AMD Instinct MI300A vs AMD Radeon RX 6450M Comparison

Head-to-Head Benchmarks

The recorded database contains no head-to-head benchmark entries for the AMD Instinct MI300A versus the AMD Radeon RX 6450M. With zero wins recorded for either side, the quantitative comparison rests entirely on the architectural and specification data captured in the database. The MI300A delivers a peak FP32 throughput of 61.29 TFLOPS, while the RX 6450M produces 3.779 TFLOPS. That difference places the MI300A roughly 16 times higher in raw shader math, a gap driven by the former's 14,592 shading units against the latter's 768. Texture rate follows the same pattern: the MI300A reaches 1,915.2 GTexel/s, while the RX 6450M manages 118.1 GTexel/s, a ratio of approximately 16.2 to 1.

Memory bandwidth further separates the two. The MI300A uses 128 GB of HBM3 on an 8192-bit bus, yielding 5.32 TB/s. The RX 6450M carries 4 GB of GDDR6 on a 64-bit bus, yielding 128.0 GB/s. The MI300A's bandwidth advantage is roughly 41.6 times greater. Pixel throughput inverts the trend: the MI300A reports 0 MPixel/s because it has no raster output units, while the RX 6450M delivers 78.72 GPixel/s from its 32 ROPs. That makes the RX 6450M the only one of the pair capable of traditional rasterized display output, a direct consequence of the MI300A's compute-oriented design.

Clock speeds show a different relationship. The RX 6450M runs a 2000 MHz base and 2460 MHz boost, with a 2220 MHz game clock. The MI300A runs a 1000 MHz base and 2100 MHz boost. The RX 6450M holds a 360 MHz advantage at boost, yet the MI300A's massive shader count overcomes that frequency deficit in aggregate throughput. Memory clocks also favor the RX 6450M at 16 Gbps effective versus 5.2 Gbps effective for the MI300A, but again the bus width difference reverses the effective bandwidth outcome.

Architecture Differences

The MI300A uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, built on a 5 nm process at TSMC with 153,000 million transistors on a 1017 mm² die. Transistor density reaches 150.4M per mm². The RX 6450M uses the RDNA 2.0 architecture on the Navi 24 chip, built on a 6 nm process at TSMC with 5,400 million transistors on a 107 mm² die, giving a density of 50.5M per mm². The MI300A packs roughly 28.3 times the transistor count and a die nearly 9.5 times larger.

The MI300A belongs to the Instinct (MIx) generation with a release date of 2023-12-05, while the RX 6450M is part of the Radeon RX 6000 series, specifically the Navi Mobile (RX 6000M) generation, released 2023-01-03. The MI300A's predecessor is listed as Radeon Instinct; the RX 6450M's predecessor is Polaris Mobile. Both share AMD as manufacturer and TSMC as foundry.

Shading units differ by a factor of 19: 14,592 versus 768. Texture mapping units differ by a factor of 19 as well: 912 versus 48. The MI300A has 0 ROPs, while the RX 6450M has 32. The RX 6450M includes 12 ray tracing cores; the MI300A lists no ray tracing core count. Neither lists tensor cores. The MI300A reports no API support for DirectX, OpenGL, or Vulkan, all marked N/A. The RX 6450M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Memory architecture diverges completely. The MI300A uses HBM3 with 8192-bit bus width and 5.32 TB/s bandwidth, while the RX 6450M uses GDDR6 with 64-bit bus width and 128.0 GB/s. The MI300A has no display outputs; the RX 6450M has portable device dependent outputs. The MI300A uses an OAM Module slot width with no power connectors and a suggested PSU of 1150 W. The RX 6450M uses an IGP slot width with no power connectors and no suggested PSU listed. The bus interface is PCIe 5.0 x16 for the MI300A and PCIe 4.0 x4 for the RX 6450M. Power draw is 750 W for the MI300A versus 50 W for the RX 6450M.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI300A delivers 61.29 TFLOPS FP32, while the AMD Radeon RX 6450M delivers 3.779 TFLOPS. The MI300A's count is approximately 16.2 times higher.

Q: How do memory capacities and bandwidth compare?

A: The MI300A has 128 GB of HBM3 with 5.32 TB/s bandwidth across an 8192-bit bus. The RX 6450M has 4 GB of GDDR6 with 128.0 GB/s bandwidth across a 64-bit bus. The MI300A provides roughly 41.6 times the bandwidth.

Q: Can both GPUs render to a display?

A: No. The MI300A has no display outputs and reports 0 MPixel/s pixel rate. The RX 6450M has portable device dependent display outputs and delivers 78.72 GPixel/s pixel rate.

Q: What process nodes do the two chips use?

A: The MI300A uses a 5 nm process at TSMC with 153,000 million transistors on a 1017 mm² die. The RX 6450M uses a 6 nm process at TSMC with 5,400 million transistors on a 107 mm² die.

Q: Which GPU has ray tracing support?

A: The RX 6450M includes 12 ray tracing cores. The MI300A lists no ray tracing core count in the database.

Q: What are the power requirements?

A: The MI300A has a TDP of 750 W with a suggested PSU of 1150 W. The RX 6450M has a TDP of 50 W with no suggested PSU listed.

Specification Differences

| Field | AMD Instinct MI300A | AMD Radeon RX 6450M |

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

| Chip | Aqua Vanjaram | Navi 24 |

| Architecture | CDNA 3.0 | RDNA 2.0 |

| Generation | Instinct (MIx) | Navi Mobile (RX 6000M) |

| Process Node | 5 nm | 6 nm |

| Transistors | 153,000 million | 5,400 million |

| Die Size | 1017 mm² | 107 mm² |

| Transistor Density | 150.4M / mm² | 50.5M / mm² |

| Base Clock | 1000 MHz | 2000 MHz |

| Boost Clock | 2100 MHz | 2460 MHz |

| Game Clock | None | 2220 MHz |

| Memory Clock | 1300 MHz, 5.2 Gbps effective | 2000 MHz, 16 Gbps effective |

| Memory Size | 128 GB | 4 GB |

| Memory Type | HBM3 | GDDR6 |

| Memory Bus Width | 8192 bit | 64 bit |

| Memory Bandwidth | 5.32 TB/s | 128.0 GB/s |

| Shading Units | 14592 | 768 |

| TMUs | 912 | 48 |

| ROPs | 0 | 32 |

| Ray Tracing Cores | None listed | 12 |

| Pixel Rate | 0 MPixel/s | 78.72 GPixel/s |

| Texture Rate | 1,915.2 GTexel/s | 118.1 GTexel/s |

| FP32 | 61.29 TFLOPS | 3.779 TFLOPS |

| FP16 | None listed | 7.557 TFLOPS (2:1) |

| TDP | 750 W | 50 W |

| Slot Width | OAM Module | IGP |

| Suggested PSU | 1150 W | None |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x4 |

| 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 | 2023-01-03 |

| Production Status | None listed | Active |

Where Each One Wins

The AMD Instinct MI300A wins decisively in compute-heavy workloads. Its 61.29 TFLOPS FP32 throughput, 1,915.2 GTexel/s texture rate, and 5.32 TB/s memory bandwidth position it for data center scale parallel computation, large model inference, and memory-bandwidth-bound scientific workloads. The 128 GB HBM3 pool with an 8192-bit interface provides capacity and bandwidth that no mobile GPU can approach. The PCIe 5.0 x16 interface and OAM Module form factor indicate a server-oriented accelerator designed for multi-GPU nodes rather than standalone rendering. The absence of display outputs and raster units confirms that the MI300A targets compute arrays, not graphics pipelines.

The AMD Radeon RX 6450M wins in client-side graphics and mobile integration. Its 32 ROPs and 78.72 GPixel/s pixel rate enable actual display output, which the MI300A cannot perform. The 12 ray tracing cores support hardware-accelerated ray traced effects in games, a feature entirely absent from the MI300A's recorded feature set. The RX 6450M runs at higher clocks: 2460 MHz boost versus 2100 MHz, and 2000 MHz base versus 1000 MHz. Its 6 nm process and 50 W TDP fit into a portable device form factor, while the MI300A requires a 1150 W suggested PSU. The RX 6450M supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 APIs, making it compatible with standard graphics software stacks. The MI300A reports no API support for any of those interfaces.

The RX 6450M also wins on FP16 throughput when measured per watt, delivering 7.557 TFLOPS at 50 W, but the MI300A's FP16 figure is not recorded in the database. The RX 6450M's PCIe 4.0 x4 interface suits bandwidth-light tasks such as gaming and media rendering, while the MI300A's PCIe 5.0 x16 interface suits high-throughput data movement. The production status of the RX 6450M is Active, while the MI300A's production status is not listed.

In terms of release timing, the RX 6450M launched on 2023-01-03, roughly 11 months before the MI300A's 2023-12-05 release. Both GPUs sit at the 50th percentile among all GPUs in the database, but that percentile reflects the absence of benchmark scores for either unit. The data shows two completely different design intents: the MI300A maximizes raw compute density and memory bandwidth at extreme power and physical footprint, while the RX 6450M prioritizes low power, display capability, and API compatibility for mobile devices. Each wins exactly where the other cannot compete.