AMD Instinct MI355X vs Intel Arc B580 Comparison

FAQ

Q: What is the AMD Instinct MI355X designed for, based on its specifications?

A: The AMD Instinct MI355X is an accelerator module built on CDNA 4.0 architecture with 16,384 shading units, 288 GB of HBM3e memory on an 8192-bit bus, and a 1400 W TDP. It has no display outputs and no DirectX, OpenGL, or Vulkan API support, indicating it is intended for compute workloads rather than graphics rendering.

Q: What is the Intel Arc B580 designed for, based on its specifications?

A: The Intel Arc B580 is a dual-slot consumer graphics card built on Xe2-HPG architecture with 2,560 shading units, 12 GB of GDDR6 memory on a 192-bit bus, and a 190 W TDP. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and includes 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs.

Q: How do the two products compare in raw FP32 compute performance?

A: The AMD Instinct MI355X delivers 78.64 TFLOPS of FP32 compute, while the Intel Arc B580 delivers 13.67 TFLOPS. The AMD part also matches its FP16 throughput at 78.64 TFLOPS (1:1), whereas the Intel card achieves 27.34 TFLOPS FP16 (2:1).

Q: What are the memory bandwidth differences between the two?

A: The AMD Instinct MI355X has 8.19 TB/s of bandwidth from 288 GB of HBM3e across an 8192-bit interface. The Intel Arc B580 has 456.0 GB/s of bandwidth from 12 GB of GDDR6 across a 192-bit interface. The AMD accelerator provides roughly 18 times the memory bandwidth per the recorded figures.

Q: What is the process node and die size for each product?

A: The AMD Instinct MI355X uses a 3 nm process at TSMC with a die size of 2380 mm² and 185,000 million transistors. The Intel Arc B580 uses a 5 nm process at TSMC with a die size of 272 mm² and 19,600 million transistors.

Q: What is the benchmark percentile ranking for each product?

A: The Intel Arc B580 has a percentile vs all GPUs of 68 and an average benchmark score of 23,021. The AMD Instinct MI355X has a percentile vs all GPUs of 50 and an average benchmark score of 0, as it has no recorded benchmarks in the database.

The Verdict

The recorded data positions the Intel Arc B580 as the only one of the two with measurable graphics benchmarks. Its average benchmark score of 23,021 places it in the 68th percentile of all GPUs. Its nearest rivals include the AMD Radeon RX 580 2048SP with an average score of 23,061 (0.2% higher), the NVIDIA GeForce RTX 3080 with 23,172 (0.7% higher), the NVIDIA GeForce RTX 2080 with 22,895 (0.6% lower), and the NVIDIA P106-100 with 23,249 (1% higher). The Arc B580 sits effectively at parity with these cards, within a 1% delta band.

The AMD Instinct MI355X shows no benchmark entries, a percentile of 50, and an average score of 0. This means the database has no recorded performance data for this accelerator. Its specifications, however, describe a large compute module: 16,384 shading units, 288 GB of HBM3e, 8.19 TB/s bandwidth, and 78.64 TFLOPS FP32. These figures are orders of magnitude above the Intel part on paper, but without benchmark results, no direct performance comparison can be made.

Which product should be chosen depends entirely on workload. The Intel Arc B580 is the only option with display outputs, graphics API support, and benchmark scores. It is suited for standard graphics tasks. The AMD Instinct MI355X is a compute accelerator with no display outputs and no graphics API support, so it cannot serve as a consumer graphics card. Its intended role is high-throughput compute, where its memory capacity and bandwidth are the standout features. The data does not support a direct head-to-head performance ranking because one product has measurable results and the other does not.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for the AMD Instinct MI355X versus the Intel Arc B580. The Intel Arc B580 has ten individual benchmark scores recorded. The AMD Instinct MI355X has none.

For the Intel Arc B580, the recorded scores are as follows: 3DMark Steel Nomad DX12 at 3,068, Geekbench OpenCL at 92,821, Geekbench Vulkan at 109,672, Passmark DirectX 10 at 76, Passmark DirectX 11 at 128, Passmark DirectX 12 at 76, Passmark DirectX 9 at 183, Passmark G2D at 709, Passmark G3D at 15,748, and Passmark GPU Compute at 7,729.

The AMD Instinct MI355X has no scores in any of these tests. Therefore, no wins can be attributed to either side from direct testing. The only quantitative comparison available is from the specification sheet. The Instinct MI355X lists 78.64 TFLOPS FP32 versus 13.67 TFLOPS for the Arc B580, a 5.75 times higher figure. Its memory bandwidth of 8.19 TB/s versus 456.0 GB/s is approximately 18 times higher. Its shading unit count of 16,384 versus 2,560 is 6.4 times higher. These are theoretical maximums, not measured results.

The Intel Arc B580 has a percentile of 68, meaning it sits above the median GPU in the database. The AMD Instinct MI355X is at percentile 50 with a zero average score, which reflects the absence of benchmark data, not a measured performance level. The nearest rival data for the Arc B580 shows it within 1% of the Radeon RX 580 2048SP, GeForce RTX 2080, GeForce RTX 3080, and P106-100, which gives context for its measured performance tier. No such context exists for the Instinct MI355X.

Specification Differences

The AMD Instinct MI355X and Intel Arc B580 differ across nearly every recorded specification. The AMD part uses a 3 nm process, while the Intel part uses a 5 nm process, both at TSMC. Transistor count is 185,000 million versus 19,600 million. Die size is 2380 mm² versus 272 mm². Transistor density is 77.7M per mm² versus 72.1M per mm².

Base clock is 1000 MHz for the AMD part versus 2670 MHz for the Intel part. Boost clock is 2400 MHz versus 2670 MHz. Memory clock is 2000 MHz (8 Gbps effective) versus 2375 MHz (19 Gbps effective). Memory size is 288 GB HBM3e versus 12 GB GDDR6. Bus width is 8192 bit versus 192 bit. Bandwidth is 8.19 TB/s versus 456.0 GB/s.

Shading units are 16,384 versus 2,560. Texture mapping units are 1,024 versus 160. Render output units are 0 versus 80. Ray tracing cores are not listed for the AMD part, while the Intel part has 20. Pixel rate is 0 MPixel/s versus 213.6 GPixel/s. Texture rate is 2,457.6 GTexel/s versus 427.2 GTexel/s. FP32 is 78.64 TFLOPS versus 13.67 TFLOPS. FP16 is 78.64 TFLOPS (1:1) versus 27.34 TFLOPS (2:1).

TDP is 1400 W versus 190 W. The AMD part is an OAM Module with no power connectors, while the Intel part is dual-slot with a 1x 8-pin connector. Suggested PSU is 1800 W versus 450 W. Bus interface is PCIe 5.0 x16 versus PCIe 4.0 x8. Display outputs are none for the AMD part versus 1x HDMI 2.1a and 3x DisplayPort 2.1 for the Intel part.

Dimensions also differ. The AMD module is 102 mm long and 165 mm wide. The Intel card is 272 mm long, 115 mm high, and 45 mm wide. Release dates are June 11, 2025 for the AMD part and December 12, 2024 for the Intel part. The Intel Arc B580 has a launch MSRP of 249 USD, while the AMD part has no recorded launch MSRP. Production status is listed as Active for the Intel part and null for the AMD part.

Architecture Differences

The AMD Instinct MI355X uses CDNA 4.0 architecture with the MI350 256CU chip, belonging to the Instinct (MIx) generation. The Intel Arc B580 uses Xe2-HPG architecture with the BMG-G21 chip, belonging to the Battlemage (Arc 5) generation. The AMD architecture is compute-oriented, with no graphics API support listed: DirectX, OpenGL, and Vulkan are all marked N/A. The Intel architecture is graphics-oriented, supporting DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The AMD part has 16,384 shading units and 1,024 TMUs but zero ROPs and no listed ray tracing cores. This configuration, combined with no display outputs, confirms a pure compute design. The Intel part has 2,560 shading units, 160 TMUs, 80 ROPs, and 20 ray tracing cores, which is a conventional graphics pipeline arrangement.

Cache and core layout details beyond shading units and TMUs are not recorded for either product in the database. The AMD part has no tensor core count listed, and the Intel part also has no tensor core count listed. The AMD accelerator uses HBM3e memory with an 8192-bit bus, while the Intel card uses GDDR6 with a 192-bit bus. Memory clock rates differ, with the AMD part at 2000 MHz (8 Gbps effective) and the Intel part at 2375 MHz (19 Gbps effective).

The predecessor fields also differ. The AMD part lists Radeon Instinct as its predecessor, while the Intel part lists Alchemist. The process node difference, 3 nm versus 5 nm, combined with transistor density of 77.7M per mm² versus 72.1M per mm², indicates that the AMD chip packs far more transistors into a much larger die. The AMD die is 2380 mm², which is 8.75 times the size of the Intel die at 272 mm². The transistor count difference is even larger: 185,000 million versus 19,600 million, a ratio of roughly 9.4 to 1.

The power delivery approach is fundamentally different. The AMD module draws up to 1400 W and uses no power connectors, relying on the OAM baseboard for power delivery. The Intel card draws 190 W and uses a single 8-pin connector. The suggested PSU figures, 1800 W versus 450 W, reflect the scale of the power requirements. The bus interface differs as well: PCIe 5.0 x16 for the AMD part and PCIe 4.0 x8 for the Intel part. Both are TSMC products, but the AMD part is on the smaller node. The AMD part has no production status recorded, while the Intel part is marked Active.