AMD Instinct MI455X vs Intel Arc A580 Comparison

AMD Instinct MI455X vs Intel Arc A580

The database contains two very different accelerators: the AMD Instinct MI455X and the Intel Arc A580. The MI455X is a massive compute-oriented module with no display outputs, while the A580 is a conventional graphics card with full display connectivity and API support. Direct head-to-head benchmark results are not recorded, so the comparison relies on the recorded specifications, the A580’s benchmark scores, and the percentile data. The MI455X has an average benchmark score of zero and no nearest rivals, while the A580 has three recorded benchmark results, an average score of 57,756, and a percentile ranking of 87 among all GPUs. The MI455X sits at the 50th percentile with no recorded scores, which indicates that the database does not yet contain performance data for it. The following analysis interprets the available facts.

Head-to-Head Benchmarks

No direct head-to-head benchmark entries exist in the database for these two products. The MI455X has an empty benchmark array, an average score of zero, and no nearest rivals. The Intel Arc A580, by contrast, has three recorded test results: 3DMark Steel Nomad DX12 with a score of 2,229, Geekbench OpenCL with a score of 91,657, and Geekbench Vulkan with a score of 79,381. The A580’s average benchmark score is 57,756, and its percentile versus all GPUs is 87. The MI455X’s percentile is 50, but with no measured scores, that percentile cannot be interpreted as a performance level. The data shows that the A580 is the only product in this comparison with actual measured performance results. The MI455X’s zero average score and empty benchmark list mean no direct numerical comparison can be made from recorded measurements.

The A580’s nearest rivals in the database provide context for its measured performance. The AMD Radeon RX 5600 OEM has an average score of 58,085, which places it 0.6 percent below the A580. The AMD Radeon RX 9070 GRE scores 57,367, which is 0.7 percent above the A580. The Intel Arc A570M scores 58,239, which is 0.8 percent below the A580. The AMD Radeon RX 6950 XT scores 58,392, which is 1.1 percent below the A580. These four rivals surround the A580 within roughly a one percent band, indicating that the A580’s average score is closely matched by a group of AMD products and an Intel mobile part. The A580’s 87th percentile ranking places it well above the midpoint of all GPUs in the database, while the MI455X’s 50th percentile with no scores carries no comparable meaning.

The specifications reveal why the two products occupy different performance spaces. The MI455X uses 32,768 shading units, 1,024 texture mapping units, and zero ROPs, with a texture rate of 2,457.6 GTexel/s and an FP32 throughput of 157.3 TFLOPS. The A580 uses 3,072 shading units, 192 TMUs, and 96 ROPs, with a texture rate of 384.0 GTexel/s and an FP32 throughput of 12.29 TFLOPS. The MI455X’s FP32 figure is roughly 12.8 times the A580’s, and its texture rate is roughly 6.4 times higher. The MI455X also has a much larger memory subsystem: 432 GB of HBM4 on a 24,576-bit bus with 23.3 TB/s of bandwidth, versus the A580’s 8 GB of GDDR6 on a 256-bit bus with 512.0 GB/s. The MI455X’s memory bandwidth is about 45.5 times the A580’s. These are the largest numerical gaps in the comparison.

The A580 has capabilities the MI455X does not. The A580 has 24 ray tracing cores, a pixel rate of 192.0 GPixel/s, and support for DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI455X lists no ray tracing cores, a pixel rate of 0 MPixel/s, and no API support values for DirectX, OpenGL, or Vulkan. The A580 also has display outputs: 1x HDMI 2.1 and 3x DisplayPort 2.0. The MI455X has no display outputs. The MI455X’s FP16 throughput matches its FP32 at 157.3 TFLOPS (1:1), while the A580’s FP16 is 24.58 TFLOPS (2:1), meaning the A580 processes FP16 at twice its FP32 rate. The MI455X’s FP16 figure is still about 6.4 times the A580’s FP16 figure.

Clock speeds differ in direction and magnitude. The MI455X has a base clock of 1,000 MHz and a boost clock of 2,400 MHz, while the A580 has a base clock of 1,700 MHz and a boost clock of 2,000 MHz. The A580 starts at a higher base clock but boosts to a lower maximum. Memory clocks also differ: the MI455X runs at 1,900 MHz with 7.6 Gbps effective, while the A580 runs at 2,000 MHz with 16 Gbps effective. The A580’s memory clock is higher, but its bus width is far smaller, which explains the bandwidth gap. The MI455X’s power envelope is 2,300 W with a suggested PSU of 2,700 W, while the A580 is rated at 175 W with a suggested PSU of 450 W. The MI455X uses an EAM Module slot width with no power connectors, and the A580 is a dual-slot card with two 8-pin connectors. The MI455X uses PCIe 6.0 x16, and the A580 uses PCIe 4.0 x16.

The Verdict

The data indicates that these products serve different purposes. The Intel Arc A580 is the only one with recorded benchmark scores, an 87th percentile ranking, and a set of nearest rivals within about one percent. It is a conventional graphics card with display outputs, ray tracing cores, and full DirectX, OpenGL, and Vulkan support. The AMD Instinct MI455X has no recorded benchmark scores, no nearest rivals, and an empty average score. Its specifications point toward compute workloads: 432 GB of HBM4 memory, 23.3 TB/s of bandwidth, 157.3 TFLOPS of FP32, and a 2,300 W power envelope. The MI455X is not a graphics card in the traditional sense; it has no display outputs and no API support values.

From the recorded data, the A580 is the product for anyone needing a graphics card with measured performance, driver-level API support, and display connectivity. Its three benchmark scores place it at the 87th percentile, and its nearest rivals are all within 1.1 percent of its average score. The MI455X cannot be compared on measured performance because the database contains no scores for it. Its specifications suggest a compute accelerator designed for large-scale memory and throughput, but without benchmark results, its actual performance relative to the A580 remains unmeasured. The 50th percentile figure for the MI455X is not a performance claim; it appears alongside a zero average score and an empty benchmark list.

The power requirements reinforce the separation. The MI455X demands a 2,700 W suggested PSU, while the A580 asks for 450 W. The MI455X’s 2,300 W TDP is more than 13 times the A580’s 175 W. The MI455X’s die size is 2,990 mm² with 320,000 million transistors, while the A580’s die is 406 mm² with 21,700 million transistors. The MI455X uses a 2 nm process with a transistor density of 107.0M per mm², and the A580 uses a 6 nm process with 53.4M per mm². The MI455X is built on CDNA 5.0 architecture, and the A580 uses Xe-HPG architecture. The MI455X is in the Instinct (MIx) generation, and the A580 is in the Alchemist (Arc 5) generation. The MI455X’s release date is recorded as 2026-07-22, and the A580’s is 2023-10-09.

FAQ

Q: Which product has recorded benchmark scores?

A: The Intel Arc A580 has three recorded scores: 2,229 in 3DMark Steel Nomad DX12, 91,657 in Geekbench OpenCL, and 79,381 in Geekbench Vulkan. The AMD Instinct MI455X has no recorded benchmark scores.

Q: What is the average benchmark score for each product?

A: The Intel Arc A580 has an average benchmark score of 57,756. The AMD Instinct MI455X has an average benchmark score of 0.

Q: How does the Intel Arc A580 compare to its nearest rivals?

A: The A580’s nearest rivals are the AMD Radeon RX 5600 OEM at 58,085 (0.6 percent below the A580), the AMD Radeon RX 9070 GRE at 57,367 (0.7 percent above), the Intel Arc A570M at 58,239 (0.8 percent below), and the AMD Radeon RX 6950 XT at 58,392 (1.1 percent below).

Q: What are the memory capacities of the two products?

A: The AMD Instinct MI455X has 432 GB of HBM4 memory on a 24,576-bit bus with 23.3 TB/s of bandwidth. The Intel Arc A580 has 8 GB of GDDR6 memory on a 256-bit bus with 512.0 GB/s of bandwidth.

Q: Does the AMD Instinct MI455X support display outputs?

A: No. The MI455X has no display outputs. The Intel Arc A580 has 1x HDMI 2.1 and 3x DisplayPort 2.0 outputs.

Q: What is the FP32 throughput for each product?

A: The AMD Instinct MI455X has an FP32 throughput of 157.3 TFLOPS. The Intel Arc A580 has an FP32 throughput of 12.29 TFLOPS.

Specification Differences

The two products differ in nearly every recorded specification. The MI455X uses a 2 nm process at TSMC, while the A580 uses a 6 nm process at TSMC. Transistor counts are 320,000 million for the MI455X and 21,700 million for the A580. Die sizes are 2,990 mm² and 406 mm², respectively. Transistor density is 107.0M per mm² for the MI455X and 53.4M per mm² for the A580. The MI455X has a base clock of 1,000 MHz and a boost clock of 2,400 MHz, while the A580 has a base clock of 1,700 MHz and a boost clock of 2,000 MHz. Memory clocks are 1,900 MHz (7.6 Gbps effective) for the MI455X and 2,000 MHz (16 Gbps effective) for the A580. Memory size is 432 GB versus 8 GB. Memory type is HBM4 versus GDDR6. Memory bus width is 24,576 bit versus 256 bit. Memory bandwidth is 23.3 TB/s versus 512.0 GB/s.

Shading units are 32,768 versus 3,072. TMUs are 1,024 versus 192. ROPs are 0 versus 96. The MI455X has no ray tracing cores listed, while the A580 has 24. Pixel rate is 0 MPixel/s versus 192.0 GPixel/s. Texture rate is 2,457.6 GTexel/s versus 384.0 GTexel/s. FP32 is 157.3 TFLOPS versus 12.29 TFLOPS. FP16 is 157.3 TFLOPS (1:1) versus 24.58 TFLOPS (2:1). TDP is 2,300 W versus 175 W. Slot width is EAM Module versus dual-slot. Power connectors are none versus 2x 8-pin. Suggested PSU is 2,700 W versus 450 W. Bus interface is PCIe 6.0 x16 versus PCIe 4.0 x16. Display outputs are none versus 1x HDMI 2.1 and 3x DisplayPort 2.0. DirectX support is N/A versus 12 Ultimate (12_2). OpenGL support is N/A versus 4.6. Vulkan support is N/A versus 1.4. The MI455X has no recorded dimensions, and the A580 also has no recorded dimensions.

Architecture Differences

The MI455X is built on CDNA 5.0 architecture and uses the MI450 256CU chip. The A580 uses Xe-HPG architecture and the DG2-512 chip. The MI455X belongs to the Instinct (MIx) generation, and the A580 belongs to the Alchemist (Arc 5) generation. The MI455X’s predecessor is listed as Radeon Instinct, with no successor recorded. The A580’s predecessor is Xe Graphics, and its successor is Battlemage. The MI455X has no production status recorded, while the A580 is marked as Active. The MI455X has 32,768 shading units, which the architecture organizes into the 256 compute units implied by the chip name. The A580 has 3,072 shading units and 24 ray tracing cores. The MI455X lists no ray tracing cores and no tensor cores. The A580 also lists no tensor cores.

The MI455X uses HBM4 memory, which is a high-bandwidth stacked memory type, and the A580 uses GDDR6. The MI455X’s FP16 rate is 1:1 with its FP32, meaning it does not double FP16 throughput. The A580’s FP16 rate is 2:1, meaning it doubles FP16 throughput relative to FP32. The MI455X has no API support values for DirectX, OpenGL, or Vulkan, consistent with a compute accelerator that does not render graphics. The A580 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI455X has no display outputs, and the A580 has HDMI and DisplayPort outputs. The MI455X uses PCIe 6.0 x16, and the A580 uses PCIe 4.0 x16. The MI455X is an EAM Module, and the A580 is a dual-slot card with two 8-pin power connectors.

Where Each One Wins

The Intel Arc A580 wins in all measured performance categories because it is the only product with recorded benchmark scores. Its 3DMark Steel Nomad DX12 score of 2,229, Geekbench OpenCL score of 91,657, and Geekbench Vulkan score of 79,381 provide the only direct performance evidence in the database. Its 87th percentile ranking and average score of 57,756 place it among a tight cluster of rivals, with the closest competitor only 0.7 percent faster and the furthest only 1.1 percent slower. The A580 also wins on graphics features: it has 24 ray tracing cores, a pixel rate of 192.0 GPixel/s, and full support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. It has display outputs, which makes it usable as a conventional graphics card.

The AMD Instinct MI455X wins on raw compute specifications. Its FP32 throughput of 157.3 TFLOPS is 12.8 times the A580’s 12.29 TFLOPS. Its texture rate of 2,457.6 GTexel/s is 6.4 times the A580’s 384.0 GTexel/s. Its memory bandwidth of 23.3 TB/s is 45.5 times the A580’s 512.0 GB/s, and its memory capacity of 432 GB is 54 times the A580’s 8 GB. The MI455X has 32,768 shading units, more than 10 times the A580’s 3,072. It uses a 2 nm process with 320,000 million transistors, while the A580 uses a 6 nm process with 21,700 million transistors. The MI455X’s FP16 throughput of 157.3 TFLOPS is 6.4 times the A580’s 24.58 TFLOPS, even though the A580’s FP16 rate is 2:1 and the MI455X’s is 1:1.

The use cases split cleanly along these lines. The A580 is positioned for graphics rendering, ray tracing, and general GPU workloads with display output and API support. Its nearest rivals are all within 1.1 percent, which suggests it competes in a dense performance band. The MI455X is positioned for compute-heavy tasks that require large memory capacity and extremely high memory bandwidth, with no display output and no graphics API support. The MI455X’s 2,300 W TDP and 2,700 W suggested PSU indicate a data-center or server-class installation, while the A580’s 175 W TDP and 450 W suggested PSU fit a desktop environment. The A580’s measured scores and 87th percentile ranking are the only performance data available, so any claim about the MI455X’s real-world performance would go beyond the recorded facts.