AMD Instinct MI308X vs NVIDIA RTX A1000 Comparison

# Where Each One Wins

The recorded data presents an unusual comparison: the AMD Instinct MI308X has no benchmark entries in the database, while the NVIDIA RTX A1000 has three recorded tests. This means the direct head-to-head benchmark table is empty, and the MI308X cannot be credited with any wins. The RTX A1000 holds all recorded wins by default, but the comparison is far more nuanced than a simple win count.

The RTX A1000 delivers a 3DMark Steel Nomad DX12 score of 969, a Geekbench OpenCL score of 52,078, and a Geekbench Vulkan score of 49,574. These are the only quantitative performance data points available. The MI308X, by contrast, has no benchmark scores recorded, so its performance must be inferred from its architectural specifications rather than measured results.

The use-case split is therefore clear from the data: the RTX A1000 is a measurable, tested workstation GPU with concrete scores in the database. The MI308X is an accelerator with no recorded test results, which positions it as a compute-oriented product whose performance is not captured by the consumer-grade benchmark suite used here. The RTX A1000 wins every recorded benchmark, but the MI308X is built for a different workload class entirely, one not represented in the available tests.

# Architecture Differences

The two cards come from different manufacturers, nodes, and design philosophies. AMD builds the MI308X on a 5 nm TSMC process, while NVIDIA uses an 8 nm Samsung node for the RTX A1000. The transistor counts differ massively: the MI308X packs 153,000 million transistors on a 1017 mm² die, yielding a density of 150.4 million transistors per square millimeter. The RTX A1000 has 8,700 million transistors on a 200 mm² die, with a density of 43.5 million per square millimeter. The MI308X is over 17 times larger in transistor count and over 5 times larger in die area.

The MI308X uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the RTX A1000 uses the Ampere architecture with the GA107 chip. The MI308X belongs to the Instinct (MIx) generation, and the RTX A1000 belongs to the Workstation Ampere (Ax000) generation. The MI308X has no display outputs, no RT cores, no tensor cores listed, and no API support for DirectX, OpenGL, or Vulkan. The RTX A1000 has 18 RT cores, 72 tensor cores, supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and provides 4x mini-DisplayPort 1.4a outputs.

Memory architecture diverges completely. The MI308X uses 192 GB of HBM3 on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RTX A1000 has 8 GB of GDDR6 on a 128-bit bus, with 192.0 GB/s bandwidth. The MI308X's memory bandwidth is roughly 27.7 times higher, and its capacity is 24 times larger. The MI308X has 19,456 shading units and 1,216 TMUs, while the RTX A1000 has 2,304 shading units and 72 TMUs. The MI308X has 0 ROPs and a pixel rate of 0 MPixel/s, whereas the RTX A1000 has 32 ROPs and a pixel rate of 46.78 GPixel/s.

Clock speeds and power draw also differ sharply. The MI308X runs at a 1000 MHz base and 2100 MHz boost, with memory at 1300 MHz (5.2 Gbps effective). The RTX A1000 runs at 727 MHz base and 1462 MHz boost, with memory at 1500 MHz (12 Gbps effective). The MI308X has a TDP of 750 W and a suggested PSU of 1150 W, while the RTX A1000 has a TDP of 50 W and a suggested PSU of 250 W. The MI308X is an OAM module with no power connectors, and the RTX A1000 is a single-slot card with no power connectors.

# Head-to-Head Benchmarks

The head-to-head benchmark table is empty, meaning no direct comparative tests were recorded. However, the RTX A1000's individual benchmark scores provide the only measurable data. Its 3DMark Steel Nomad DX12 score of 969 and its Geekbench scores of 52,078 (OpenCL) and 49,574 (Vulkan) establish a performance baseline. The MI308X has no recorded scores, so no direct numerical comparison is possible.

The nearest rivals for the RTX A1000 provide context. The NVIDIA RTX A2000 12 GB scores 34,154, which is 0.2% higher than the RTX A1000's average of 34,207. The AMD Radeon RX 560 XT scores 34,133, also 0.2% higher. The NVIDIA TITAN V scores 34,355, which is 0.4% higher, and the AMD Radeon RX 480 scores 33,997, which is 0.6% lower. These deltas are small, indicating that the RTX A1000 sits in a tightly clustered performance band among its peers.

The MI308X has no rivals listed and no average benchmark score, which is consistent with its role as a compute accelerator rather than a graphics card. The RTX A1000's 79th percentile versus all GPUs places it above most consumer cards, while the MI308X sits at the 50th percentile with an average benchmark score of 0, reflecting its absence from the test suite.

# The Verdict

The data indicates two fundamentally different products. The RTX A1000 is a tested, active workstation GPU with measurable performance, display outputs, and a compact single-slot form factor. Its 79th percentile ranking and average score of 34,207 place it among capable workstation cards, with its nearest rivals all within 0.6% of its score.

The MI308X is an OAM module with no display outputs, no graphics APIs, and no recorded benchmarks. It is built for compute density, with 192 GB of HBM3, a 5.32 TB/s memory bandwidth, and 81.72 TFLOPS of FP32 and FP16 throughput. Its 750 W TDP and 1150 W suggested PSU indicate a server-class accelerator, not a desktop graphics card.

The verdict from the recorded data: the RTX A1000 is the appropriate choice for workstation graphics, rendering, and any workload that requires DirectX, OpenGL, or Vulkan support. The MI308X is the appropriate choice for massive parallel compute workloads that need enormous memory capacity and bandwidth, provided the software stack can leverage CDNA 3.0 without graphics API support.

# FAQ

Q: Which card has more shading units?

A: The AMD Instinct MI308X has 19,456 shading units, while the NVIDIA RTX A1000 has 2,304 shading units.

Q: What is the memory bandwidth difference?

A: The MI308X delivers 5.32 TB/s from 192 GB of HBM3 on an 8192-bit bus. The RTX A1000 delivers 192.0 GB/s from 8 GB of GDDR6 on a 128-bit bus.

Q: Does the MI308X support graphics APIs?

A: No. The MI308X lists DirectX as N/A, OpenGL as N/A, and Vulkan as N/A. The RTX A1000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What are the RTX A1000's benchmark scores?

A: The RTX A1000 scores 969 in 3DMark Steel Nomad DX12, 52,078 in Geekbench OpenCL, and 49,574 in Geekbench Vulkan. Its average benchmark score is 34,207.

Q: Which card has a higher boost clock?

A: The MI308X has a boost clock of 2100 MHz, while the RTX A1000 has a boost clock of 1462 MHz.

Q: What is the power requirement for each card?

A: The MI308X has a TDP of 750 W and a suggested PSU of 1150 W. The RTX A1000 has a TDP of 50 W and a suggested PSU of 250 W.

# Specification Differences

The following fields differ between the two cards:

| Specification | AMD Instinct MI308X | NVIDIA RTX A1000 |

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

| Manufacturer | AMD | NVIDIA |

| Chip | Aqua Vanjaram | GA107 |

| Architecture | CDNA 3.0 | Ampere |

| Generation | Instinct (MIx) | Workstation Ampere (Ax000) |

| Process Node | 5 nm | 8 nm |

| Foundry | TSMC | Samsung |

| Transistors | 153,000 million | 8,700 million |

| Die Size | 1017 mm² | 200 mm² |

| Transistor Density | 150.4M / mm² | 43.5M / mm² |

| Base Clock | 1000 MHz | 727 MHz |

| Boost Clock | 2100 MHz | 1462 MHz |

| Memory Clock | 1300 MHz 5.2 Gbps effective | 1500 MHz 12 Gbps effective |

| Memory Size | 192 GB | 8 GB |

| Memory Type | HBM3 | GDDR6 |

| Memory Bus Width | 8192 bit | 128 bit |

| Memory Bandwidth | 5.32 TB/s | 192.0 GB/s |

| Shading Units | 19456 | 2304 |

| TMUs | 1216 | 72 |

| ROPs | 0 | 32 |

| RT Cores | None | 18 |

| Tensor Cores | None | 72 |

| Pixel Rate | 0 MPixel/s | 46.78 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 105.3 GTexel/s |

| FP32 | 81.72 TFLOPS | 6.737 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 6.737 TFLOPS (1:1) |

| TDP | 750 W | 50 W |

| Slot Width | OAM Module | Single-slot |

| Suggested PSU | 1150 W | 250 W |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x8 |

| Display Outputs | No outputs | 4x mini-DisplayPort 1.4a |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not recorded | 163 mm 6.4 inches length, 69 mm 2.7 inches height |

| Production Status | Not recorded | Active |

| Release Date | 2023-12-05 | 2024-04-15 |

| Predecessor | Radeon Instinct | Quadro Turing |

| Successor | None recorded | Workstation Ada |

| Percentile vs All GPUs | 50 | 79 |

| Average Benchmark Score | 0 | 34207 |