AMD Instinct MI325X vs Intel Arc G3 Comparison

FAQ

Q: What are the fundamental differences in process node and foundry between the AMD Instinct MI325X and the Intel Arc G3?

A: The AMD Instinct MI325X uses a 5 nm process from TSMC, while the Intel Arc G3 uses a 3 nm process from Intel. The MI325X has 153,000 million transistors on a 1017 mm² die, whereas the Arc G3's transistor count and die size are listed as unknown.

Q: How do the memory configurations compare between the two GPUs?

A: The AMD Instinct MI325X has 256 GB of HBM3e memory with an 8192-bit bus and 6.14 TB/s bandwidth. The Intel Arc G3 uses System Shared memory with a System Dependent bandwidth, meaning its memory performance is tied to the host system.

Q: What is the difference in shading unit count?

A: The AMD Instinct MI325X has 19,456 shading units, while the Intel Arc G3 has 1,280. This is a 15.2 times difference in raw shader count, which heavily favors the MI325X in parallel compute workloads.

Q: Which GPU supports more advanced graphics APIs?

A: The Intel Arc G3 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD Instinct MI325X reports N/A for DirectX, OpenGL, and Vulkan, indicating it is not designed for traditional graphics API workloads.

Q: What are the TDP ratings for each GPU?

A: The AMD Instinct MI325X has a TDP of 1000 W with a suggested power supply of 1400 W. The Intel Arc G3 has a TDP of 25 W and no suggested PSU listed, reflecting its integrated graphics positioning.

Q: What are the release dates for these products?

A: The AMD Instinct MI325X was released on 2024-10-09, and the Intel Arc G3 is scheduled for release on 2026-05-31.

Architecture Differences

The AMD Instinct MI325X and Intel Arc G3 represent two entirely different design philosophies within the GPU landscape. The MI325X is built on the CDNA 3.0 architecture, specifically designed for compute acceleration, while the Arc G3 uses the Xe3-LPG architecture, which targets integrated graphics for mobile platforms.

The manufacturing process differs substantially. The MI325X uses a 5 nm process from TSMC, while the Arc G3 uses a 3 nm process from Intel. The MI325X packs 153,000 million transistors onto a 1017 mm² die, achieving a transistor density of 150.4M per mm². The Arc G3's transistor count and die size are unknown, but its 3 nm process suggests a more modern fabrication technology.

Clock speeds reveal the different design targets. The MI325X runs at a base clock of 1000 MHz with a boost of 2100 MHz, while the Arc G3 has a much lower base of 300 MHz but boosts to 2400 MHz. This indicates the MI325X is optimized for sustained heavy compute, whereas the Arc G3 can spike to higher clocks when needed but idles much lower.

Memory architecture is where the divide becomes stark. The MI325X features 256 GB of HBM3e memory with an 8192-bit bus width, delivering 6.14 TB/s of bandwidth. The Arc G3 uses System Shared memory with System Dependent bandwidth, meaning it relies on the host system's memory subsystem rather than dedicated VRAM.

The MI325X has 19,456 shading units, 1,216 TMUs, and zero ROPs, which is consistent with a compute-focused accelerator that does not perform traditional rasterization. The Arc G3 has 1,280 shading units, 40 TMUs, and 20 ROPs, along with 10 ray tracing cores. The MI325X reports N/A for ray tracing cores, reinforcing that it is not built for graphics rendering.

Power consumption highlights the philosophical difference. The MI325X has a TDP of 1000 W and requires a 1400 W suggested power supply, while the Arc G3 sips at 25 W. The MI325X is an OAM Module with no display outputs, while the Arc G3 is an IGP with Portable Device Dependent display outputs. The MI325X uses PCIe 5.0 x16, while the Arc G3 uses an IGP bus interface.

Head-to-Head Benchmarks

The recorded data shows no direct head-to-head benchmark results between the AMD Instinct MI325X and the Intel Arc G3. Both products have zero benchmark scores and zero wins in the database. This means a direct performance comparison must be inferred from their architectural specifications and theoretical compute metrics.

In raw FP32 compute, the MI325X delivers 81.72 TFLOPS, while the Arc G3 delivers 6.144 TFLOPS. This gives the MI325X a 13.3 times advantage in single-precision floating-point performance. For FP16, the MI325X also delivers 81.72 TFLOPS with a 1:1 ratio, while the Arc G3 delivers 12.29 TFLOPS with a 2:1 ratio. The MI325X leads FP16 by 6.7 times.

Texture rate shows a similar gap. The MI325X achieves 2,553.6 GTexel/s, while the Arc G3 achieves 96.00 GTexel/s, a 26.6 times difference. Pixel rate is where the Arc G3 holds an advantage: it delivers 48.00 GPixel/s, while the MI325X reports 0 MPixel/s. This is expected, as the MI325X has no ROPs and is not designed for pixel output.

Both products are at the 50th percentile versus all GPUs in the database, but this is a preliminary figure given that no benchmark scores are recorded for either. The average benchmark score for both is 0, meaning the percentile ranking is based on specification data rather than actual test results.

The memory bandwidth comparison is decisive. The MI325X's 6.14 TB/s is a fixed specification, while the Arc G3's bandwidth is System Dependent. In a system with standard DDR5 memory, the Arc G3 would deliver bandwidth measured in tens of GB/s, making the MI325X's bandwidth advantage nearly two orders of magnitude.

Specification Differences

The following table summarizes the key specification differences between the AMD Instinct MI325X and the Intel Arc G3:

| Specification | AMD Instinct MI325X | Intel Arc G3 |

|---|---|---|

| Architecture | CDNA 3.0 | Xe3-LPG |

| Process Node | 5 nm | 3 nm |

| Foundry | TSMC | Intel |

| Transistors | 153,000 million | unknown |

| Die Size | 1017 mm² | unknown |

| Base Clock | 1000 MHz | 300 MHz |

| Boost Clock | 2100 MHz | 2400 MHz |

| Memory Size | 256 GB | System Shared |

| Memory Type | HBM3e | System Shared |

| Memory Bus Width | 8192 bit | System Shared |

| Memory Bandwidth | 6.14 TB/s | System Dependent |

| Shading Units | 19,456 | 1,280 |

| TMUs | 1,216 | 40 |

| ROPs | 0 | 20 |

| Ray Tracing Cores | N/A | 10 |

| Pixel Rate | 0 MPixel/s | 48.00 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 96.00 GTexel/s |

| FP32 | 81.72 TFLOPS | 6.144 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 12.29 TFLOPS (2:1) |

| TDP | 1000 W | 25 W |

| Slot Width | OAM Module | IGP |

| Bus Interface | PCIe 5.0 x16 | IGP |

| Display Outputs | No outputs | Portable Device Dependent |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Release Date | 2024-10-09 | 2026-05-31 |

| Production Status | Not specified | Active |

Where Each One Wins

The AMD Instinct MI325X dominates in every compute-oriented metric. Its FP32 performance of 81.72 TFLOPS is 13.3 times higher than the Arc G3's 6.144 TFLOPS. Its FP16 performance of 81.72 TFLOPS is 6.7 times higher than the Arc G3's 12.29 TFLOPS. The texture rate advantage is even more pronounced at 26.6 times.

Memory capacity and bandwidth are overwhelmingly in the MI325X's favor. With 256 GB of HBM3e and 6.14 TB/s bandwidth, it can handle datasets that would be impossible for a System Shared memory configuration. The 8192-bit bus width is designed for massive parallel access, which is critical for AI training and inference workloads.

The MI325X also wins on shading unit count with 19,456 versus 1,280, and on TMUs with 1,216 versus 40. These specifications point to a GPU built for throughput, not interactive rendering.

The Intel Arc G3 wins in several specific areas. Its 48.00 GPixel/s pixel rate is infinitely higher than the MI325X's 0 MPixel/s, confirming that the Arc G3 can actually output frames while the MI325X cannot. The Arc G3 also supports modern graphics APIs including DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI325X reports N/A for all three.

Power efficiency is another clear win for the Arc G3. Its 25 W TDP versus the MI325X's 1000 W means the Arc G3 uses 40 times less power. This makes the Arc G3 suitable for portable devices, while the MI325X requires a 1400 W suggested power supply.

The Arc G3 also has ray tracing cores, with 10 dedicated units, while the MI325X has none. For workloads that require ray tracing, the Arc G3 is the only option between the two.

The Verdict

The data presents two GPUs with almost no overlap in purpose. The AMD Instinct MI325X is a compute accelerator designed for massive parallel processing, while the Intel Arc G3 is an integrated graphics solution for portable devices.

For AI training, scientific simulation, or any workload requiring massive memory bandwidth and FP32 throughput, the MI325X is the clear choice. Its 6.14 TB/s bandwidth and 256 GB capacity are unmatched by the Arc G3's System Dependent memory. The 81.72 TFLOPS FP32 performance provides 13.3 times the compute throughput of the Arc G3.

For interactive graphics, gaming, or any workload requiring a display output, the Arc G3 is the only viable option. The MI325X has no display outputs and reports N/A for graphics APIs. The Arc G3 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and has a pixel rate of 48.00 GPixel/s. Its 10 ray tracing cores provide hardware acceleration that the MI325X completely lacks.

Power requirements reinforce this split. The MI325X's 1000 W TDP and 1400 W suggested power supply make it a data center component. The Arc G3's 25 W TDP makes it suitable for integration into mobile processors, which aligns with its IGP form factor and Panther Lake chip designation.

The release dates also indicate different market timing. The MI325X arrived in October 2024, while the Arc G3 is scheduled for May 2026. The Arc G3 is a forward-looking product for next-generation mobile platforms, while the MI325X is an immediate compute solution.

The database shows both products at the 50th percentile versus all GPUs, but this reflects missing benchmark data rather than equivalent performance. The specification differences are so large that any direct comparison is misleading. These are complementary products serving different segments, and the data confirms that neither can substitute for the other.