AMD Instinct MI455X vs Intel Arc Graphics 64EU Mobile Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark results for the AMD Instinct MI455X and the Intel Arc Graphics 64EU Mobile. Both entries hold an identical percentile rank of 50 against all GPUs, and each has an average benchmark score of zero. The absence of measured data makes numerical comparison impossible, but the specification sheets alone establish a fundamental performance gulf.

The AMD Instinct MI455X delivers 157.3 TFLOPS of FP32 compute, while the Intel Arc Graphics 64EU Mobile delivers 1.792 TFLOPS. That represents an 87.8-fold difference in raw single-precision throughput. The gap in FP16 is similarly stark: the AMD part achieves 157.3 TFLOPS with a 1:1 ratio, while the Intel part reaches 3.584 TFLOPS at a 2:1 ratio. Even accounting for the Intel part's doubled FP16 rate relative to its own FP32 output, the AMD accelerator remains roughly 43.9 times faster in half-precision work.

Texture throughput follows the same pattern. The MI455X sustains 2,457.6 GTexel/s, compared to 56.00 GTexel/s for the Arc Graphics 64EU. That is a 43.9-fold advantage. Pixel rate is a different story, because the MI455X reports 0 MPixel/s while the Intel part manages 28.00 GPixel/s. The AMD accelerator has no ROPs, meaning it cannot rasterize in the conventional sense; it is not designed for display output at all. The Intel part, by contrast, includes 16 ROPs and is built for rendering to portable device displays.

Clock behavior shows opposite design philosophies. The MI455X runs at a base of 1000 MHz and boosts to 2400 MHz, a 2.4x multiplier. The Arc Graphics 64EU Mobile starts at 300 MHz and boosts to 1750 MHz, a 5.8x multiplier. The Intel part relies on aggressive boost scaling to reach its modest peak, while the AMD part operates at a higher floor for sustained datacenter workloads.

Shader resources are equally lopsided. The MI455X packs 32,768 shading units and 1,024 TMUs. The Intel GPU has 512 shading units and 32 TMUs. Both parts list no dedicated ray tracing cores or tensor cores in the database, though the AMD accelerator's CDNA 5.0 architecture is compute-oriented rather than graphics-oriented.

Memory capacity and bandwidth amplify the compute disparity. The MI455X ships with 432 GB of HBM4 across a 24,576-bit bus, yielding 23.3 TB/s of bandwidth. The Arc Graphics 64EU Mobile uses system shared memory, with system-dependent bandwidth and no dedicated VRAM. The AMD module's memory clock is 1900 MHz at 7.6 Gbps effective, while the Intel part's memory clock is simply listed as system shared.

FAQ

Q: Which GPU has more shading units?

A: The AMD Instinct MI455X has 32,768 shading units, compared to 512 for the Intel Arc Graphics 64EU Mobile.

Q: What is the FP32 performance difference?

A: The MI455X delivers 157.3 TFLOPS, while the Arc Graphics 64EU Mobile delivers 1.792 TFLOPS, making the AMD part roughly 87.8 times higher.

Q: Does either GPU support DirectX?

A: The Intel Arc Graphics 64EU Mobile supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. The AMD Instinct MI455X lists N/A for all graphics APIs, reflecting its lack of display outputs and rasterization hardware.

Q: What memory configurations do the two use?

A: The MI455X uses 432 GB of HBM4 on a 24,576-bit bus with 23.3 TB/s bandwidth. The Arc Graphics 64EU Mobile uses system shared memory with system-dependent bandwidth.

Q: What are the power requirements?

A: The MI455X has a TDP of 2300 W and a suggested PSU of 2700 W. The Arc Graphics 64EU Mobile has a TDP of 65 W and no suggested PSU listed.

Q: How do the clock speeds compare?

A: The MI455X has a 1000 MHz base clock and 2400 MHz boost. The Arc Graphics 64EU Mobile has a 300 MHz base and 1750 MHz boost.

Where Each One Wins

The AMD Instinct MI455X wins decisively in compute density. Its 157.3 TFLOPS of FP32 and FP16 performance targets massive parallel workloads such as AI training, scientific simulation, and datacenter-scale matrix operations. The 432 GB of HBM4 memory with 23.3 TB/s bandwidth eliminates the need for frequent host transfers, and the 24,576-bit bus width allows enormous data sets to remain resident on the accelerator. The 2 nm TSMC process node keeps 320,000 million transistors within a 2990 mm² die, producing a transistor density of 107.0M per mm². This is a throughput engine, not a rendering device.

The Intel Arc Graphics 64EU Mobile wins in graphics output and integration. It includes 16 ROPs and a 28.00 GPixel/s pixel rate, supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4, and provides portable device dependent display outputs. Its 65 W TDP fits inside a laptop-class thermal envelope, and the Ring Bus interface connects directly to the host processor. The 2:1 FP16 ratio (3.584 TFLOPS) gives it a modest boost for half-precision workloads, though its primary role remains integrated graphics for everyday rendering and media tasks.

The MI455X has no display outputs and no graphics API support, so it cannot drive a monitor or run game workloads. The Arc Graphics 64EU Mobile cannot approach the MI455X's compute throughput or memory bandwidth, and its system shared memory imposes a hard ceiling on large-scale data processing. These are complementary products aimed at different segments: one for rack-mounted acceleration, the other for thin-and-light portables.

Specification Differences

The process nodes differ sharply: the MI455X uses a 2 nm TSMC process, while the Arc Graphics 64EU Mobile uses a 10 nm Intel process. The AMD chip is built by TSMC, the Intel chip by Intel's own fabs. Transistor count is only listed for the AMD part at 320,000 million, with a die size of 2990 mm². The Intel part lists no transistor count, die size, or density figures.

Clocks differ in both base and boost: 1000 MHz base and 2400 MHz boost for the MI455X, versus 300 MHz base and 1750 MHz boost for the Intel GPU. Memory configurations are entirely different: 432 GB HBM4 with a 24,576-bit bus and 23.3 TB/s bandwidth for the AMD part, versus system shared memory with system-dependent bandwidth for the Intel part. The MI455X memory clock is 1900 MHz at 7.6 Gbps effective; the Intel part has no independent memory clock.

Shader resources differ: 32,768 shading units, 1,024 TMUs, and 0 ROPs for the AMD part, versus 512 shading units, 32 TMUs, and 16 ROPs for the Intel part. Pixel rate is 0 MPixel/s for the MI455X and 28.00 GPixel/s for the Arc Graphics 64EU. Texture rate is 2,457.6 GTexel/s versus 56.00 GTexel/s. FP32 is 157.3 TFLOPS versus 1.792 TFLOPS. FP16 is 157.3 TFLOPS (1:1) versus 3.584 TFLOPS (2:1).

Power figures diverge by an order of magnitude: 2300 W TDP and 2700 W suggested PSU for the MI455X, 65 W TDP and no suggested PSU for the Intel part. The AMD accelerator uses an EAM Module slot width with no power connectors, while the Intel part is an IGP with no connector data. Bus interfaces differ: PCIe 6.0 x16 for the MI455X, Ring Bus for the Arc Graphics 64EU.

Display outputs are absent on the MI455X, listed as no outputs, while the Intel part is portable device dependent. API support is N/A for the AMD part; the Intel part supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. Production status is not listed for the AMD part, while the Intel part is active. Release dates differ: the MI455X is dated 2026-07-22, the Arc Graphics 64EU Mobile 2023-12-13. Predecessors also differ: Radeon Instinct for the AMD part, HD Graphics-M for the Intel part.

Architecture Differences

The MI455X uses CDNA 5.0 architecture, AMD's compute-focused design lineage. The chip identifier is MI450 256CU, indicating 256 compute units, and the generation is Instinct (MIx). This architecture prioritizes raw FP32 and FP16 throughput, massive memory bandwidth, and high power tolerance. The 2 nm TSMC process allows 320,000 million transistors in a 2990 mm² die, a density of 107.0M per mm². The absence of ROPs and display outputs confirms that this is not a graphics pipeline; it is a pure accelerator.

The Arc Graphics 64EU Mobile uses Xe-LPG architecture on the Meteor Lake chip. The generation is Arc Graphics-M (Meteor Lake), and it is built on Intel's 10 nm process. The architecture includes 64 execution units, which translate to 512 shading units. The 2:1 FP16 ratio suggests a design that doubles half-precision throughput without dedicating separate tensor hardware. The Ring Bus interface ties it into the host processor's memory subsystem, making system shared memory the only viable memory path.

The MI455X supports PCIe 6.0 x16, a high-bandwidth host interface for datacenter integration. The Intel part uses Ring Bus, a low-latency internal fabric suited to mobile SoC designs. The AMD part has no power connectors listed, likely because an EAM Module receives power through its mounting interface. The Intel part is an IGP, drawing power from the motherboard socket.

API support differences reflect their intended roles. The MI455X lists N/A for DirectX, OpenGL, and Vulkan, meaning it exposes no conventional graphics drivers. The Arc Graphics 64EU Mobile exposes full graphics stacks: DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. This is the clearest architectural signal: one part is built for compute workloads accessed through accelerators, the other for on-screen rendering in mobile devices.

The MI455X's 23.3 TB/s memory bandwidth and 432 GB capacity are enabled by HBM4 stacking across a 24,576-bit interface. The Intel part's system dependent bandwidth cannot compete, but it also does not need to; its workloads are bound by power and thermal limits, not memory throughput. The clock strategy reinforces this: the AMD part holds a 1000 MHz base for sustained operation, while the Intel part idles at 300 MHz and boosts to 1750 MHz when needed.