AMD Instinct MI355X vs AMD Radeon RX 7700 XT Comparison

Head-to-Head Benchmarks

The database contains no shared benchmark results between the AMD Instinct MI355X and the AMD Radeon RX 7700 XT. The MI355X has an empty benchmark array, meaning no recorded scores exist for any DirectX, OpenCL, Vulkan, or compute workloads. The RX 7700 XT, by contrast, has ten recorded entries across Passmark, Geekbench, and 3DMark suites.

Without head-to-head measurements, direct score comparisons are impossible. What the data does show is the RX 7700 XT's position within its own peer group. Its average benchmark score of 22549 places it in the 67th percentile of all GPUs in the database. Its nearest rivals are all within a narrow band: the NVIDIA GeForce RTX 5060 Mobile scores 22435, a 0.5% positive delta for the RX 7700 XT; the RTX 4060 Mobile scores 22729, a 0.8% deficit; the RTX 2080 scores 22895, a 1.5% deficit; and the AMD Radeon RX 5700 scores 22170, a 1.7% advantage for the RX 7700 XT.

The MI355X carries a 50th percentile rating with an average benchmark score of zero, reflecting the absence of any recorded workload data. This is not a performance verdict; it is a data availability gap. The two cards target entirely different computing environments, and the benchmark suite used for consumer GPUs does not appear to have any entries for the Instinct accelerator.

Examining the RX 7700 XT's individual scores reveals its mixed workload profile. In Passmark G3D, it records 22547, nearly matching its overall average. Passmark GPU Compute shows 12912, roughly 57% of the G3D figure. Geekbench OpenCL delivers 138383, while Geekbench Vulkan drops to 46443. The 3DMark Steel Nomad DX12 score is 3316. Passmark legacy tests show lower scores: DirectX 9 at 294, DirectX 11 at 232, DirectX 10 at 119, and DirectX 12 at 79. The G2D score of 1161 highlights that 2D workloads are not this card's strength.

These numbers indicate the RX 7700 XT performs best in modern 3D rendering and general compute, with older API tests showing diminishing returns. The MI355X's lack of any benchmark entries means the database cannot confirm or refute its expected compute dominance. Any comparison must therefore rely on architectural and specification differences rather than measured outcomes.

Architecture Differences

The two AMD GPUs share a manufacturer but diverge fundamentally in design philosophy. The MI355X uses the CDNA 4.0 architecture, built for data center acceleration, while the RX 7700 XT uses RDNA 3.0, optimized for client graphics. This distinction shapes every specification difference.

The manufacturing process differs: the MI355X is fabricated on a 3 nm node at TSMC, whereas the RX 7700 XT uses a 5 nm node, also at TSMC. Transistor counts reflect the scale gap. The MI355X packs 185,000 million transistors across a 2380 mm² die, yielding a density of 77.7 million transistors per square millimeter. The RX 7700 XT contains 28,100 million transistors on a 346 mm² die, with a higher density of 81.2 million per square millimeter. The MI355X's die is nearly seven times larger in area but slightly less dense, indicating a design prioritizing raw scale over packing efficiency.

Compute resources differ dramatically. The MI355X has 16,384 shading units and 1,024 texture mapping units, but reports zero ROPs and a pixel rate of 0 MPixel/s. Its texture rate is 2,457.6 GTexel/s. The RX 7700 XT has 3,456 shading units, 216 TMUs, and 96 ROPs, with a pixel rate of 244.2 GPixel/s and texture rate of 549.5 GTexel/s. The shading unit count favors the MI355X by a factor of 4.7, but the absence of ROPs confirms it is not designed for rasterized display output.

Floating-point throughput follows the same pattern. The MI355X delivers 78.64 TFLOPS for both FP32 and FP16, with a 1:1 ratio. The RX 7700 XT delivers 35.17 TFLOPS for both formats, also at 1:1. The MI355X provides 2.24 times the FP32 compute of the RX 7700 XT, though the RX 7700 XT's ray tracing cores (54 of them) give it capabilities the MI355X lacks entirely, as the Instinct card reports no RT core count.

Memory architecture is where the two diverge most sharply. The MI355X uses 288 GB of HBM3e on an 8192-bit bus, achieving 8.19 TB/s of bandwidth. The RX 7700 XT uses 12 GB of GDDR6 on a 192-bit bus, achieving 432.0 GB/s. The MI355X's bandwidth is roughly 19 times higher, a necessity for data center workloads. Clock speeds tell a different story: the MI355X runs at a 1000 MHz base and 2400 MHz boost, while the RX 7700 XT runs at 1435 MHz base and 2544 MHz boost, with a game clock of 2171 MHz. The RX 7700 XT has higher clocks, but the MI355X compensates with vastly more compute units and memory bandwidth.

The MI355X uses a 1400 W TDP with an 1800 W suggested PSU, while the RX 7700 XT uses 245 W with a 550 W suggested PSU. Power delivery differs: the MI355X has no power connectors and mounts as an OAM Module, whereas the RX 7700 XT is a dual-slot card with two 8-pin connectors. The MI355X offers no display outputs and no DirectX, OpenGL, or Vulkan API support. The RX 7700 XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, with outputs including 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C.

Where Each One Wins

The RX 7700 XT wins in every scenario involving visual output. Its display outputs, API support, and ROP count make it functional for gaming, desktop use, or any task requiring a monitor. Its 96 ROPs and 244.2 GPixel/s pixel rate confirm it can drive rasterized graphics. The 54 RT cores enable ray-traced workloads, a feature the MI355X does not offer. The RX 7700 XT's PCIe 4.0 x16 interface, while older than the MI355X's PCIe 5.0 x16, is sufficient for client workloads.

The MI355X wins in raw compute density and memory capacity. Its 288 GB of HBM3e memory dwarfs the RX 7700 XT's 12 GB, making it suitable for datasets that would exhaust the latter's capacity entirely. The 8.19 TB/s bandwidth enables feeding 16,384 shading units at full throughput, a requirement for large-scale matrix operations. The 78.64 TFLOPS FP32 output is more than double the RX 7700 XT's 35.17 TFLOPS, and the 1:1 FP16 ratio means half-precision workloads run at the same speed, not a reduced rate.

The RX 7700 XT's benchmark scores place it in the 67th percentile of all GPUs, above the MI355X's 50th percentile, but this reflects data availability rather than capability. The RX 7700 XT's nearest rival, the RTX 5060 Mobile, is only 0.5% behind, indicating the card sits in a competitive mid-range segment. The MI355X has no rivals listed in the database, suggesting it occupies a unique niche without direct comparators.

Use-case separation is clear: the RX 7700 XT is a client graphics card for interactive rendering, gaming, and desktop acceleration. The MI355X is an accelerator for server environments where display output is irrelevant, memory capacity is paramount, and power consumption up to 1400 W is acceptable. The RX 7700 XT's smaller size (267 mm length, 135 mm height, 50 mm width) fits standard cases, while the MI355X's OAM Module format (102 mm length, 165 mm width) requires specialized mounting.

The Verdict

The data supports a strict division of roles. The AMD Instinct MI355X and AMD Radeon RX 7700 XT are not competitors; they serve different markets with minimal overlap. The MI355X's architecture, memory subsystem, and compute throughput target data center acceleration. The RX 7700 XT's display outputs, API support, and ray tracing capabilities target client graphics.

For any workload requiring a visible framebuffer, the RX 7700 XT is the only viable choice between the two, as the MI355X has no display outputs and no graphics API support. For any workload requiring more than 12 GB of memory, the MI355X is the only option, as its 288 GB capacity exceeds the RX 7700 XT by a factor of 24. The MI355X's 8.19 TB/s bandwidth and 78.64 TFLOPS FP32 output indicate it is designed for throughput-intensive tasks, though the database lacks measured benchmarks to confirm real-world performance.

The RX 7700 XT's recorded scores show it performs competitively within its peer group, with deltas ranging from 1.7% ahead of the RX 5700 to 1.5% behind the RTX 2080. Its 67th percentile ranking places it above the MI355X's 50th percentile, but this is an artifact of the MI355X having no benchmark entries, not a measured performance difference. The MI355X's zero average score and empty nearest-rivals list mean the database currently provides no evidence of its real-world behavior.

The release dates contextualize the comparison: the RX 7700 XT launched in September 2023, while the MI355X launched in June 2025. The RX 7700 XT is an active product with a predecessor in Navi II and a successor in Navi IV. The MI355X lists Radeon Instinct as its predecessor and has no successor recorded. The MI355X's production status is not listed, while the RX 7700 XT is marked active.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The MI355X delivers 78.64 TFLOPS FP32, while the RX 7700 XT delivers 35.17 TFLOPS, giving the MI355X a 2.24x advantage.

Q: Does the MI355X support display outputs?

A: No, the MI355X lists "No outputs" for display connections and has a pixel rate of 0 MPixel/s. The RX 7700 XT has 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C.

Q: What is the memory capacity difference?

A: The MI355X has 288 GB of HBM3e on an 8192-bit bus, while the RX 7700 XT has 12 GB of GDDR6 on a 192-bit bus. The MI355X also offers 8.19 TB/s bandwidth versus 432.0 GB/s.

Q: How does the RX 7700 XT compare to its nearest rivals in the database?

A: Its average score of 22549 is 0.5% ahead of the RTX 5060 Mobile (22435), 0.8% behind the RTX 4060 Mobile (22729), 1.5% behind the RTX 2080 (22895), and 1.7% ahead of the RX 5700 (22170).

Q: Which GPU has ray tracing cores?

A: Only the RX 7700 XT lists ray tracing cores, with 54 RT cores. The MI355X reports no RT core count.

Q: What are the power requirements for each card?

A: The MI355X has a 1400 W TDP with an 1800 W suggested PSU and uses an OAM Module slot. The RX 7700 XT has a 245 W TDP with a 550 W suggested PSU and uses two 8-pin power connectors.

Specification Differences

| Field | AMD Instinct MI355X | AMD Radeon RX 7700 XT |

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

| Architecture | CDNA 4.0 | RDNA 3.0 |

| Process Node | 3 nm | 5 nm |

| Transistors | 185,000 million | 28,100 million |

| Die Size | 2380 mm² | 346 mm² |

| Transistor Density | 77.7M / mm² | 81.2M / mm² |

| Base Clock | 1000 MHz | 1435 MHz |

| Boost Clock | 2400 MHz | 2544 MHz |

| Game Clock | None | 2171 MHz |

| Memory Size | 288 GB | 12 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus Width | 8192 bit | 192 bit |

| Memory Bandwidth | 8.19 TB/s | 432.0 GB/s |

| Shading Units | 16384 | 3456 |

| TMUs | 1024 | 216 |

| ROPs | 0 | 96 |

| RT Cores | None | 54 |

| Pixel Rate | 0 MPixel/s | 244.2 GPixel/s |

| Texture Rate | 2,457.6 GTexel/s | 549.5 GTexel/s |

| FP32 | 78.64 TFLOPS | 35.17 TFLOPS |

| FP16 | 78.64 TFLOPS (1:1) | 35.17 TFLOPS (1:1) |

| TDP | 1400 W | 245 W |

| Slot Width | OAM Module | Dual-slot |

| Power Connectors | None | 2x 8-pin |

| Suggested PSU | 1800 W | 550 W |

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

| Display Outputs | No outputs | 1x HDMI 2.1a, 2x DisplayPort 2.1, 1x USB Type-C |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Length | 102 mm | 267 mm |

| Width | 165 mm | 50 mm |

| Height | None | 135 mm |

| Release Date | 2025-06-11 | 2023-09-05 |

| Production Status | None | Active |

| Predecessor | Radeon Instinct | Navi II |

| Successor | None | Navi IV |

| Launch MSRP | None | 449 USD |