AMD Instinct MI455X vs Intel Arc Graphics 128EU Mobile Comparison

Head-to-Head Benchmarks

The recorded database contains no head-to-head benchmark results for the AMD Instinct MI455X versus the Intel Arc Graphics 128EU Mobile. Both entries list an average benchmark score of 0 and a percentile rank of 50 against all GPUs, with no nearest rivals defined. The absence of measured data means no direct performance comparison can be drawn from the database for these two accelerators.

The AMD Instinct MI455X delivers 157.3 TFLOPS of FP32 compute and 157.3 TFLOPS of FP16 compute with a 1:1 ratio. The Intel Arc Graphics 128EU Mobile provides 4.608 TFLOPS of FP32 and 9.216 TFLOPS of FP16 with a 2:1 ratio. These figures indicate the AMD part holds a 34.1x advantage in FP32 throughput and a 17.1x advantage in FP16 throughput, based solely on the recorded specifications.

Texture rate differences are similarly pronounced. The MI455X achieves 2,457.6 GTexel/s, while the Intel part reaches 144.0 GTexel/s, a 17.1x gap. Pixel rate tells a different story: the MI455X is recorded at 0 MPixel/s because it has 0 ROPs, whereas the Intel Arc Graphics 128EU Mobile reaches 72.00 GPixel/s. This makes the Intel part the only one of the two with a defined pixel output capability in the database.

Memory bandwidth separates the two by an enormous margin. The MI455X uses 432 GB of HBM4 memory across a 24576-bit bus, yielding 23.3 TB/s of bandwidth. The Intel part relies on System Shared memory with System Dependent bandwidth, meaning no fixed figure is recorded. The AMD accelerator's bandwidth is a fixed, discrete specification, while Intel's is variable by system configuration.

Clock behavior also differs. The MI455X runs at a 1000 MHz base and 2400 MHz boost. The Intel part starts at 300 MHz base and boosts to 2250 MHz. The AMD part has a higher base clock by 700 MHz and a higher boost clock by 150 MHz.

FAQ

Q: What is the FP32 compute difference between the two?

A: The AMD Instinct MI455X records 157.3 TFLOPS of FP32, while the Intel Arc Graphics 128EU Mobile records 4.608 TFLOPS. The AMD part delivers 34.1x the FP32 throughput of the Intel part.

Q: Which GPU has a higher boost clock?

A: The AMD Instinct MI455X boosts to 2400 MHz, which is 150 MHz higher than the Intel Arc Graphics 128EU Mobile's 2250 MHz boost. The AMD base clock is 1000 MHz versus Intel's 300 MHz.

Q: How do the memory subsystems compare?

A: The MI455X uses 432 GB of HBM4 with a 24576-bit bus and 23.3 TB/s bandwidth. The Intel part uses System Shared memory with System Dependent bandwidth, so no fixed capacity or throughput is recorded.

Q: Does the Intel part support any graphics APIs?

A: Yes, the Intel Arc Graphics 128EU Mobile supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. The AMD Instinct MI455X records N/A for DirectX, OpenGL, and Vulkan.

Q: What are the thermal design power figures?

A: The MI455X has a 2300 W TDP with a suggested PSU of 2700 W. The Intel part has a 28 W TDP and no suggested PSU recorded.

Q: Which part has more shading units?

A: The AMD Instinct MI455X has 32,768 shading units, while the Intel Arc Graphics 128EU Mobile has 1,024. The AMD part also has 1,024 TMUs versus Intel's 64, but Intel has 32 ROPs while AMD has 0.

Where Each One Wins

The AMD Instinct MI455X wins decisively in raw compute throughput. Its 157.3 TFLOPS FP32 and FP16 figures dwarf the Intel part's 4.608 and 9.216 TFLOPS respectively. The texture rate of 2,457.6 GTexel/s versus 144.0 GTexel/s reinforces this compute advantage. The 432 GB HBM4 pool with 23.3 TB/s bandwidth positions the MI455X for workloads that demand massive memory capacity and sustained data movement, such as large model inference or training datasets.

The Intel Arc Graphics 128EU Mobile wins in areas where the MI455X has no recorded capability. The Intel part is the only one with a defined pixel rate (72.00 GPixel/s) and has 32 ROPs, meaning it can drive display output and rasterization pipelines. The MI455X records 0 MPixel/s and 0 ROPs, making it unsuitable for traditional graphics rendering tasks. The Intel part also supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4, while the AMD part records N/A for all three. For portable graphics workloads, the Intel part's 28 W TDP and IGP slot width fit into mobile form factors, whereas the MI455X's 2300 W TDP and EAM Module slot width require a completely different class of system.

The bus interface differentiates their integration paths. The MI455X uses PCIe 6.0 x16, a discrete expansion interface. The Intel part uses Ring Bus, tying it to the processor package. This means the Intel part functions as an integrated solution, while the AMD part is a standalone accelerator module.

Specification Differences

The two parts differ across nearly every recorded specification. The AMD Instinct MI455X uses a 2 nm process node from TSMC, while the Intel Arc Graphics 128EU Mobile uses a 10 nm node from Intel. The MI455X records 320,000 million transistors on a 2990 mm² die, giving a transistor density of 107.0M per mm². The Intel part records no transistor count, die size, or density.

Memory configuration differs completely. The MI455X has 432 GB of HBM4 with a 24576-bit bus and 23.3 TB/s bandwidth. The Intel part uses System Shared memory with System Dependent bandwidth. The MI455X has 32,768 shading units, 1,024 TMUs, and 0 ROPs. The Intel part has 1,024 shading units, 64 TMUs, and 32 ROPs.

Clock speeds differ in both base and boost. The MI455X runs at 1000 MHz base and 2400 MHz boost. The Intel part runs at 300 MHz base and 2250 MHz boost. The MI455X draws 2300 W TDP with a suggested PSU of 2700 W and no power connectors. The Intel part draws 28 W TDP with no power connector data and no suggested PSU.

Physical integration differs. The MI455X is an EAM Module with no display outputs. The Intel part is an IGP with Portable Device Dependent display outputs. The MI455X uses PCIe 6.0 x16, while the Intel part uses Ring Bus. Release dates differ by over two years: the Intel part released on 2023-12-13, and the AMD part on 2026-07-22.

Architecture Differences

The AMD Instinct MI455X is built on CDNA 5.0 architecture with the MI450 256CU chip, belonging to the Instinct (MIx) generation. The Intel Arc Graphics 128EU Mobile uses Xe-LPG architecture with the Meteor Lake chip, belonging to the Arc Graphics-M (Meteor Lake) generation. These are fundamentally different architectural families: CDNA is AMD's compute-focused line for accelerators, while Xe-LPG is Intel's graphics architecture for integrated and discrete GPUs.

Process technology separates them at the foundry level. The MI455X uses a 2 nm node from TSMC, while the Intel part uses a 10 nm node from Intel. The MI455X records 320,000 million transistors, a figure absent for the Intel part.

Memory architecture differs at the fundamental level. The MI455X uses dedicated HBM4 memory with a fixed 24576-bit interface and 23.3 TB/s bandwidth. The Intel part uses System Shared memory, meaning it shares the system's main memory pool with bandwidth that is System Dependent. This reflects different design philosophies: the AMD part dedicates a massive on-package memory pool, while the Intel part relies on the host system's memory subsystem.

Compute ratios differ between the two. The MI455X records FP16 at 157.3 TFLOPS with a 1:1 ratio to FP32, indicating equal throughput for both precisions. The Intel part records FP16 at 9.216 TFLOPS with a 2:1 ratio to FP32, meaning its FP16 throughput is double its FP32 rate. This indicates different architectural approaches to mixed-precision compute.

API support marks another architectural divergence. The MI455X records N/A for DirectX, OpenGL, and Vulkan, indicating no graphics API support. The Intel part records DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4, making it a full-featured graphics solution. The MI455X also records 0 ROPs and 0 MPixel/s pixel rate, confirming it has no rasterization pipeline, while the Intel part has 32 ROPs and 72.00 GPixel/s.