AMD Instinct MI355X vs AMD Radeon RX 7600S Comparison

Where Each One Wins

The AMD Instinct MI355X and AMD Radeon RX 7600S occupy entirely separate performance domains. The MI355X is an accelerator-class compute product with no display outputs, zero rasterization capability, and a 1400 W power envelope. The RX 7600S is a mobile graphics processor with 75 W TDP, full DirectX 12 Ultimate support, and portable-device-dependent display outputs. The database records no head-to-head benchmark wins for either part, because no common test suite can run on both: the MI355X has no benchmark entries, while the RX 7600S has ten recorded scores across 3DMark, Geekbench, and Passmark suites.

The RX 7600S wins in every measurable graphics workload where it has data. Its Passmark G3D score of 15408 places it in the 60th percentile among all GPUs in the database, with an average benchmark score of 16696 across all tests. The MI355X sits at the 50th percentile with an average score of zero, reflecting the absence of any recorded graphics benchmarks. For texture-heavy workloads, the MI355X delivers a texture rate of 2,457.6 GTexel/s versus 246.4 GTexel/s for the RX 7600S, but that advantage is theoretical since the MI355X cannot output pixels (0 MPixel/s pixel rate) and lacks any graphics API support.

The architectural split is clear: the MI355X targets compute acceleration with 78.64 TFLOPS FP32 and 78.64 TFLOPS FP16 (1:1 ratio), while the RX 7600S targets rendering with 15.77 TFLOPS FP32 and 31.54 TFLOPS FP16 (2:1 ratio). The RX 7600S has 28 ray tracing cores and 64 ROPs; the MI355X has no listed RT cores and zero ROPs. For any workload requiring visual output, the RX 7600S is the only functional choice. For pure compute density, the MI355X's 16384 shading units versus 1792 on the RX 7600S indicate a massive parallel throughput advantage, though no direct benchmark comparison exists in the database.

Architecture Differences

The two processors represent different architecture families from AMD. The MI355X uses CDNA 4.0 architecture on the MI350 256CU chip, fabricated on TSMC's 3 nm process. The RX 7600S uses RDNA 3.0 architecture on the Navi 33 chip, codenamed Hotpink Bonefish, fabricated on TSMC's 6 nm process. The MI355X belongs to the Instinct (MIx) generation with predecessor Radeon Instinct, while the RX 7600S belongs to the Navi Mobile (RX 7000M) generation with predecessor Polaris Mobile.

Transistor counts differ by an order of magnitude. The MI355X packs 185,000 million transistors on a 2380 mm² die, yielding a transistor density of 77.7M per mm². The RX 7600S has 13,300 million transistors on a 204 mm² die, with a density of 65.2M per mm². The MI355X's larger die and higher density reflect its compute-oriented design, while the RX 7600S's smaller die suits mobile integration.

Memory subsystems are fundamentally different. The MI355X uses 288 GB of HBM3e on an 8192-bit bus, delivering 8.19 TB/s of bandwidth. The RX 7600S uses 8 GB of GDDR6 on a 128-bit bus, delivering 256.0 GB/s. Both run memory at 2000 MHz, but the MI355X has 8 Gbps effective data rate versus 16 Gbps effective for the RX 7600S. The MI355X's memory bandwidth is 32 times higher, a critical advantage for large compute workloads.

Clock behavior also diverges. The MI355X has a base clock of 1000 MHz and boost of 2400 MHz. The RX 7600S has a higher base clock of 1500 MHz, a lower boost of 2200 MHz, and a game clock of 1865 MHz. The RX 7600S supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI355X lists N/A for all graphics APIs, reinforcing its non-rendering role. Power delivery differs starkly: the MI355X requires a suggested 1800 W power supply with a 1400 W TDP, while the RX 7600S has a 75 W TDP and no suggested PSU listed. The MI355X mounts as an OAM Module with PCIe 5.0 x16; the RX 7600S is an IGP with PCIe 4.0 x16.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries between the MI355X and RX 7600S. The MI355X has zero recorded benchmarks, while the RX 7600S has ten. Direct score comparisons are therefore impossible. However, the RX 7600S's recorded scores provide context for its position relative to other GPUs, which indirectly frames the MI355X's absence.

The RX 7600S achieves a 3DMark Steel Nomad DX12 score of 1888. In Geekbench, it scores 68012 in OpenCL and 73868 in Vulkan. Passmark results include 15408 in G3D, 776 in G2D, 6520 in GPU compute, 211 in DirectX 9, 140 in DirectX 11, 74 in DirectX 10, and 65 in DirectX 12. Its average benchmark score of 16696 places it at the 60th percentile. The nearest rivals in the database are the NVIDIA T400 4 GB with an average score of 16792 (0.6% higher), the NVIDIA T400 with 16508 (1.1% lower), the NVIDIA GeForce RTX 5090 D V2 with 16504 (1.2% lower), and the NVIDIA Tesla M4 with 16932 (1.4% higher). These deltas show the RX 7600S sits within a tight 2.6% band among these four competing products.

The MI355X, by contrast, has an average benchmark score of zero and sits at the 50th percentile, which in the database's context means it has no measured performance data. The only quantitative comparison available is theoretical peak throughput: the MI355X's FP32 of 78.64 TFLOPS is 4.99 times the RX 7600S's 15.77 TFLOPS. Its FP16 of 78.64 TFLOPS (1:1) is 2.49 times the RX 7600S's 31.54 TFLOPS (2:1). Texture rate comparison shows 2,457.6 GTexel/s versus 246.4 GTexel/s, a 9.97 times gap. Pixel rate is the inverse: the MI355X outputs 0 MPixel/s, while the RX 7600S outputs 140.8 GPixel/s.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI355X delivers 78.64 TFLOPS FP32, which is 4.99 times the RX 7600S's 15.77 TFLOPS.

Q: Can the MI355X render graphics or output to displays?

A: No. The MI355X has 0 MPixel/s pixel rate, zero ROPs, no display outputs, and lists N/A for DirectX, OpenGL, and Vulkan support.

Q: What is the memory bandwidth difference between the two?

A: The MI355X has 8.19 TB/s bandwidth from 288 GB HBM3e on an 8192-bit bus. The RX 7600S has 256.0 GB/s from 8 GB GDDR6 on a 128-bit bus.

Q: How does the RX 7600S compare to its nearest database rivals?

A: The RX 7600S averages 16696 across benchmarks. It sits 0.6% below the NVIDIA T400 4 GB (16792), 1.1% above the NVIDIA T400 (16508), 1.2% above the NVIDIA GeForce RTX 5090 D V2 (16504), and 1.4% below the NVIDIA Tesla M4 (16932).

Q: What process nodes do the two GPUs use?

A: The MI355X uses TSMC's 3 nm process. The RX 7600S uses TSMC's 6 nm process.

Q: Do both GPUs support ray tracing?

A: The RX 7600S has 28 ray tracing cores. The MI355X has no ray tracing cores listed in the database.

The Verdict

The data supports a strict separation of roles. The AMD Instinct MI355X is a compute accelerator with no graphics capability: zero ROPs, no display outputs, no graphics API support, and no recorded benchmarks. Its strengths are purely theoretical peak numbers: 78.64 TFLOPS FP32, 8.19 TB/s memory bandwidth, and 16384 shading units on a 2380 mm² die. Anyone needing rasterization, ray tracing, or any visual output must choose the RX 7600S, which delivers 140.8 GPixel/s, 28 RT cores, and full DirectX 12 Ultimate support.

The RX 7600S's measured performance places it at the 60th percentile, with an average benchmark score of 16696. Its nearest rivals are all within 1.4% delta, indicating a tightly competitive mid-range mobile segment. The MI355X's 50th percentile with zero average score reflects its absence from standard graphics benchmarks, not a performance judgment. For compute workloads requiring massive memory capacity and bandwidth, the MI355X's 288 GB HBM3e and 8192-bit bus are unmatched in the database. For mobile graphics, the RX 7600S's 75 W TDP and IGP form factor are designed for portable systems.

Neither product substitutes for the other. The MI355X requires a 1400 W power envelope and an OAM Module slot, making it a data-center or server component. The RX 7600S is an IGP with portable-device-dependent outputs, suited to laptops. The production status differs: the RX 7600S is Active, while the MI355X's status is not recorded. Release dates also differ: the RX 7600S launched on 2023-01-03, the MI355X on 2025-06-11.

Specification Differences

| Specification | AMD Instinct MI355X | AMD Radeon RX 7600S |

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

| Architecture | CDNA 4.0 | RDNA 3.0 |

| Chip | MI350 256CU | Navi 33 |

| Process Node | 3 nm | 6 nm |

| Transistors | 185,000 million | 13,300 million |

| Die Size | 2380 mm² | 204 mm² |

| Transistor Density | 77.7M / mm² | 65.2M / mm² |

| Base Clock | 1000 MHz | 1500 MHz |

| Boost Clock | 2400 MHz | 2200 MHz |

| Memory Size | 288 GB | 8 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus Width | 8192 bit | 128 bit |

| Memory Bandwidth | 8.19 TB/s | 256.0 GB/s |

| Shading Units | 16384 | 1792 |

| TMUs | 1024 | 112 |

| ROPs | 0 | 64 |

| Ray Tracing Cores | None listed | 28 |

| Pixel Rate | 0 MPixel/s | 140.8 GPixel/s |

| Texture Rate | 2,457.6 GTexel/s | 246.4 GTexel/s |

| FP32 | 78.64 TFLOPS | 15.77 TFLOPS |

| FP16 | 78.64 TFLOPS (1:1) | 31.54 TFLOPS (2:1) |

| TDP | 1400 W | 75 W |

| Slot Width | OAM Module | IGP |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x16 |

| 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 | 2025-06-11 | 2023-01-03 |

| Predecessor | Radeon Instinct | Polaris Mobile |

| Production Status | Not recorded | Active |