AMD Instinct MI300A vs NVIDIA GeForce RTX 4080 SUPER Comparison

The Verdict

The data presents a stark contrast between two accelerators designed for entirely different workloads. The AMD Instinct MI300A is a data-center compute accelerator with no display outputs and no graphics API support, while the NVIDIA GeForce RTX 4080 SUPER is a consumer graphics card with full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support. The RTX 4080 SUPER holds a 86th percentile ranking among all GPUs, whereas the MI300A sits at the 50th percentile, though the MI300A has no recorded benchmark scores in the database. The RTX 4080 SUPER delivers an average benchmark score of 54209, while the MI300A records 0. For any workload involving graphics rendering, gaming, or standard GPU compute with consumer APIs, the RTX 4080 SUPER is the clear choice. The MI300A, with its 128 GB of HBM3 memory and 5.32 TB/s bandwidth, targets massive-scale compute tasks, but the absence of benchmark data means its real-world performance cannot be quantified here. The RTX 4080 SUPER also has a launch MSRP of 999 USD, but the MI300A has no listed launch price.

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. The RTX 4080 SUPER uses Ada Lovelace on the AD103 chip, also on a 5 nm TSMC process, but with 45,900 million transistors on a 379 mm² die. The MI300A's transistor density is 150.4M per mm², compared to 121.1M per mm² for the RTX 4080 SUPER. The MI300A has 14,592 shading units and 912 texture mapping units, but no ROPs, resulting in a pixel rate of 0 MPixel/s. The RTX 4080 SUPER has 10,240 shading units, 320 TMUs, 112 ROPs, 80 ray tracing cores, and 320 tensor cores, delivering 285.6 GPixel/s and 816.0 GTexel/s. The MI300A's texture rate is 1,915.2 GTexel/s, significantly higher than the RTX 4080 SUPER's. The MI300A has no ray tracing cores and no tensor cores listed, while the RTX 4080 SUPER includes both. The MI300A supports no DirectX, OpenGL, or Vulkan APIs, whereas the RTX 4080 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The RTX 4080 SUPER wins decisively in any graphics-oriented task. Its 80 ray tracing cores and 320 tensor cores enable hardware-accelerated ray tracing and AI-enhanced features, while its 112 ROPs deliver 285.6 GPixel/s of pixel throughput. The card's display outputs, including 1x HDMI 2.1 and 3x DisplayPort 1.4a, make it suitable for direct display connection. The MI300A has no display outputs and no graphics API support, making it unsuitable for rendering to a screen. In compute-oriented workloads, the MI300A's raw specifications suggest superiority: its 61.29 TFLOPS of FP32 performance exceeds the RTX 4080 SUPER's 52.22 TFLOPS. The MI300A's 128 GB of HBM3 memory on an 8192-bit bus delivers 5.32 TB/s of bandwidth, dwarfing the RTX 4080 SUPER's 16 GB of GDDR6X on a 256-bit bus at 736.3 GB/s. However, the MI300A has no benchmark scores in the database, so these specifications cannot be validated against measured performance. The RTX 4080 SUPER's benchmark results include a 3DMark Steel Nomad DX12 score of 6600, a Geekbench OpenCL score of 219065, a Geekbench Vulkan score of 260075, and Passmark scores across DirectX 9, 10, 11, 12, G2D, G3D, and GPU compute tests.

FAQ

Q: Which accelerator has more memory and bandwidth?

A: The AMD Instinct MI300A has 128 GB of HBM3 memory with an 8192-bit bus and 5.32 TB/s bandwidth, compared to the NVIDIA GeForce RTX 4080 SUPER's 16 GB of GDDR6X on a 256-bit bus at 736.3 GB/s.

Q: Does the MI300A support graphics APIs?

A: No, the MI300A lists DirectX, OpenGL, and Vulkan as N/A, and it has no display outputs. The RTX 4080 SUPER supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: What is the FP32 performance difference?

A: The MI300A delivers 61.29 TFLOPS of FP32, while the RTX 4080 SUPER delivers 52.22 TFLOPS. The MI300A also has a higher texture rate at 1,915.2 GTexel/s versus 816.0 GTexel/s.

Q: How does the RTX 4080 SUPER compare to its nearest rivals in the database?

A: The RTX 4080 SUPER's average score of 54209 is 0.1% below the RTX 4080 at 54247, 1.1% below the Radeon Pro W5700X at 54828, 2.7% below the Radeon RX 6750 GRE 12 GB at 55698, and 2.8% below the Radeon 8060S at 55757.

Q: What are the power requirements?

A: The MI300A has a 750 W TDP and a suggested PSU of 1150 W, while the RTX 4080 SUPER has a 320 W TDP and a suggested PSU of 700 W. The MI300A uses an OAM module slot with no power connectors listed, while the RTX 4080 SUPER uses a triple-slot design with a 1x 16-pin connector.

Q: Which has more shading units and TMUs?

A: The MI300A has 14,592 shading units and 912 TMUs, while the RTX 4080 SUPER has 10,240 shading units and 320 TMUs. However, the MI300A has 0 ROPs and a 0 MPixel/s pixel rate, whereas the RTX 4080 SUPER has 112 ROPs.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark comparisons between the MI300A and the RTX 4080 SUPER. The MI300A has no recorded benchmark scores at all, with an average benchmark score of 0 and zero wins in the head-to-head data. The RTX 4080 SUPER, by contrast, has a comprehensive set of benchmark results. Its 3DMark Steel Nomad DX12 score of 6600 demonstrates strong modern DirectX 12 gaming performance. In Geekbench, the card scores 219065 in OpenCL and 260075 in Vulkan, indicating robust compute and graphics API performance. Passmark results show 193 in DirectX 10, 301 in DirectX 11, 134 in DirectX 12, and 381 in DirectX 9, with a G2D score of 1270 and a G3D score of 34245. The GPU compute score of 19822 further confirms its compute capabilities. The RTX 4080 SUPER's nearest rivals in the database are the RTX 4080 at 54247 (0.1% higher), the Radeon Pro W5700X at 54828 (1.1% higher), the Radeon RX 6750 GRE 12 GB at 55698 (2.7% higher), and the Radeon 8060S at 55757 (2.8% higher). These deltas show that the RTX 4080 SUPER sits very close to its closest competitor, the RTX 4080, with less than a percentage point separating them. The lack of any benchmark data for the MI300A means that no direct numerical comparison is possible between the two accelerators in the database.

Specification Differences

The two devices differ across nearly every specification category. The MI300A uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the RTX 4080 SUPER uses Ada Lovelace with the AD103 chip. Both use a 5 nm TSMC process, but the MI300A packs 153,000 million transistors versus 45,900 million for the RTX 4080 SUPER. The die sizes are 1017 mm² for the MI300A and 379 mm² for the RTX 4080 SUPER, with transistor densities of 150.4M per mm² and 121.1M per mm² respectively. Clock speeds differ substantially: the MI300A has a base clock of 1000 MHz and a boost of 2100 MHz, while the RTX 4080 SUPER has a base of 2295 MHz and a boost of 2550 MHz. Memory clocks are 1300 MHz (5.2 Gbps effective) for the MI300A and 1438 MHz (23 Gbps effective) for the RTX 4080 SUPER. The MI300A has 14,592 shading units, 912 TMUs, and 0 ROPs, while the RTX 4080 SUPER has 10,240 shading units, 320 TMUs, and 112 ROPs. The MI300A has no ray tracing cores or tensor cores listed, whereas the RTX 4080 SUPER has 80 RT cores and 320 tensor cores. Pixel rate is 0 MPixel/s for the MI300A and 285.6 GPixel/s for the RTX 4080 SUPER. Texture rates are 1,915.2 GTexel/s versus 816.0 GTexel/s. FP32 performance is 61.29 TFLOPS for the MI300A and 52.22 TFLOPS for the RTX 4080 SUPER, with the RTX 4080 SUPER also listing FP16 at 52.22 TFLOPS (1:1). TDP is 750 W for the MI300A and 320 W for the RTX 4080 SUPER, with suggested PSUs of 1150 W and 700 W respectively. The MI300A uses an OAM module slot with no power connectors and no display outputs, while the RTX 4080 SUPER is a triple-slot card with a 1x 16-pin power connector and 1x HDMI 2.1 plus 3x DisplayPort 1.4a outputs. Bus interfaces are PCIe 5.0 x16 for the MI300A and PCIe 4.0 x16 for the RTX 4080 SUPER. The RTX 4080 SUPER measures 310 mm by 140 mm by 61 mm, while the MI300A has no listed dimensions. Release dates are 2023-12-05 for the MI300A and 2024-01-30 for the RTX 4080 SUPER. The RTX 4080 SUPER is marked end-of-life with a successor in the GeForce 50 series, while the MI300A has no listed production status or successor.