AMD Instinct MI455X vs Intel Arc Graphics 4 Xe Mobile Comparison

AMD Instinct MI455X and Intel Arc Graphics 4 Xe Mobile occupy opposite ends of the hardware spectrum. The Instinct MI455X is a massive accelerator module designed for compute-dense workloads, while the Arc Graphics 4 Xe Mobile is a low-power integrated GPU for portable devices. The recorded data shows no shared benchmark scores, so the comparison rests entirely on architectural and specification differences.

Head-to-Head Benchmarks

The database contains no overlapping benchmark results for these two parts. The AMD Instinct MI455X has an average benchmark score of 0, and the Intel Arc Graphics 4 Xe Mobile also has an average benchmark score of 0. Both parts sit at the 50th percentile versus all GPUs in the database, but this percentile reflects the absence of recorded measurements rather than parity in performance. With no head-to-head benchmark entries and no nearest rivals listed for either product, direct performance comparisons cannot be drawn from measured data.

The absence of benchmark data is itself informative. The Instinct MI455X targets a segment where synthetic gaming benchmarks do not apply. Its API support is listed as N/A for DirectX, OpenGL, and Vulkan, which indicates it is not designed for the standard graphics benchmark suites. The Arc Graphics 4 Xe Mobile, by contrast, supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, meaning it can run conventional graphics benchmarks. The data shows zero recorded wins for either product, with winsA at 0 and winsB at 0.

The Verdict

The data indicates these are not competing products. The Instinct MI455X delivers 157.3 TFLOPS of FP32 performance and 157.3 TFLOPS of FP16 performance with a 1:1 ratio. The Arc Graphics 4 Xe Mobile delivers 2.355 TFLOPS of FP32 and 4.710 TFLOPS of FP16 with a 2:1 ratio. The Instinct MI455X provides roughly 66 times the FP32 throughput of the Arc part, based on these figures. The Instinct MI455X also has a 2300 W TDP and requires a 2700 W suggested power supply, while the Arc Graphics 4 Xe Mobile has a 25 W TDP and no suggested PSU listed. These are different classes of hardware.

For compute-heavy tasks that can use FP32 or FP16 arithmetic at scale, the Instinct MI455X is the only viable option from the data. It offers 32768 shading units, 1024 texture mapping units, and a texture rate of 2,457.6 GTexel/s. The Arc Graphics 4 Xe Mobile offers 512 shading units, 32 TMUs, and a texture rate of 73.60 GTexel/s. The Instinct MI455X has 64 times the shading units and 32 times the TMUs of the Arc part. The memory subsystem separates them further: the Instinct MI455X has 432 GB of HBM4 memory on a 24576-bit bus with 23.3 TB/s of bandwidth, while the Arc part uses system shared memory with system dependent bandwidth.

Where Each One Wins

The Instinct MI455X wins in raw compute throughput, memory capacity, memory bandwidth, and texture throughput. Its FP32 output of 157.3 TFLOPS compares to 2.355 TFLOPS for the Arc part. Its FP16 output of 157.3 TFLOPS compares to 4.710 TFLOPS for the Arc part. The 432 GB of HBM4 memory with 23.3 TB/s bandwidth dwarfs the system shared memory configuration of the Arc Graphics 4 Xe Mobile. The 24576-bit memory bus allows data movement at a scale that the Arc part cannot approach, as its bus width is listed as system shared.

The Arc Graphics 4 Xe Mobile wins in power efficiency and portability. Its 25 W TDP versus 2300 W TDP means it can operate in devices without dedicated power connectors or large power supplies. The Instinct MI455X has no power connectors listed but requires a 2700 W suggested PSU, which confines it to specialized systems. The Arc part is an IGP with a slot width of IGP, so it fits directly into a processor package. The Instinct MI455X is an EAM Module, a separate accelerator board. The Arc Graphics 4 Xe Mobile has 16 ROPs and a pixel rate of 36.80 GPixel/s, while the Instinct MI455X has 0 ROPs and a pixel rate of 0 MPixel/s. For any rasterization or pixel output work, the Arc part has the only recorded capability.

The Arc part also supports display outputs, listed as portable device dependent, while the Instinct MI455X has no outputs. The Arc Graphics 4 Xe Mobile includes 4 ray tracing cores; the Instinct MI455X lists no ray tracing cores. In graphics API compatibility, the Arc part supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the Instinct MI455X lists N/A for all three. The Instinct MI455X cannot run standard graphics applications, but the Arc part can.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS FP32, compared to 2.355 TFLOPS for the Intel Arc Graphics 4 Xe Mobile.

Q: What memory configurations do these two GPUs use?

A: The Instinct MI455X uses 432 GB of HBM4 memory on a 24576-bit bus with 23.3 TB/s bandwidth. The Arc Graphics 4 Xe Mobile uses system shared memory with system dependent bandwidth and a system shared bus width.

Q: Do both GPUs support ray tracing?

A: No. The Intel Arc Graphics 4 Xe Mobile has 4 ray tracing cores. The AMD Instinct MI455X lists no ray tracing cores in the data.

Q: What are the power requirements for each part?

A: The Instinct MI455X has a TDP of 2300 W and a suggested power supply of 2700 W. The Arc Graphics 4 Xe Mobile has a TDP of 25 W and no suggested power supply listed.

Q: Which GPU supports standard graphics APIs?

A: The Arc Graphics 4 Xe Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Instinct MI455X lists N/A for DirectX, OpenGL, and Vulkan.

Q: What is the texture rate difference?

A: The Instinct MI455X has a texture rate of 2,457.6 GTexel/s with 1024 TMUs. The Arc Graphics 4 Xe Mobile has a texture rate of 73.60 GTexel/s with 32 TMUs.

Architecture Differences

The AMD Instinct MI455X uses the CDNA 5.0 architecture on the MI450 256CU chip. It belongs to the Instinct (MIx) generation. The Intel Arc Graphics 4 Xe Mobile uses the Xe3-LPG architecture on the Panther Lake chip and belongs to the Arc Graphics-M (Panther Lake) generation. The Instinct MI455X has a 2 nm process node from TSMC and contains 320,000 million transistors on a 2990 mm² die, yielding a transistor density of 107.0M per mm². The Arc Graphics 4 Xe Mobile uses a 3 nm process node from Intel, with transistor count and die size listed as unknown.

The Instinct MI455X has 32768 shading units, 1024 TMUs, and 0 ROPs. The Arc Graphics 4 Xe Mobile has 512 shading units, 32 TMUs, and 16 ROPs. The Instinct MI455X has a base clock of 1000 MHz and a boost clock of 2400 MHz, with memory clocked at 1900 MHz and 7.6 Gbps effective. The Arc part has a base clock of 300 MHz and a boost clock of 2300 MHz. The Instinct MI455X has no display outputs, while the Arc part has portable device dependent outputs. The Instinct MI455X uses a PCIe 6.0 x16 bus interface, while the Arc part uses an IGP bus interface.

The Instinct MI455X has both FP32 and FP16 at 157.3 TFLOPS with a 1:1 ratio, indicating equal throughput for both precision formats. The Arc Graphics 4 Xe Mobile has FP32 at 2.355 TFLOPS and FP16 at 4.710 TFLOPS with a 2:1 ratio, meaning its FP16 throughput is double its FP32 throughput. The Instinct MI455X has a pixel rate of 0 MPixel/s, while the Arc part has a pixel rate of 36.80 GPixel/s. The Instinct MI455X is an EAM Module with no power connectors, while the Arc part is an IGP with no power connectors. The Instinct MI455X does not report DirectX, OpenGL, or Vulkan support, while the Arc part reports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Specification Differences

The release dates differ. The Intel Arc Graphics 4 Xe Mobile has a release date of 2026-01-26, and the AMD Instinct MI455X has a release date of 2026-07-22. The production status of the Arc part is listed as Active, while the Instinct MI455X has no production status listed. The Instinct MI455X lists its predecessor as Radeon Instinct, while the Arc part has no predecessor listed. Neither part has a successor listed.

The process nodes differ: the Instinct MI455X uses 2 nm from TSMC, while the Arc part uses 3 nm from Intel. Transistor counts differ, with the Instinct MI455X at 320,000 million transistors and the Arc part at unknown. Die sizes differ, with the Instinct MI455X at 2990 mm² and the Arc part at unknown. Transistor density for the Instinct MI455X is 107.0M per mm², while the Arc part has no density listed. The memory type differs: HBM4 for the Instinct MI455X versus system shared for the Arc part. Memory size is 432 GB for the Instinct MI455X versus system shared for the Arc part. Memory bus width is 24576 bit for the Instinct MI455X versus system shared for the Arc part. Memory bandwidth is 23.3 TB/s for the Instinct MI455X versus system dependent for the Arc part.

The TDP differs significantly: 2300 W for the Instinct MI455X versus 25 W for the Arc part. The suggested PSU is 2700 W for the Instinct MI455X, with none listed for the Arc part. Slot width is EAM Module for the Instinct MI455X versus IGP for the Arc part. Bus interface is PCIe 6.0 x16 for the Instinct MI455X versus IGP for the Arc part. Display outputs are none for the Instinct MI455X versus portable device dependent for the Arc part. The Instinct MI455X has 0 ROPs and 0 MPixel/s pixel rate, while the Arc part has 16 ROPs and 36.80 GPixel/s pixel rate. The Instinct MI455X has no ray tracing cores, while the Arc part has 4. The Instinct MI455X has 157.3 TFLOPS FP32 and 157.3 TFLOPS FP16 (1:1), while the Arc part has 2.355 TFLOPS FP32 and 4.710 TFLOPS FP16 (2:1). The Instinct MI455X has a texture rate of 2,457.6 GTexel/s with 1024 TMUs, while the Arc part has 73.60 GTexel/s with 32 TMUs. The Instinct MI455X has 32768 shading units, while the Arc part has 512. The base clocks are 1000 MHz for the Instinct MI455X versus 300 MHz for the Arc part, and boost clocks are 2400 MHz versus 2300 MHz. The memory clock is 1900 MHz with 7.6 Gbps effective for the Instinct MI455X, while the Arc part lists system shared memory. The Instinct MI455X does not report DirectX, OpenGL, or Vulkan support, while the Arc part reports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Arc part is produced by Intel on its own foundry, while the Instinct MI455X is produced by AMD at TSMC.