicate a server installation, not a workstation or laptop.

The RTX 3500 Mobile counters with the only pixel output path, the only ray tracing capability, and the only API support. Its 98.88 GPixel/s pixel rate, 40 RT cores, and 160 tensor cores give it graphics and rendering functionality the MI325X lacks entirely. The 100 W TDP and IGP form factor confirm its mobile positioning.

The database shows no benchmark scores for either part, so direct performance comparisons cannot be quantified. What the data does show is a clear division of capabilities. The MI325X is an accelerator without display outputs, while the RTX 3500 Mobile is a graphics processor with portable device outputs. The choice between them depends on whether the workload requires compute and memory capacity or graphics and rendering features.

Specification Differences

| Specification | AMD Instinct MI325X | NVIDIA RTX 3500 Mobile Ada Generation |

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

| Architecture | CDNA 3.0 | Ada Lovelace |

| Chip | Aqua Vanjaram | AD104 |

| Process Node | 5 nm | 5 nm |

| Transistors | 153,000 million | 35,800 million |

| Die Size | 1017 mm² | 294 mm² |

| Base Clock | 1000 MHz | 1110 MHz |

| Boost Clock | 2100 MHz | 1545 MHz |

| Memory Clock | 1500 MHz (6 Gbps effective) | 2250 MHz (18 Gbps effective) |

| Memory Size | 256 GB | 12 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus | 8192 bit | 192 bit |

| Memory Bandwidth | 6.14 TB/s | 432.0 GB/s |

| Shading Units | 19456 | 5120 |

| TMUs | 1216 | 160 |

| ROPs | 0 | 64 |

| RT Cores | Not listed | 40 |

| Tensor Cores | Not listed | 160 |

| Pixel Rate | 0 MPixel/s | 98.88 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 247.2 GTexel/s |

| FP32 | 81.72 TFLOPS | 15.82 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 15.82 TFLOPS (1:1) |

| TDP | 1000 W | 100 W |

| Slot Width | OAM Module | IGP |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 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 | 2024-10-09 | 2023-03-20 |

| Production Status | Not listed | Active |

| Predecessor | Radeon Instinct | Ampere-MW |

| Successor | Not listed | Blackwell-MW |

| Suggested PSU | 1400 W | Not listed |

Where Each One Wins

The AMD Instinct MI325X wins in every compute and memory metric recorded in the database. FP32 and FP16 throughput are both 81.72 TFLOPS, giving it a 5.17-fold advantage over the RTX 3500 Mobile. Texture rate of 2,553.6 GTexel/s is 10.3 times higher. Memory bandwidth of 6.14 TB/s is 14.2 times higher, enabled by the 8192-bit bus and HBM3e memory. The 256 GB capacity is 21.3 times larger, which supports workloads that need entire models or datasets resident in GPU memory. The PCIe 5.0 interface provides double the link bandwidth of PCIe 4.0. The higher boost clock of 2100 MHz versus 1545 MHz contributes to its compute advantage.

The NVIDIA RTX 3500 Mobile wins in all graphics-oriented metrics. It is the only one of the two with pixel output capability, recording 98.88 GPixel/s against zero on the MI325X. It has 64 ROPs where the AMD part has none. It lists 40 RT cores and 160 tensor cores, while the MI325X lists neither. Its base clock is 110 MHz higher, and its memory clock runs at 18 Gbps effective versus 6 Gbps, though across a much narrower bus. It provides full API support with DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, where the AMD part lists N/A for all three. Its display outputs are listed as portable device dependent, while the MI325X has none.

The power envelope also separates them. The RTX 3500 Mobile draws 100 W, one tenth of the MI325X's 1000 W TDP. The NVIDIA part's IGP form factor enables mobile integration, while the AMD part's OAM module requires a server chassis with a 1400 W suggested PSU. The production status of the RTX 3500 Mobile is active, while the MI325X has no production status recorded.

The release timeline shows the RTX 3500 Mobile arrived 19 months earlier, with its successor already listed as Blackwell-MW. The MI325X lists no successor, and its predecessor is the Radeon Instinct line. These details frame the MI325X as a current-generation accelerator and the RTX 3500 Mobile as an established mobile GPU with a known replacement path.