AMD Radeon Instinct MI300X vs NVIDIA GeForce RTX 5080 SUPER Comparison

Head-to-Head Benchmarks

The recorded data shows no direct head-to-head benchmark results between the AMD Radeon Instinct MI300X and the NVIDIA GeForce RTX 5080 SUPER. The database contains no shared test scores for these two accelerators. Consequently, any comparison must rely on the architectural specifications and the single benchmark entry available for the RTX 5080 SUPER.

The RTX 5080 SUPER has one recorded benchmark result: a 3DMark Steel Nomad DX12 score of 3075. This places the card at the 19th percentile among all GPUs in the database. Its nearest rivals show a tight cluster of performance: the NVIDIA Quadro P1000 scores 3163, which is 2.8% higher than the RTX 5080 SUPER, and the Intel Arc Pro B60 scores 3182, which is 3.4% higher. Conversely, the NVIDIA GeForce 820A scores 2983, which is 3.1% lower, and the NVIDIA GeForce GTX 860M scores 2967, which is 3.6% lower. These deltas indicate that the RTX 5080 SUPER sits in a narrow band where a few percentage points separate it from both slower and faster entries in the database.

The AMD Radeon Instinct MI300X has no benchmark scores recorded. Its percentile versus all GPUs is listed at 50, which is a neutral midpoint, but there is no measured performance data to substantiate any ranking. The average benchmark score for the MI300X is zero, and the nearest rivals array is empty. Therefore, no head-to-head wins can be assigned to either product, as the wins counter shows zero for both items.

What the data does permit is a comparison of peak theoretical throughput. The MI300X delivers 81.72 TFLOPS of FP32 compute, while the RTX 5080 SUPER delivers 56.28 TFLOPS. That places the AMD part roughly 45% ahead in raw single-precision floating-point capacity. In FP16, the divergence is more dramatic: the MI300X lists 653.7 TFLOPS using an 8:1 ratio, whereas the RTX 5080 SUPER lists 56.28 TFLOPS at a 1:1 ratio. The AMD accelerator offers more than eleven times the half-precision throughput, though the architectural ratios differ, so these figures are not directly equivalent workloads.

Memory bandwidth tells a similar story. The MI300X has 10.3 TB/s of bandwidth from its HBM3 memory, while the RTX 5080 SUPER has 1.02 TB/s from GDDR7. The AMD part provides roughly ten times the memory bandwidth. Texture rate also favors AMD: 2,553.6 GTexel/s versus 879.3 GTexel/s. Pixel rate is an outlier, as the MI300X reports zero megapixels per second, while the RTX 5080 SUPER reports 293.1 GPixel/s, a direct consequence of the former lacking raster output units.

FAQ

Q: Which product has more shading units?

A: The AMD Radeon Instinct MI300X has 19,456 shading units, while the NVIDIA GeForce RTX 5080 SUPER has 10,752. The AMD part has roughly 81% more shading units.

Q: What is the memory capacity difference?

A: The MI300X carries 192 GB of HBM3 memory across an 8192-bit bus. The RTX 5080 SUPER carries 24 GB of GDDR7 memory across a 256-bit bus. The AMD part offers eight times the capacity.

Q: Does the RTX 5080 SUPER support ray tracing?

A: Yes. The RTX 5080 SUPER includes 84 ray tracing cores. The MI300X lists no ray tracing cores in the database.

Q: Which product has a higher boost clock?

A: The RTX 5080 SUPER boosts to 2617 MHz, while the MI300X boosts to 2100 MHz. The NVIDIA card runs about 25% higher boost clock.

Q: What is the transistor count difference?

A: The MI300X has 153,000 million transistors on a 1017 mm² die. The RTX 5080 SUPER has 45,600 million transistors on a 378 mm² die. The AMD chip contains more than three times the transistor count.

Q: What API support does each product have?

A: The RTX 5080 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300X lists no API support entries in the database.

Architecture Differences

The two accelerators come from fundamentally different design philosophies. The AMD Radeon Instinct MI300X uses the CDNA 3.0 architecture, built for data center compute workloads. The chip is codenamed Aqua Vanjaram and belongs to the Radeon Instinct (MIx) generation. It has no display outputs, no raster output units, and no ray tracing cores, which indicates a pure compute accelerator. The NVIDIA GeForce RTX 5080 SUPER uses the Blackwell 2.0 architecture on the GB203 chip, part of the GeForce 50 series. This is a client graphics card with 112 raster output units, 84 ray tracing cores, and 336 tensor cores, plus display outputs including 1x HDMI 2.1b and 3x DisplayPort 2.1b.

The MI300X is built on a 5 nm process at TSMC, using 153,000 million transistors on a 1017 mm² die. That yields a transistor density of 150.4 million per square millimeter. The RTX 5080 SUPER also uses a 5 nm process at TSMC, but with 45,600 million transistors on a 378 mm² die, for a density of 120.6 million per square millimeter. Both use the same foundry and node, but AMD packs far more silicon and transistors into its package.

Memory architecture diverges sharply. The MI300X uses HBM3 with 192 GB capacity, an 8192-bit bus, and 10.3 TB/s bandwidth. The RTX 5080 SUPER uses GDDR7 with 24 GB capacity, a 256-bit bus, and 1.02 TB/s bandwidth. HBM3 is stacked memory designed for bandwidth-hungry data center workloads, while GDDR7 is a more conventional discrete memory solution for client graphics. The MI300X has no power connectors and uses an OAM Module slot width, while the RTX 5080 SUPER uses a dual-slot design with a single 16-pin connector.

Compute feature sets differ as well. The MI300X lists FP16 performance at 653.7 TFLOPS with an 8:1 ratio, indicating a specialized path for half-precision tensor work. The RTX 5080 SUPER lists FP16 at 56.28 TFLOPS with a 1:1 ratio, meaning its half-precision and single-precision rates match. The NVIDIA card also includes tensor cores and ray tracing cores, which are absent from the AMD data. The MI300X has a texture rate of 2,553.6 GTexel/s versus 879.3 GTexel/s for the RTX 5080 SUPER, but the AMD part has zero pixel rate due to having no ROPs.

Specification Differences

The two products differ across nearly every measurable specification. The MI300X has a base clock of 1000 MHz and a boost clock of 2100 MHz. The RTX 5080 SUPER has a base clock of 2295 MHz and a boost clock of 2617 MHz. The NVIDIA part runs at substantially higher frequencies.

Memory specifications diverge completely. The MI300X uses 192 GB of HBM3 with a 2525 MHz memory clock, effective 10.1 Gbps, on an 8192-bit bus, delivering 10.3 TB/s. The RTX 5080 SUPER uses 24 GB of GDDR7 with a 2000 MHz memory clock, effective 32 Gbps, on a 256-bit bus, delivering 1.02 TB/s.

Shading units count 19,456 for AMD versus 10,752 for NVIDIA. Texture mapping units number 1,216 for AMD versus 336 for NVIDIA. Raster output units are 0 for AMD versus 112 for NVIDIA. The RTX 5080 SUPER has 84 ray tracing cores and 336 tensor cores; the MI300X has neither listed.

Pixel rate is 0 MPixel/s for AMD versus 293.1 GPixel/s for NVIDIA. Texture rate is 2,553.6 GTexel/s for AMD versus 879.3 GTexel/s for NVIDIA. FP32 compute is 81.72 TFLOPS for AMD versus 56.28 TFLOPS for NVIDIA. FP16 is 653.7 TFLOPS (8:1) for AMD versus 56.28 TFLOPS (1:1) for NVIDIA.

Power draw differs significantly: the MI300X has a TDP of 750 W with a suggested PSU of 1150 W, while the RTX 5080 SUPER has a TDP of 415 W with no suggested PSU listed. The MI300X is an OAM Module with no power connectors and no display outputs. The RTX 5080 SUPER is dual-slot, uses one 16-pin connector, and has 1x HDMI 2.1b plus 3x DisplayPort 2.1b. Dimensions also differ: the RTX 5080 SUPER measures 304 mm in length, 137 mm in height, and 40 mm in width; the MI300X has no dimensions recorded.

The RTX 5080 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300X has no API support entries. The RTX 5080 SUPER has a release date of 2025-12-31 and a production status of Active, while the MI300X released 2023-12-05 with no production status recorded. The NVIDIA card has a launch MSRP of 999 USD; the AMD part has no MSRP listed.

Where Each One Wins

The AMD Radeon Instinct MI300X wins decisively in raw compute throughput. Its 81.72 TFLOPS of FP32 is roughly 45% higher than the RTX 5080 SUPER's 56.28 TFLOPS. In FP16, the MI300X lists 653.7 TFLOPS versus 56.28 TFLOPS, an elevenfold advantage, though the 8:1 versus 1:1 ratio means the comparison is not apples-to-apples for all workloads. The MI300X also wins on memory capacity (192 GB versus 24 GB), memory bandwidth (10.3 TB/s versus 1.02 TB/s), and memory bus width (8192-bit versus 256-bit). Texture rate favors AMD at 2,553.6 GTexel/s versus 879.3 GTexel/s. These specifications point to workloads that saturate memory and compute, such as large model training or inference with massive in-memory datasets.

The NVIDIA GeForce RTX 5080 SUPER wins in several client-oriented categories. It has a higher boost clock (2617 MHz versus 2100 MHz), a higher base clock (2295 MHz versus 1000 MHz), and a lower TDP (415 W versus 750 W). It includes ray tracing cores (84), tensor cores (336), and raster output units (112), none of which are present in the MI300X data. Pixel rate is 293.1 GPixel/s versus 0 for AMD. The RTX 5080 SUPER also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI300X has no API support recorded. The NVIDIA card has display outputs, making it usable for direct video output, whereas the MI300X has none.

The single benchmark score for the RTX 5080 SUPER shows it performs within a few percentage points of the Quadro P1000 and Intel Arc Pro B60, and slightly ahead of the GeForce 820A and GTX 860M. This suggests its real-world 3DMark performance is modest relative to its specification sheet, at least in the database's recorded test.

The Verdict

The data presents two entirely different products despite the shared 5 nm TSMC process. The AMD Radeon Instinct MI300X is a data center compute accelerator with no display output, no raster pipeline, and enormous memory and compute resources. Its 192 GB of HBM3, 10.3 TB/s bandwidth, and 81.72 TFLOPS FP32 make it suited for memory-bound and compute-heavy workloads where capacity and throughput matter more than clock speed or graphics features. The lack of any benchmark scores in the database means its real-world performance cannot be verified from the recorded data, but the architectural numbers indicate a design aimed at server racks, not desktops.

The NVIDIA GeForce RTX 5080 SUPER is a client graphics card with full display support, ray tracing, tensor cores, and a conventional 24 GB GDDR7 memory configuration. Its 415 W TDP and dual-slot form factor fit standard PC environments. The recorded 3DMark Steel Nomad score of 3075 places it at the 19th percentile, with nearest rivals within a range of roughly 3.6% lower to 3.4% higher. That benchmark result suggests its actual measured performance is not exceptional relative to the broader database, despite the high boost clock and modern architecture.

For compute throughput, memory capacity, and bandwidth, the MI300X is the clear choice from the specification data. For graphics rendering, ray tracing, display output, and lower power consumption, the RTX 5080 SUPER is the only option with the required features. The selection depends on workload type: data center acceleration favors AMD, while client graphics and API support favor NVIDIA. The 999 USD launch MSRP for the RTX 5080 SUPER provides a reference point, but no equivalent price exists for the MI300X in the database.