AMD Instinct MI308X vs NVIDIA RTX 6000D Comparison

Head-to-Head Benchmarks

The recorded data contains no direct head-to-head benchmark comparisons between the AMD Instinct MI308X and the NVIDIA RTX 6000D. The database lists zero benchmark entries for the AMD part, meaning its average benchmark score is recorded as zero, and its percentile versus all GPUs sits at 50. The NVIDIA RTX 6000D, by contrast, carries two recorded benchmark scores: a 3DMark Steel Nomad DX12 result of 3522 and a Geekbench OpenCL score of 388405. Its average benchmark score across these entries is 195964, placing it in the 98th percentile of all GPUs in the database.

The absence of data for the MI308X makes a direct numerical comparison impossible. However, the RTX 6000D's nearest rivals provide context for its performance tier. The NVIDIA Tesla V100S PCIe 32 GB scores an average of 194415, which is 0.8% below the RTX 6000D. The NVIDIA A100 SXM4 40 GB averages 187147, sitting 4.7% lower. The NVIDIA A100 PCIe 80 GB averages 207124, which is 5.4% higher than the RTX 6000D. The NVIDIA RTX 5000 Ada Generation averages 184664, trailing the RTX 6000D by 6.1%. These deltas indicate the RTX 6000D sits in a competitive band among high-end accelerators, outperforming the V100S and A100 SXM4 while falling slightly behind the A100 PCIe 80 GB in aggregate scoring.

Because the MI308X has no recorded benchmarks, its wins column shows zero, matching the RTX 6000D's zero wins in head-to-head tests. The data does not support any claim of superiority for either part based on measured performance. What the data does show is that the RTX 6000D is a well-benchmarked product with a strong percentile ranking, while the MI308X remains unquantified in this database.

Architecture Differences

The two accelerators diverge fundamentally in their underlying designs. The AMD Instinct MI308X uses the Aqua Vanjaram chip built on CDNA 3.0 architecture, fabricated by TSMC on a 5 nm process. The die measures 1017 mm² and contains 153,000 million transistors, yielding a transistor density of 150.4 million per square millimeter. The NVIDIA RTX 6000D uses the GB202 chip on Blackwell 2.0 architecture, also fabricated by TSMC on a 5 nm process. Its die is smaller at 750 mm², holding 92,200 million transistors for a density of 122.9 million per square millimeter.

The memory subsystems could not be more different. The MI308X carries 192 GB of HBM3 memory on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RTX 6000D has 84 GB of GDDR7 memory on a 448-bit bus, achieving 1.40 TB/s. The MI308X memory clock is listed as 1300 MHz with 5.2 Gbps effective, while the RTX 6000D memory runs at 1560 MHz with 25 Gbps effective. The MI308X has roughly 3.8 times the raw bandwidth, but the RTX 6000D uses a faster per-pin signaling rate.

Compute resources differ in configuration. The MI308X has 19,456 shading units, 1,216 texture mapping units, and no ROPs, with a pixel rate of 0 MPixel/s and a texture rate of 2,553.6 GTexel/s. The RTX 6000D has 19,968 shading units, 624 TMUs, and 192 ROPs, with a pixel rate of 466.6 GPixel/s and a texture rate of 1,516.3 GTexel/s. The MI308X has nearly double the texture throughput, but the RTX 6000D has all the pixel-processing hardware. The RTX 6000D also includes 156 ray tracing cores and 624 tensor cores, while the MI308X lists no RT or tensor core counts in the database.

Clock speeds show a substantial gap. The MI308X runs at a base of 1000 MHz and a boost of 2100 MHz. The RTX 6000D runs at a base of 1992 MHz and a boost of 2430 MHz. Despite the MI308X's lower clocks, its FP32 throughput is 81.72 TFLOPS, while the RTX 6000D reaches 97.04 TFLOPS. Both parts list FP16 at 1:1 ratio with FP32, meaning the same TFLOPS figures apply. The RTX 6000D achieves its higher throughput through higher clocks and more shading units.

Power and physical design differ sharply. The MI308X is rated at 750 W TDP with an OAM module slot width, no power connectors, and a suggested PSU of 1150 W. The RTX 6000D is rated at 600 W TDP, fits a dual-slot form factor, uses a single 16-pin power connector, and suggests a 1000 W PSU. The MI308X has no display outputs; the RTX 6000D has four DisplayPort 2.1b outputs. Both use PCIe 5.0 x16 interfaces.

API support separates them completely. The MI308X lists DirectX, OpenGL, and Vulkan as N/A. The RTX 6000D supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This reflects the MI308X's compute-only orientation versus the RTX 6000D's workstation graphics capability.

FAQ

Q: Which GPU has more memory capacity?

A: The AMD Instinct MI308X has 192 GB of HBM3 memory, while the NVIDIA RTX 6000D has 84 GB of GDDR7 memory. The MI308X also has a wider 8192-bit bus compared to the RTX 6000D's 448-bit bus.

Q: What are the clock speed differences between the two cards?

A: The MI308X runs at a 1000 MHz base and 2100 MHz boost. The RTX 6000D runs at a 1992 MHz base and 2430 MHz boost. The RTX 6000D has higher clocks in both states.

Q: How does the FP32 compute throughput compare?

A: The MI308X delivers 81.72 TFLOPS FP32, while the RTX 6000D delivers 97.04 TFLOPS FP32. Both list FP16 at 1:1 ratio, meaning the same TFLOPS figures apply to FP16.

Q: Does the MI308X support graphics APIs?

A: The database lists DirectX, OpenGL, and Vulkan as N/A for the MI308X. The RTX 6000D supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What are the power requirements for each card?

A: The MI308X has a 750 W TDP and suggests a 1150 W PSU. The RTX 6000D has a 600 W TDP and suggests a 1000 W PSU. The RTX 6000D uses a single 16-pin power connector, while the MI308X lists no power connectors.

Q: Which card has a higher benchmark percentile ranking?

A: The RTX 6000D ranks in the 98th percentile of all GPUs, with an average benchmark score of 195964. The MI308X has no recorded benchmarks, so its percentile sits at 50 with a zero average score.

Specification Differences

| Specification | AMD Instinct MI308X | NVIDIA RTX 6000D |

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

| Chip | Aqua Vanjaram | GB202 |

| Architecture | CDNA 3.0 | Blackwell 2.0 |

| Generation | Instinct (MIx) | Blackwell PRO W (x000) |

| Transistors | 153,000 million | 92,200 million |

| Die Size | 1017 mm² | 750 mm² |

| Transistor Density | 150.4M / mm² | 122.9M / mm² |

| Base Clock | 1000 MHz | 1992 MHz |

| Boost Clock | 2100 MHz | 2430 MHz |

| Memory Clock | 1300 MHz 5.2 Gbps effective | 1560 MHz 25 Gbps effective |

| Memory Size | 192 GB | 84 GB |

| Memory Type | HBM3 | GDDR7 |

| Memory Bus Width | 8192 bit | 448 bit |

| Memory Bandwidth | 5.32 TB/s | 1.40 TB/s |

| Shading Units | 19456 | 19968 |

| TMUs | 1216 | 624 |

| ROPs | 0 | 192 |

| RT Cores | None listed | 156 |

| Tensor Cores | None listed | 624 |

| Pixel Rate | 0 MPixel/s | 466.6 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 1,516.3 GTexel/s |

| FP32 | 81.72 TFLOPS | 97.04 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 97.04 TFLOPS (1:1) |

| TDP | 750 W | 600 W |

| Slot Width | OAM Module | Dual-slot |

| Power Connectors | None | 1x 16-pin |

| Suggested PSU | 1150 W | 1000 W |

| Display Outputs | No outputs | 4x DisplayPort 2.1b |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not listed | 304 mm x 137 mm x 40 mm |

| Production Status | Not listed | Active |

| Release Date | 2023-12-05 | 2025-07-13 |

| Predecessor | Radeon Instinct | Workstation Ada |

Where Each One Wins

The RTX 6000D wins decisively in areas supported by recorded data. It has actual benchmark scores, placing it in the 98th percentile, while the MI308X has no benchmark entries. The RTX 6000D delivers higher FP32 and FP16 throughput at 97.04 TFLOPS versus 81.72 TFLOPS. It has more shading units (19,968 vs 19,456), higher base and boost clocks, and includes ray tracing and tensor cores. The RTX 6000D also wins on graphics capability: it has 192 ROPs versus zero, a pixel rate of 466.6 GPixel/s versus zero, full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support, plus four DisplayPort outputs. It draws 150 W less power and fits a dual-slot form factor with a standard 16-pin connector.

The MI308X wins on memory capacity and bandwidth. Its 192 GB of HBM3 dwarfs the RTX 6000D's 84 GB of GDDR7. Its 5.32 TB/s bandwidth is roughly 3.8 times the RTX 6000D's 1.40 TB/s. The MI308X has a wider 8192-bit bus, more texture mapping units (1,216 vs 624), and a higher texture rate at 2,553.6 GTexel/s versus 1,516.3 GTexel/s. The MI308X die is also larger at 1017 mm² versus 750 mm², with more transistors.

For compute workloads that scale with memory capacity and bandwidth, such as large model inference or training datasets that exceed 84 GB, the MI308X's specifications suggest an advantage. For any workload requiring graphics output, rasterization, ray tracing, or standard API support, the RTX 6000D is the only option with the necessary hardware. The MI308X has no display outputs and no graphics API support, making it purely a compute accelerator.

The Verdict

The data presents a clear split. The NVIDIA RTX 6000D is the only one of the two with measured performance records. Its 98th percentile ranking and average benchmark score of 195964, which beats the Tesla V100S by 0.8%, the A100 SXM4 by 4.7%, and the RTX 5000 Ada by 6.1%, confirms it as a high-performing accelerator in the database. Its FP32 throughput of 97.04 TFLOPS exceeds the MI308X's 81.72 TFLOPS, and its full graphics stack, including ray tracing cores, tensor cores, ROPs, display outputs, and API support, makes it a general-purpose workstation GPU.

The AMD Instinct MI308X, despite having no benchmark scores, offers specifications aimed at a different workload profile. Its 192 GB memory capacity and 5.32 TB/s bandwidth are unmatched by the RTX 6000D's 84 GB and 1.40 TB/s. For users whose primary constraint is fitting large datasets in GPU memory or moving data across a wide bus, the MI308X's design targets that use case. However, the complete absence of benchmark data means the database cannot verify its actual performance.

The RTX 6000D releases on 2025-07-13, while the MI308X released on 2023-12-05. The RTX 6000D has a launch MSRP of 8,565 USD. The MI308X has no listed MSRP. The RTX 6000D is marked as Active in production status, while the MI308X has no status listed.

A buyer needing a benchmarked, graphics-capable workstation accelerator with proven performance should select the RTX 6000D. A buyer needing maximum memory capacity and bandwidth for compute-only workloads, and willing to accept no display outputs and no graphics API support, would look to the MI308X. The database records no direct comparison, so the choice rests on the specification differences and the RTX 6000D's measured results.