AMD Instinct MI455X vs Intel Arc A380E Comparison

Head-to-Head Benchmarks

The recorded data for the AMD Instinct MI455X and the Intel Arc A380E contains no overlapping benchmark scores. The AMD Instinct MI455X has an average benchmark score of 0, while the Intel Arc A380E also records an average benchmark score of 0. Both parts sit at the 50th percentile among all GPUs in the database, a percentile that reflects the absence of measured performance entries rather than any head-to-head comparison. Without shared benchmark results, the largest wins for each side are derived entirely from their respective architectural and specification sheets.

The AMD Instinct MI455X delivers 157.3 TFLOPS of FP32 compute, which is 38.4 times the 4.096 TFLOPS of the Intel Arc A380E. The FP16 comparison is equally lopsided: the MI455X sustains 157.3 TFLOPS with a 1:1 FP16 to FP32 ratio, while the A380E reaches 8.192 TFLOPS with a 2:1 ratio, meaning the MI455X offers more than 19 times the FP16 throughput. Texture rate favors the MI455X at 2,457.6 GTexel/s versus 128.0 GTexel/s, a 19.2 times advantage. The MI455X carries 32,768 shading units against 1,024 shading units for the A380E, a 32 to 1 difference. TMU count also favors the MI455X at 1,024 versus 64, a 16 to 1 margin.

The Intel Arc A380E counters in areas where the MI455X has no functionality. The A380E produces a pixel rate of 64.00 GPixel/s, while the MI455X records 0 MPixel/s because it has no ROPs. The MI455X lists 0 ROPs; the A380E has 32. The A380E also has 8 ray tracing cores, whereas the MI455X lists none. Display output is exclusive to the Intel card, which provides 4x DisplayPort 2.0 connectors; the AMD module has no display outputs at all. The A380E supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI455X reports N/A for all three graphics APIs.

Memory capacity goes decisively to the AMD card. The MI455X integrates 432 GB of HBM4 across a 24576 bit bus, delivering 23.3 TB/s of bandwidth. The A380E uses 6 GB of GDDR6 on a 96 bit bus, yielding 186.0 GB/s. That is a 72 times capacity difference and a 125.3 times bandwidth difference. Clock behavior also differs. The MI455X runs a 1000 MHz base with a 2400 MHz boost, while the A380E runs a flat 2000 MHz base and boost. Memory clocks show the A380E at 1937 MHz, 15.5 Gbps effective, against the MI455X at 1900 MHz, 7.6 Gbps effective. The effective memory rate is higher on the Intel part, but the bus width and memory type overwhelm that advantage in total bandwidth.

The Verdict

The data indicates these two accelerators are built for entirely separate workloads. The AMD Instinct MI455X is a compute-oriented module with 157.3 TFLOPS of FP32, 432 GB of HBM4 memory, and 23.3 TB/s bandwidth. It has no display outputs and no graphics API support, so it cannot act as a conventional GPU for rendering, gaming, or workstation graphics. Its 2300 W TDP and suggested 2700 W PSU confirm a datacenter or accelerator-class deployment.

The Intel Arc A380E is a conventional graphics card. It has 32 ROPs, 8 ray tracing cores, 4x DisplayPort 2.0 outputs, and full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support. Its 75 W TDP and suggested 250 W PSU place it in the low-power segment. Anyone selecting a card for a display-driven system should choose the A380E. Anyone needing raw compute or massive memory capacity with no rendering requirement should choose the MI455X. The MI455X is also the only one of the two with a PCIe 6.0 x16 interface, versus the A380E's PCIe 4.0 x8.

The MI455X has no benchmark entries and no nearest rivals listed, so its percentile of 50 is a placeholder. The same applies to the A380E. The verdict rests on the specification sheet, not on measured performance data.

Architecture Differences

The two processors come from different architecture generations and process nodes. The AMD Instinct MI455X uses the CDNA 5.0 architecture on a 2 nm process at TSMC, with a die size of 2990 mm² and 320,000 million transistors. Transistor density is 107.0M per mm². The Intel Arc A380E uses the Xe-HPG architecture on a 6 nm process at TSMC, with a die size of 157 mm² and 7,200 million transistors. Transistor density is 45.9M per mm². The MI455X die is roughly 19 times larger and contains about 44.4 times more transistors. The process node difference is 2 nm versus 6 nm, a 3 nm gap in lithography.

The chip identifiers reflect the design scale: the MI455X uses the MI450 256CU chip, while the A380E uses DG2-128. The AMD part belongs to the Instinct (MIx) generation, and the Intel part belongs to the Alchemist (Arc 3) generation. The MI455X's predecessor is Radeon Instinct; the A380E's predecessor is Xe Graphics. The A380E's successor is Battlemage, while the MI455X has no successor listed. The A380E is marked as end-of-life, while the MI455X has no production status recorded.

Memory architecture differs fundamentally. The MI455X uses HBM4 with a 24576 bit bus, while the A380E uses GDDR6 with a 96 bit bus. The MI455X has no ROPs and no pixel rate, while the A380E has 32 ROPs and a 64.00 GPixel/s pixel rate. The MI455X also has no ray tracing cores, while the A380E has 8. Shader organization differs as well: the MI455X has 32,768 shading units and 1,024 TMUs, versus 1,024 shading units and 64 TMUs for the A380E.

The MI455X uses an EAM Module slot width, has no power connectors, and lists no dimensions. The A380E is a single-slot card measuring 254 mm by 127 mm by 20 mm, also with no power connectors. The MI455X supports PCIe 6.0 x16; the A380E supports PCIe 4.0 x8. The A380E offers 4x DisplayPort 2.0 outputs; the MI455X offers none. API support is absent on the MI455X and present on the A380E. Release dates differ by over two years: the MI455X launched 2026-07-22, and the A380E launched 2024-03-31.

FAQ

Q: Which card has higher FP32 compute performance?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS of FP32 compute, while the Intel Arc A380E delivers 4.096 TFLOPS.

Q: Does the AMD Instinct MI455X support DirectX or Vulkan?

A: No. The MI455X lists N/A for DirectX, OpenGL, and Vulkan. The Intel Arc A380E supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Can the AMD Instinct MI455X output video to displays?

A: No. The MI455X has no display outputs. The Intel Arc A380E has 4x DisplayPort 2.0 connectors.

Q: How much memory does each card have?

A: The AMD Instinct MI455X has 432 GB of HBM4 memory, while the Intel Arc A380E has 6 GB of GDDR6 memory.

Q: What is the power requirement for each card?

A: The AMD Instinct MI455X has a TDP of 2300 W and a suggested PSU of 2700 W. The Intel Arc A380E has a TDP of 75 W and a suggested PSU of 250 W.

Q: Which card has a smaller process node?

A: The AMD Instinct MI455X uses a 2 nm process, while the Intel Arc A380E uses a 6 nm process.

Q: Does the Intel Arc A380E have ray tracing cores?

A: Yes, the A380E has 8 ray tracing cores. The AMD Instinct MI455X lists no ray tracing cores.

Where Each One Wins

The AMD Instinct MI455X wins in every compute capacity metric recorded. Its 157.3 TFLOPS FP32 output dwarfs the A380E's 4.096 TFLOPS. Its FP16 throughput of 157.3 TFLOPS (1:1) exceeds the A380E's 8.192 TFLOPS (2:1). Texture rate is 2,457.6 GTexel/s versus 128.0 GTexel/s. Memory bandwidth is 23.3 TB/s versus 186.0 GB/s. Memory capacity is 432 GB versus 6 GB. Shading units are 32,768 versus 1,024. TMUs are 1,024 versus 64. The MI455X also has a larger bus width at 24576 bit versus 96 bit. Transistor count is 320,000 million versus 7,200 million, and die size is 2990 mm² versus 157 mm². The MI455X supports PCIe 6.0 x16, while the A380E uses PCIe 4.0 x8.

The Intel Arc A380E wins in every graphics-output and rendering metric. It has 32 ROPs against the MI455X's 0, giving it a 64.00 GPixel/s pixel rate against 0 MPixel/s. It has 8 ray tracing cores against none. It provides 4x DisplayPort 2.0 outputs against no outputs. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI455X reports N/A for all three. The A380E has a higher base clock at 2000 MHz versus 1000 MHz, and a higher effective memory rate at 15.5 Gbps versus 7.6 Gbps. It is also far more power-efficient in absolute terms, with a 75 W TDP versus 2300 W, and a suggested PSU of 250 W versus 2700 W. The A380E is a single-slot card with defined dimensions of 254 mm by 127 mm by 20 mm, while the MI455X is an EAM Module with no listed dimensions. The A380E has a production status of end-of-life and a known successor, Battlemage, while the MI455X has neither.

Specification Differences

The two cards differ across nearly every field. Process node: 2 nm for the MI455X, 6 nm for the A380E. Transistors: 320,000 million versus 7,200 million. Die size: 2990 mm² versus 157 mm². Transistor density: 107.0M per mm² versus 45.9M per mm². Base clock: 1000 MHz versus 2000 MHz. Boost clock: 2400 MHz versus 2000 MHz. Memory clock: 1900 MHz, 7.6 Gbps effective versus 1937 MHz, 15.5 Gbps effective. Memory size: 432 GB versus 6 GB. Memory type: HBM4 versus GDDR6. Bus width: 24576 bit versus 96 bit. Bandwidth: 23.3 TB/s versus 186.0 GB/s. Shading units: 32,768 versus 1,024. TMUs: 1,024 versus 64. ROPs: 0 versus 32. Ray tracing cores: none versus 8. Pixel rate: 0 MPixel/s versus 64.00 GPixel/s. Texture rate: 2,457.6 GTexel/s versus 128.0 GTexel/s. FP32: 157.3 TFLOPS versus 4.096 TFLOPS. FP16: 157.3 TFLOPS (1:1) versus 8.192 TFLOPS (2:1). TDP: 2300 W versus 75 W. Slot width: EAM Module versus single-slot. Power connectors: none for both. Suggested PSU: 2700 W versus 250 W. Bus interface: PCIe 6.0 x16 versus PCIe 4.0 x8. Display outputs: none versus 4x DisplayPort 2.0. DirectX: N/A versus 12 Ultimate (12_2). OpenGL: N/A versus 4.6. Vulkan: N/A versus 1.4. Dimensions: none listed versus 254 mm by 127 mm by 20 mm. Production status: none versus end-of-life. Release date: 2026-07-22 versus 2024-03-31. Predecessor: Radeon Instinct versus Xe Graphics. Successor: none versus Battlemage. Architecture: CDNA 5.0 versus Xe-HPG. Generation: Instinct (MIx) versus Alchemist (Arc 3). Chip: MI450 256CU versus DG2-128. Manufacturer: AMD versus Intel. Foundry: both TSMC.