AMD Instinct MI455X vs Intel Arc A380E x2 Comparison

Head-to-Head Benchmarks

The database contains no recorded benchmark scores for either the AMD Instinct MI455X or the Intel Arc A380E x2. Both entries show an average benchmark score of zero and no head-to-head benchmark results, making direct performance comparisons impossible from the measured data. The wins column for each product also sits at zero, confirming that no competitive benchmark submissions have been logged for this pairing.

Without recorded scores, the analysis must rely entirely on the architectural and specification data available. The AMD Instinct MI455X carries a FP32 compute rating of 157.3 TFLOPS, while the Intel Arc A380E x2 delivers 4.096 TFLOPS in FP32. That difference places the AMD part at roughly 38 times the raw floating-point throughput of the Intel part, a substantial gap that would dominate any compute-oriented workload. In FP16, the MI455X again posts 157.3 TFLOPS with a 1:1 ratio, whereas the A380E x2 reaches 8.192 TFLOPS with a 2:1 ratio, meaning the Intel part halves its FP16 rate when compared to FP32, while the AMD part maintains parity.

Texture throughput follows a similar pattern. The MI455X achieves 2,457.6 GTexel/s across 1,024 texture mapping units, while the A380E x2 manages 128.0 GTexel/s from 64 TMUs. The pixel rate tells a different story, however: the MI455X records 0 MPixel/s with zero ROPs, indicating it is not designed for rasterized pixel output at all. The A380E x2, with 32 ROPs, posts 64.00 GPixel/s, making it the only one of the two capable of traditional display rendering. This fundamental divergence means the two products target entirely different workloads, and the lack of benchmark data reflects that they occupy separate niches rather than competing directly.

FAQ

Q: Which product has higher FP32 compute performance?

A: The AMD Instinct MI455X records 157.3 TFLOPS in FP32, while the Intel Arc A380E x2 records 4.096 TFLOPS. The AMD part delivers roughly 38 times the FP32 throughput.

Q: Does the Intel Arc A380E x2 support ray tracing?

A: Yes, the Intel Arc A380E x2 includes 8 ray tracing cores. The AMD Instinct MI455X has no ray tracing core count listed in the database.

Q: What memory configurations do the two products use?

A: The AMD Instinct MI455X uses 432 GB of HBM4 memory on a 24,576-bit bus with 23.3 TB/s bandwidth. The Intel Arc A380E x2 uses 6 GB of GDDR6 memory on a 96-bit bus with 186.0 GB/s bandwidth.

Q: Which product has display outputs?

A: Only the Intel Arc A380E x2 has display outputs, featuring 8x mini-DisplayPort 2.0. The AMD Instinct MI455X has no display outputs.

Q: What are the power requirements for each?

A: The AMD Instinct MI455X has a TDP of 2300 W and a suggested PSU of 2700 W. The Intel Arc A380E x2 has a TDP of 130 W and a suggested PSU of 300 W.

Q: Which API support does each product offer?

A: The Intel Arc A380E x2 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD Instinct MI455X lists N/A for DirectX, OpenGL, and Vulkan, indicating no graphics API support.

Architecture Differences

The AMD Instinct MI455X is built on the CDNA 5.0 architecture, AMD's compute-focused design lineage, while the Intel Arc A380E x2 uses the Xe-HPG architecture from Intel's Alchemist generation. These are fundamentally different design philosophies. CDNA 5.0 prioritizes data center compute throughput, whereas Xe-HPG is a gaming and graphics-oriented architecture.

The manufacturing processes differ significantly. The MI455X uses a 2 nm process at TSMC with 320,000 million transistors on a 2990 mm² die, yielding a transistor density of 107.0M per mm². The A380E x2 uses a 6 nm process at TSMC with 7,200 million transistors on a 157 mm² die, yielding 45.9M per mm². The AMD part crams over 44 times more transistors into a die nearly 19 times larger.

The memory subsystems are radically different. The MI455X employs HBM4 memory with 432 GB capacity, a 24,576-bit bus, and 23.3 TB/s bandwidth. The A380E x2 uses GDDR6 with 6 GB capacity, a 96-bit bus, and 186.0 GB/s bandwidth. The AMD memory bandwidth exceeds the Intel part by more than 125 times, which is essential for feeding the MI455X's massive compute arrays.

Shader and texture resources also diverge sharply. The MI455X has 32,768 shading units and 1,024 TMUs, while the A380E x2 has 1,024 shading units and 64 TMUs. The Intel part includes 32 ROPs and 8 ray tracing cores, while the AMD part has zero ROPs and no listed ray tracing cores. This confirms that the MI455X is not designed for rasterization or ray-traced graphics, but purely for parallel compute workloads.

Specification Differences

The two products differ across nearly every recorded specification field. The AMD Instinct MI455X uses the MI450 256CU chip, while the Intel Arc A380E x2 uses the DG2-128 chip. The MI455X belongs to the Instinct (MIx) generation, while the A380E x2 belongs to the Alchemist (Arc 3) generation.

Clock speeds differ in both base and boost. The MI455X runs at 1000 MHz base and 2400 MHz boost. The A380E x2 runs at 2000 MHz base and 2000 MHz boost, meaning it has no boost headroom above its base clock. Memory clocks also differ: the MI455X runs at 1900 MHz (7.6 Gbps effective), while the A380E x2 runs at 1937 MHz (15.5 Gbps effective).

Bus interfaces are different. The MI455X uses PCIe 6.0 x16, while the A380E x2 uses PCIe 4.0 x8. Power delivery also differs: the MI455X is an EAM Module with no power connectors and a 2300 W TDP, while the A380E x2 is a single-slot card with one 6-pin connector and a 130 W TDP.

Physical dimensions are only recorded for the A380E x2: 265 mm length, 127 mm height, and 20 mm width. The MI455X has no recorded dimensions. The A380E x2 is marked as end-of-life production status, while the MI455X has no production status recorded. The A380E x2 was released on 2024-03-31, while the MI455X has a release date of 2026-07-22. The A380E x2 lists its predecessor as Xe Graphics and successor as Battlemage, while the MI455X lists its predecessor as Radeon Instinct with no successor recorded.

The Verdict

The recorded data shows two products with no overlap in purpose. The AMD Instinct MI455X is a compute accelerator with enormous FP32 and FP16 throughput, massive HBM4 memory capacity, and no display outputs or graphics API support. It consumes 2300 W and requires a 2700 W power supply, making it suitable only for dedicated compute installations. The Intel Arc A380E x2 is a compact graphics card with display outputs, ray tracing cores, and full DirectX, OpenGL, and Vulkan support, drawing only 130 W.

The MI455X's 157.3 TFLOPS FP32 rate, 432 GB memory capacity, and 23.3 TB/s bandwidth position it for large-scale data center workloads such as AI training or scientific simulation. The A380E x2's 4.096 TFLOPS FP32 rate, 6 GB memory, and 186.0 GB/s bandwidth position it for embedded graphics or multi-display output scenarios, evidenced by its 8x mini-DisplayPort 2.0 connections. Neither product can substitute for the other in its intended role.

Where Each One Wins

The AMD Instinct MI455X wins in every compute throughput metric. Its FP32 rate of 157.3 TFLOPS and FP16 rate of 157.3 TFLOPS dwarf the A380E x2's 4.096 TFLOPS and 8.192 TFLOPS respectively. The texture rate of 2,457.6 GTexel/s versus 128.0 GTexel/s gives the MI455X a massive edge in any texture-heavy compute workload. The 432 GB HBM4 memory with 23.3 TB/s bandwidth versus 6 GB GDDR6 with 186.0 GB/s bandwidth means the MI455X can hold and process far larger datasets without memory bottlenecks.

The Intel Arc A380E x2 wins in graphics-oriented capabilities. It has 32 ROPs delivering 64.00 GPixel/s, while the MI455X has 0 MPixel/s pixel rate. The A380E x2 includes 8 ray tracing cores, which the MI455X lacks entirely. The A380E x2 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI455X lists N/A for all three. The A380E x2 provides 8x mini-DisplayPort 2.0 outputs, while the MI455X has no display outputs. The A380E x2's 130 W TDP and 300 W suggested PSU also make it deployable in much smaller systems compared to the MI455X's 2300 W TDP and 2700 W suggested PSU. The A380E x2 additionally has a recorded physical footprint of 265 mm by 127 mm by 20 mm, whereas the MI455X has no recorded dimensions, suggesting the Intel part fits standard chassis layouts.