AMD Instinct MI355X vs NVIDIA RTX 3500 Mobile Ada Generation Comparison

Head-to-Head Benchmarks

The recorded database contains no direct benchmark scores for either GPU, and the win counters sit at zero for both. The average benchmark score for each is also zero. What the data does provide is raw compute and memory throughput figures that allow a direct theoretical comparison. The AMD Instinct MI355X delivers 78.64 TFLOPS of FP32 and FP16 compute, while the NVIDIA RTX 3500 Mobile Ada Generation delivers 15.82 TFLOPS in both. That places the MI355X ahead by roughly 4.97 times in raw FP32 throughput. Texture rate tells a similar story: 2,457.6 GTexel/s versus 247.2 GTexel/s, a 9.94 times advantage for the AMD part. Pixel rate flips the comparison entirely. The MI355X reports 0 MPixel/s, while the RTX 3500 Mobile delivers 98.88 GPixel/s. Memory bandwidth also favors the MI355X decisively: 8.19 TB/s versus 432.0 GB/s, a difference of roughly 18.96 times.

These are not apples-to-apples comparisons in the usual sense. The MI355X is an OAM module designed for compute accelerators, while the RTX 3500 Mobile is an integrated GPU for laptops. The data shows no overlap in benchmark results because none exist in the database. The percentile ranking for both sits at 50, which indicates median placement among all GPUs in the database, but with no benchmark scores behind those ranks, the percentile is a placeholder rather than a measured outcome.

Architecture Differences

The MI355X uses the CDNA 4.0 architecture on a 3 nm TSMC process, with a die size of 2380 mm² and 185,000 million transistors. The RTX 3500 Mobile uses Ada Lovelace on a 5 nm TSMC process, with a 294 mm² die and 35,800 million transistors. Transistor density favors the NVIDIA part: 121.8M per mm² versus 77.7M per mm². The MI355X packs 16,384 shading units, 1,024 TMUs, and zero ROPs, consistent with a compute-focused accelerator that lacks a display output. The RTX 3500 Mobile has 5,120 shading units, 160 TMUs, and 64 ROPs, plus 40 RT cores and 160 tensor cores. The MI355X lists no RT cores or tensor cores in the data, which reflects its CDNA design targeting compute workloads rather than graphics rendering. The MI355X also reports no DirectX, OpenGL, or Vulkan support, while the RTX 3500 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Memory architecture diverges sharply. The MI355X uses 288 GB of HBM3e across an 8192-bit bus, yielding 8.19 TB/s. The RTX 3500 Mobile uses 12 GB of GDDR6 across a 192-bit bus, yielding 432.0 GB/s. Clock behavior also differs: the MI355X runs at a 1000 MHz base and 2400 MHz boost, while the RTX 3500 Mobile runs at 1110 MHz base and 1545 MHz boost. Memory clocks are listed at 2000 MHz (8 Gbps effective) for the MI355X and 2250 MHz (18 Gbps effective) for the RTX 3500 Mobile. The MI355X carries a 1400 W TDP with a suggested PSU of 1800 W, while the RTX 3500 Mobile carries a 100 W TDP and no suggested PSU. The MI355X is an OAM Module with no power connectors and no display outputs, while the RTX 3500 Mobile is an IGP with no power connectors and display outputs described as portable device dependent. The MI355X uses PCIe 5.0 x16; the RTX 3500 Mobile uses PCIe 4.0 x16.

FAQ

Q: Which GPU has higher memory bandwidth?

A: The AMD Instinct MI355X provides 8.19 TB/s from 288 GB of HBM3e on an 8192-bit bus. The NVIDIA RTX 3500 Mobile provides 432.0 GB/s from 12 GB of GDDR6 on a 192-bit bus.

Q: Can either GPU handle graphics rendering?

A: The RTX 3500 Mobile supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and has 64 ROPs with a pixel rate of 98.88 GPixel/s. The MI355X reports no graphics API support, zero ROPs, and a pixel rate of 0 MPixel/s, indicating no rendering capability.

Q: What is the transistor count difference?

A: The MI355X contains 185,000 million transistors on a 2380 mm² die. The RTX 3500 Mobile contains 35,800 million transistors on a 294 mm² die.

Q: How do the power requirements compare?

A: The MI355X has a TDP of 1400 W and a suggested PSU of 1800 W. The RTX 3500 Mobile has a TDP of 100 W and no suggested PSU listed.

Q: What memory types do they use?

A: The MI355X uses HBM3e with a 2000 MHz memory clock (8 Gbps effective). The RTX 3500 Mobile uses GDDR6 with a 2250 MHz memory clock (18 Gbps effective).

Q: Which GPU has more shading units?

A: The MI355X has 16,384 shading units. The RTX 3500 Mobile has 5,120 shading units.

Specification Differences

| Specification | AMD Instinct MI355X | NVIDIA RTX 3500 Mobile Ada Generation |

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

| Architecture | CDNA 4.0 | Ada Lovelace |

| Process Node | 3 nm | 5 nm |

| Foundry | TSMC | TSMC |

| Transistors | 185,000 million | 35,800 million |

| Die Size | 2380 mm² | 294 mm² |

| Transistor Density | 77.7M / mm² | 121.8M / mm² |

| Base Clock | 1000 MHz | 1110 MHz |

| Boost Clock | 2400 MHz | 1545 MHz |

| Memory Clock | 2000 MHz 8 Gbps effective | 2250 MHz 18 Gbps effective |

| Memory Size | 288 GB | 12 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus Width | 8192 bit | 192 bit |

| Memory Bandwidth | 8.19 TB/s | 432.0 GB/s |

| Shading Units | 16384 | 5120 |

| TMUs | 1024 | 160 |

| ROPs | 0 | 64 |

| RT Cores | None | 40 |

| Tensor Cores | None | 160 |

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

| Texture Rate | 2,457.6 GTexel/s | 247.2 GTexel/s |

| FP32 | 78.64 TFLOPS | 15.82 TFLOPS |

| FP16 | 78.64 TFLOPS (1:1) | 15.82 TFLOPS (1:1) |

| TDP | 1400 W | 100 W |

| Slot Width | OAM Module | IGP |

| Power Connectors | None | None |

| Suggested PSU | 1800 W | None |

| 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 | 2025-06-11 | 2023-03-20 |

| Predecessor | Radeon Instinct | Ampere-MW |

| Successor | None | Blackwell-MW |

| Production Status | None | Active |

The Verdict

The data indicates these two GPUs serve entirely different purposes. The AMD Instinct MI355X is a compute accelerator with massive memory capacity, bandwidth, and FP32 throughput. Its 288 GB of HBM3e and 8.19 TB/s bandwidth make it suitable for large-scale data processing, and its 78.64 TFLOPS of FP32 and FP16 compute places it far ahead of the RTX 3500 Mobile in raw number crunching. The absence of ROPs, display outputs, and graphics API support confirms it is not designed for rendering or desktop use. The 1400 W TDP and OAM form factor also point to datacenter installation rather than workstation or portable use.

The NVIDIA RTX 3500 Mobile is a laptop GPU with rendering capability. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, has 40 RT cores and 160 tensor cores, and delivers 98.88 GPixel/s. Its 100 W TDP and IGP slot width make it suitable for mobile workstations. The 12 GB of GDDR6 on a 192-bit bus is modest compared to the MI355X, but the graphics features and portability define its role. The RTX 3500 Mobile also has a production status of Active, while the MI355X has none listed.

Neither GPU can substitute for the other. A system that needs graphics output and mobile operation must use the RTX 3500 Mobile. A system that needs maximum memory bandwidth and compute density in a server context must use the MI355X. The metric that matters most depends entirely on workload, and the data does not support a single winner across all uses.

Where Each One Wins

The AMD Instinct MI355X wins in every compute throughput measure. FP32 and FP16 both sit at 78.64 TFLOPS, which is 4.97 times the RTX 3500 Mobile's 15.82 TFLOPS. Texture rate is 2,457.6 GTexel/s versus 247.2 GTexel/s, a 9.94 times advantage. Memory bandwidth is 8.19 TB/s versus 432.0 GB/s, an 18.96 times advantage. The MI355X also wins on memory capacity, bus width, transistor count, die size, and process node advancement. It uses a newer 3 nm process versus 5 nm, and carries 185,000 million transistors versus 35,800 million. The MI355X supports PCIe 5.0 x16, while the RTX 3500 Mobile uses PCIe 4.0 x16.

The NVIDIA RTX 3500 Mobile wins in graphics and mobile-specific features. It has 64 ROPs and a pixel rate of 98.88 GPixel/s, while the MI355X has zero ROPs and 0 MPixel/s. The RTX 3500 Mobile has 40 RT cores and 160 tensor cores, neither of which appear on the MI355X. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI355X lists N/A for all three. The RTX 3500 Mobile also has a lower TDP at 100 W versus 1400 W, making it feasible for portable devices. It has a higher base clock at 1110 MHz versus 1000 MHz, and a higher memory clock at 2250 MHz versus 2000 MHz. The RTX 3500 Mobile has a higher transistor density at 121.8M per mm² versus 77.7M per mm². It has an Active production status and a successor in Blackwell-MW, while the MI355X lists neither. The RTX 3500 Mobile also has a display output category, portable device dependent, whereas the MI355X has no outputs at all.

Workloads that rely on graphics rendering, ray tracing, tensor operations, or mobile deployment should use the RTX 3500 Mobile. Workloads that rely on massive memory pools, extreme bandwidth, or raw FP32 and FP16 compute in a fixed installation should use the MI355X. The data does not indicate any overlap in these use cases.