AMD Instinct MI300A vs NVIDIA RTX 4000 Mobile Ada Generation Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark results for the AMD Instinct MI300A and the NVIDIA RTX 4000 Mobile Ada Generation. Both entries report an average benchmark score of 0, and their percentile rankings against all GPUs are identical at 50. The absence of measured scores means the comparison must rely entirely on architectural and specification data.

Raw compute figures show a clear split. The AMD Instinct MI300A delivers 61.29 TFLOPS of FP32 throughput, while the NVIDIA RTX 4000 Mobile Ada Generation reaches 24.72 TFLOPS. That puts the AMD part at roughly 2.48 times the FP32 rate of the NVIDIA part. Texture rate follows a similar pattern: the MI300A processes 1,915.2 GTexel/s against 386.3 GTexel/s for the RTX 4000 Mobile, a ratio of about 4.96 to 1. Pixel rate inverts the comparison entirely, as the MI300A records 0 MPixel/s while the RTX 4000 Mobile manages 133.2 GPixel/s, so the NVIDIA part is the only one of the two with any rasterization output capability.

Memory bandwidth heavily favors the AMD accelerator. The MI300A has 5.32 TB/s of bandwidth across an 8192-bit HBM3 interface, versus 432.0 GB/s on a 192-bit GDDR6 bus for the RTX 4000 Mobile. The AMD solution also carries 128 GB of memory, more than ten times the 12 GB on the NVIDIA part. Clock behavior differs as well: the MI300A runs at a 1000 MHz base and 2100 MHz boost, while the RTX 4000 Mobile uses a 1290 MHz base and 1665 MHz boost, so the NVIDIA GPU starts higher but tops out lower.

Where Each One Wins

The AMD Instinct MI300A wins on raw compute throughput, memory capacity, memory bandwidth, and transistor scale. Its FP32 figure of 61.29 TFLOPS nearly doubles the 24.72 TFLOPS of the RTX 4000 Mobile, and its 5.32 TB/s memory bandwidth is more than twelve times the 432.0 GB/s available to the NVIDIA part. The 128 GB HBM3 pool dwarfs the 12 GB GDDR6 buffer, which matters for workloads that need large resident datasets. Texture throughput also favors AMD decisively at 1,915.2 GTexel/s versus 386.3 GTexel/s.

The NVIDIA RTX 4000 Mobile Ada Generation wins on rasterization features, API support, and power efficiency. Its 80 ROPs and 133.2 GPixel/s pixel rate give it actual display and raster output capability, whereas the MI300A has no ROPs and no display outputs at all. The NVIDIA part supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the AMD accelerator reports N/A for all three APIs. The RTX 4000 Mobile also carries 58 RT cores and 232 tensor cores, features entirely absent from the MI300A specification. Power draw differs substantially: the MI300A is rated at 750 W with a suggested PSU of 1150 W, while the RTX 4000 Mobile sits at 110 W with no suggested PSU listed.

The form factors define different deployment targets. The MI300A ships as an OAM Module with no power connectors and no display outputs, indicating a server-oriented accelerator. The RTX 4000 Mobile is an IGP with portable-device-dependent display outputs, placing it inside laptops or mobile workstations. The bus interfaces also differ, with the MI300A using PCIe 5.0 x16 and the RTX 4000 Mobile using PCIe 4.0 x16.

Architecture Differences

The two chips come from different manufacturers and architectural families. AMD builds the MI300A on CDNA 3.0 with the Aqua Vanjaram chip, while NVIDIA uses Ada Lovelace with the AD104 die. Both use a 5 nm process at TSMC, but the transistor counts diverge sharply: the MI300A contains 153,000 million transistors on a 1017 mm² die, giving a density of 150.4M transistors per mm². The RTX 4000 Mobile packs 35,800 million transistors onto 294 mm², for a density of 121.8M per mm². The AMD die is more than three times larger in area and holds more than four times the transistor count.

Core configuration differs across every unit type. The MI300A has 14,592 shading units, 912 TMUs, and no ROPs. The RTX 4000 Mobile has 7,424 shading units, 232 TMUs, and 80 ROPs. The NVIDIA part additionally includes 58 RT cores and 232 tensor cores, neither of which appears in the AMD specification. Memory architecture is also divergent: HBM3 on a 8192-bit bus for AMD, GDDR6 on a 192-bit bus for NVIDIA. Memory clock rates reflect the different technologies, with the AMD part listing 1300 MHz at 5.2 Gbps effective and the NVIDIA part at 2250 MHz at 18 Gbps effective.

The FP16 situation separates the two as well. The RTX 4000 Mobile explicitly lists FP16 at 24.72 TFLOPS with a 1:1 ratio to FP32. The MI300A lists no FP16 figure in the database. The AMD accelerator also reports zero pixel rate, zero ROPs, and no API support, reinforcing its compute-focused design. The NVIDIA part reports full raster and API capability, including DirectX 12 Ultimate.

Release timing is close but not identical. The RTX 4000 Mobile launched on 2023-03-20, while the MI300A followed on 2023-12-05. The NVIDIA part has an active production status and lists its predecessor as Ampere-MW and successor as Blackwell-MW. The AMD part lists Radeon Instinct as its predecessor with no successor recorded.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI300A delivers 61.29 TFLOPS, which is roughly 2.48 times the 24.72 TFLOPS of the NVIDIA RTX 4000 Mobile Ada Generation.

Q: Which part supports ray tracing and tensor operations?

A: Only the NVIDIA RTX 4000 Mobile Ada Generation lists these features, with 58 RT cores and 232 tensor cores. The AMD Instinct MI300A records no RT cores and no tensor cores.

Q: How do the memory configurations compare?

A: The MI300A has 128 GB of HBM3 on a 8192-bit bus with 5.32 TB/s bandwidth. The RTX 4000 Mobile has 12 GB of GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth.

Q: Which GPU can output to displays?

A: The NVIDIA RTX 4000 Mobile has display outputs described as portable device dependent. The AMD Instinct MI300A lists no display outputs.

Q: What API support does each GPU provide?

A: The RTX 4000 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300A reports N/A for DirectX, OpenGL, and Vulkan.

Q: What is the power requirement difference?

A: The MI300A is rated at 750 W with a suggested PSU of 1150 W. The RTX 4000 Mobile is rated at 110 W with no suggested PSU listed.

The Verdict

The recorded data places these two parts in entirely separate segments despite both being 5 nm TSMC products. The AMD Instinct MI300A is a compute accelerator built for massive throughput and memory capacity, evidenced by 61.29 TFLOPS FP32, 128 GB of HBM3, 5.32 TB/s bandwidth, and a 750 W power envelope in an OAM Module form factor. It has no display outputs, no rasterization hardware, and no graphics API support, so it cannot function as a conventional graphics card.

The NVIDIA RTX 4000 Mobile Ada Generation is a mobile GPU with full raster and API capabilities. Its 80 ROPs, 133.2 GPixel/s pixel rate, 58 RT cores, 232 tensor cores, DirectX 12 Ultimate support, and portable-device-dependent display outputs make it suitable for graphics rendering, ray tracing, and AI workloads inside a laptop. Its 110 W TDP and IGP form factor fit power-constrained mobile systems.

The choice between the two depends on the workload type. Data center compute, large-scale matrix operations, and memory-bound tasks align with the MI300A, which holds a 2.48x FP32 advantage and a 12.3x memory bandwidth advantage. Client graphics, real-time rendering, and portable deployment align with the RTX 4000 Mobile, which is the only one of the two with pixel output, API support, and ray tracing hardware. The MI300A uses PCIe 5.0 x16 while the RTX 4000 Mobile uses PCIe 4.0 x16, a further indication of their different host environments.

Specification Differences

| Field | AMD Instinct MI300A | NVIDIA RTX 4000 Mobile Ada Generation |

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

| Architecture | CDNA 3.0 | Ada Lovelace |

| Chip | Aqua Vanjaram | AD104 |

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

| Die Size | 1017 mm² | 294 mm² |

| Transistor Density | 150.4M / mm² | 121.8M / mm² |

| Base Clock | 1000 MHz | 1290 MHz |

| Boost Clock | 2100 MHz | 1665 MHz |

| Memory Size | 128 GB | 12 GB |

| Memory Type | HBM3 | GDDR6 |

| Memory Bus Width | 8192 bit | 192 bit |

| Memory Bandwidth | 5.32 TB/s | 432.0 GB/s |

| Shading Units | 14592 | 7424 |

| TMUs | 912 | 232 |

| ROPs | 0 | 80 |

| RT Cores | None | 58 |

| Tensor Cores | None | 232 |

| Pixel Rate | 0 MPixel/s | 133.2 GPixel/s |

| Texture Rate | 1,915.2 GTexel/s | 386.3 GTexel/s |

| FP32 | 61.29 TFLOPS | 24.72 TFLOPS |

| TDP | 750 W | 110 W |

| Slot Width | OAM Module | IGP |

| Suggested PSU | 1150 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 | 2023-12-05 | 2023-03-20 |

| Production Status | Not listed | Active |

| Predecessor | Radeon Instinct | Ampere-MW |

| Successor | None listed | Blackwell-MW |