AMD Instinct MI355X vs NVIDIA RTX A1000 Comparison

FAQ

Q: What is the release date of the AMD Instinct MI355X?

A: The AMD Instinct MI355X was released on 2025-06-11.

Q: What is the release date of the NVIDIA RTX A1000?

A: The NVIDIA RTX A1000 was released on 2024-04-15.

Q: Which GPU has a higher average benchmark score?

A: The NVIDIA RTX A1000 has a recorded average benchmark score of 34207, while the AMD Instinct MI355X has no recorded benchmark scores and an average benchmark score of 0.

Q: What is the percentile ranking of each GPU among all GPUs in the database?

A: The NVIDIA RTX A1000 ranks in the 79th percentile, while the AMD Instinct MI355X ranks in the 50th percentile.

Q: What are the nearest rivals to the NVIDIA RTX A1000 in the database?

A: The nearest rivals are the NVIDIA RTX A2000 12 GB (0.2% higher score), AMD Radeon RX 560 XT (0.2% higher), NVIDIA TITAN V (0.4% lower), and AMD Radeon RX 480 (0.6% higher).

Q: What is the memory configuration difference between the two?

A: The AMD Instinct MI355X uses 288 GB of HBM3e with an 8192-bit bus and 8.19 TB/s bandwidth. The NVIDIA RTX A1000 uses 8 GB of GDDR6 with a 128-bit bus and 192.0 GB/s bandwidth.

Architecture Differences

The AMD Instinct MI355X and NVIDIA RTX A1000 represent fundamentally different design philosophies. The MI355X is built on CDNA 4.0 architecture using the MI350 256CU chip, manufactured on a 3 nm process at TSMC. It uses 185,000 million transistors on a 2380 mm² die, giving a transistor density of 77.7M per mm². The RTX A1000 uses the Ampere architecture with the GA107 chip, fabricated on Samsung's 8 nm process. It contains 8,700 million transistors on a 200 mm² die, resulting in a density of 43.5M per mm².

The compute resources differ dramatically. The MI355X has 16,384 shading units and 1,024 texture mapping units, but zero raster operation units. The RTX A1000 has 2,304 shading units, 72 TMUs, 32 ROPs, 18 ray tracing cores, and 72 tensor cores. The MI355X has no ray tracing cores or tensor cores listed, reflecting its compute-oriented CDNA design rather than a graphics-oriented one.

Clock behavior also differs. The MI355X operates at a base clock of 1000 MHz with a boost clock of 2400 MHz. The RTX A1000 runs at 727 MHz base and 1462 MHz boost. Memory clocks are 2000 MHz (8 Gbps effective) for the MI355X and 1500 MHz (12 Gbps effective) for the RTX A1000.

The MI355X is an OAM Module with no display outputs, while the RTX A1000 is a single-slot card with 4x mini-DisplayPort 1.4a outputs. The RTX A1000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4; the MI355X lists N/A for all three APIs.

Head-to-Head Benchmarks

Direct head-to-head benchmark data between the AMD Instinct MI355X and NVIDIA RTX A1000 is not available in the database. The MI355X has no recorded benchmark entries, while the RTX A1000 has three recorded tests.

The RTX A1000 scores 969 in 3DMark Steel Nomad DX12. In Geekbench OpenCL, it scores 52,078, and in Geekbench Vulkan, it scores 49,574. These results place the RTX A1000 in the 79th percentile of all GPUs, with an average benchmark score of 34,207.

The MI355X holds a 50th percentile position with an average benchmark score of 0, indicating no measured performance data has been logged. Without benchmark results for the MI355X, a numerical comparison of application performance cannot be established from the recorded data.

The RTX A1000's nearest rivals provide context for its standing. The RTX A2000 12 GB scores 34,154, which is 0.2% higher. The AMD Radeon RX 560 XT scores 34,133, also 0.2% higher. The NVIDIA TITAN V scores 34,355, which is 0.4% lower than the RTX A1000. The AMD Radeon RX 480 scores 33,997, 0.6% higher. These deltas place the RTX A1000 in a tight competitive cluster where the difference between the lowest and highest rival is less than 1.1%.

Specification Differences

The two GPUs differ across nearly every recorded specification. The process node is 3 nm for the AMD Instinct MI355X versus 8 nm for the NVIDIA RTX A1000. The MI355X uses TSMC as its foundry; the RTX A1000 uses Samsung. Transistor count is 185,000 million versus 8,700 million. Die size is 2380 mm² versus 200 mm².

Memory specifications are vastly different. The MI355X has 288 GB of HBM3e with an 8192-bit bus and 8.19 TB/s bandwidth. The RTX A1000 has 8 GB of GDDR6 with a 128-bit bus and 192.0 GB/s bandwidth.

Compute units scale accordingly. The MI355X has 16,384 shading units, 1,024 TMUs, and 0 ROPs. The RTX A1000 has 2,304 shading units, 72 TMUs, 32 ROPs, 18 RT cores, and 72 tensor cores. Pixel rate is 0 MPixel/s for the MI355X and 46.78 GPixel/s for the RTX A1000. Texture rate is 2,457.6 GTexel/s for the MI355X and 105.3 GTexel/s for the RTX A1000.

FP32 compute is 78.64 TFLOPS for the MI355X versus 6.737 TFLOPS for the RTX A1000. Both list FP16 at a 1:1 ratio with FP32. Power consumption is 1400 W for the MI355X and 50 W for the RTX A1000. The suggested PSU is 1800 W for the MI355X and 250 W for the RTX A1000.

The MI355X uses an OAM Module slot width with no power connectors. The RTX A1000 is single-slot with no power connectors. Bus interface is PCIe 5.0 x16 for the MI355X and PCIe 4.0 x8 for the RTX A1000. The MI355X has no display outputs; the RTX A1000 has four mini-DisplayPort 1.4a outputs.

Dimensions differ as well. The MI355X measures 102 mm in length and 165 mm in width. The RTX A1000 measures 163 mm in length and 69 mm in height. The MI355X has no height listed, and the RTX A1000 has no width listed.

The RTX A1000 has an active production status, while the MI355X has no production status recorded. The RTX A1000's predecessor is Quadro Turing and its successor is Workstation Ada. The MI355X's predecessor is Radeon Instinct with no successor listed.

Where Each One Wins

The AMD Instinct MI355X wins decisively on raw compute specifications. Its FP32 throughput of 78.64 TFLOPS is more than 11 times the RTX A1000's 6.737 TFLOPS. Texture rate is 2,457.6 GTexel/s versus 105.3 GTexel/s, a 23x advantage. Memory bandwidth is 8.19 TB/s against 192.0 GB/s, more than a 42x difference. The MI355X also holds a 288 GB memory capacity, compared to 8 GB on the RTX A1000.

The MI355X targets data center and compute workloads, as indicated by its OAM Module form factor, lack of display outputs, and absence of graphics APIs. Its CDNA 4.0 architecture and 8192-bit memory bus are suited for large-scale matrix operations and high-bandwidth data movement. The 3 nm process and 185,000 million transistors provide substantial compute density.

The NVIDIA RTX A1000 wins on measured performance data and practical deployment characteristics. It has three recorded benchmark scores with an average of 34,207 and a 79th percentile ranking. The MI355X has no benchmark scores and sits at the 50th percentile. The RTX A1000 is the only one of the two with verified application performance in the database.

The RTX A1000 also wins on power efficiency. It consumes 50 W versus 1400 W for the MI355X, a 28x difference. The suggested PSU is 250 W versus 1800 W. This makes the RTX A1000 deployable in environments where the MI355X's power requirements would be prohibitive.

The RTX A1000 provides graphics functionality that the MI355X lacks. It has 32 ROPs, 18 ray tracing cores, 72 tensor cores, and four mini-DisplayPort outputs. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The MI355X lists no ROPs, no RT cores, no tensor cores, and no API support.

The RTX A1000's single-slot form factor and PCIe 4.0 x8 interface contrast with the MI355X's OAM Module and PCIe 5.0 x16 interface. The RTX A1000 measures 163 mm by 69 mm, while the MI355X measures 102 mm by 165 mm.

For compute-heavy workloads requiring maximum throughput and memory capacity, the MI355X's specifications are superior. For tested performance, graphics capability, and low-power operation, the RTX A1000 is the only option with recorded data. The database contains no benchmark results for the MI355X, so its real-world performance remains unverified.