AMD Instinct MI355X vs NVIDIA GeForce RTX 5070 SUPER Comparison

FAQ

Q: What are the two products compared here?

A: The AMD Instinct MI355X is an accelerator built on CDNA 4.0 architecture, part of the Instinct (MIx) generation, while the NVIDIA GeForce RTX 5070 SUPER is a GeForce 50-series graphics card using Blackwell 2.0 architecture.

Q: Which product has a higher transistor count?

A: The AMD Instinct MI355X packs 185,000 million transistors on a 2380 mm² die, versus 31,100 million transistors on the RTX 5070 SUPER's 263 mm² die. The MI355X has roughly 5.9 times more transistors, though the RTX 5070 SUPER achieves a higher transistor density at 118.3M per mm² compared to 77.7M per mm².

Q: How do the memory systems compare?

A: The MI355X uses 288 GB of HBM3e memory with an 8192-bit bus and 8.19 TB/s bandwidth. The RTX 5070 SUPER has 18 GB of GDDR7 memory on a 192-bit bus with 672.0 GB/s bandwidth. The MI355X provides 16 times the memory capacity and over 12 times the bandwidth.

Q: What is the FP32 compute difference?

A: The MI355X delivers 78.64 TFLOPS of FP32 performance, while the RTX 5070 SUPER delivers 32.15 TFLOPS. The MI355X is approximately 2.4 times faster in raw single-precision floating-point throughput.

Q: Which card supports display outputs?

A: Only the RTX 5070 SUPER has display outputs, offering 1x HDMI 2.1b and 3x DisplayPort 2.1b. The MI355X has no display outputs at all, reflecting its accelerator role.

Q: What does the benchmark data show for the RTX 5070 SUPER?

A: The RTX 5070 SUPER scores 2690 in the 3DMark Steel Nomad DX12 test, placing it in the 18th percentile among all GPUs. Its nearest rivals, the NVIDIA Quadro K1100M and GeForce GT 1030, score 2664 and 2662, respectively, with the RTX 5070 SUPER leading them by 1% and 1.1%.

Architecture Differences

The AMD Instinct MI355X and NVIDIA GeForce RTX 5070 SUPER represent fundamentally different design philosophies. The MI355X uses AMD's CDNA 4.0 architecture, built specifically for compute acceleration, while the RTX 5070 SUPER uses NVIDIA's Blackwell 2.0 architecture, designed for graphics and gaming workloads.

Manufacturing processes differ significantly. The MI355X is fabricated on TSMC's 3 nm node, whereas the RTX 5070 SUPER uses a 5 nm process. Despite the smaller node, the MI355X's die measures 2380 mm², nearly nine times larger than the RTX 5070 SUPER's 263 mm² die. The transistor density tells a different story: the RTX 5070 SUPER achieves 118.3M transistors per mm² versus 77.7M for the MI355X, indicating tighter packing on the smaller NVIDIA die.

Compute resources diverge sharply. The MI355X contains 16384 shading units, 1024 texture mapping units, and zero ROPs, consistent with its lack of display output. The RTX 5070 SUPER has 6400 shading units, 200 TMUs, and 80 ROPs. The MI355X also carries dedicated ray tracing cores and tensor cores on the NVIDIA side: 50 RT cores and 200 tensor cores, while the AMD part lists none.

Clock behavior reflects their purposes. The MI355X runs at a 1000 MHz base clock boosting to 2400 MHz, while the RTX 5070 SUPER starts at 2325 MHz base and boosts to 2512 MHz. The NVIDIA card operates at higher clocks throughout, but the AMD accelerator compensates with massive parallel width.

Memory architectures are entirely different classes. The MI355X uses HBM3e with 288 GB capacity, an 8192-bit bus, and 8.19 TB/s bandwidth. The RTX 5070 SUPER uses GDDR7 with 18 GB capacity, a 192-bit bus, and 672.0 GB/s bandwidth. The HBM3e implementation prioritizes bandwidth and capacity for data-center workloads, while GDDR7 balances cost and speed for consumer graphics.

Power requirements highlight the gap: the MI355X has a 1400 W TDP and suggests an 1800 W PSU, while the RTX 5070 SUPER draws 275 W. The MI355X comes as an OAM Module with no power connectors, while the RTX 5070 SUPER is a dual-slot card with a single 16-pin connector.

API support differs completely. The MI355X reports N/A for DirectX, OpenGL, and Vulkan, while the RTX 5070 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD card is not designed for graphics APIs at all.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the AMD Instinct MI355X and NVIDIA GeForce RTX 5070 SUPER. The MI355X has a benchmark score of zero and an empty benchmarks array, meaning no recorded measurements exist for it. The RTX 5070 SUPER has one recorded benchmark: 2690 in 3DMark Steel Nomad DX12.

The MI355X sits at the 50th percentile among all GPUs with an average benchmark score of zero, while the RTX 5070 SUPER ranks at the 18th percentile with an average score of 2690. This comparison is limited by missing data for the AMD part, so direct performance conclusions cannot be drawn from benchmark measurements.

The RTX 5070 SUPER's nearest rivals provide context for its single score. The NVIDIA Quadro K1100M averages 2664, just 1% behind. The GeForce GT 1030 averages 2662, 1.1% behind. The Intel Arc Pro B50 averages 2660, also 1.1% behind. The GeForce GT 440 averages 2645, trailing by 1.7%. These deltas are small, indicating the RTX 5070 SUPER's benchmark placement is tightly clustered with older or lower-tier parts in this specific test.

Specification comparisons offer the only meaningful head-to-head analysis. In FP32 compute, the MI355X's 78.64 TFLOPS more than doubles the RTX 5070 SUPER's 32.15 TFLOPS. Texture rate follows a similar pattern: 2,457.6 GTexel/s for the MI355X versus 502.4 GTexel/s for the RTX 5070 SUPER, a factor of roughly 4.9. Pixel rate shows the opposite: the MI355X produces 0 MPixel/s, while the RTX 5070 SUPER manages 201.0 GPixel/s.

Memory bandwidth favors the MI355X overwhelmingly: 8.19 TB/s versus 672.0 GB/s, a 12.2 times advantage. Memory capacity favors the AMD part by 16 times: 288 GB versus 18 GB. These differences reflect the MI355X's role as a compute accelerator where memory-bound workloads dominate.

The Verdict

The data presents a clear functional split. The AMD Instinct MI355X is a compute accelerator with no display outputs, no graphics API support, and specifications tuned for massive parallel throughput. The NVIDIA GeForce RTX 5070 SUPER is a consumer graphics card with display connectivity, full DirectX 12 Ultimate support, and a conventional rendering pipeline.

For compute-intensive workloads such as large-scale AI training or scientific simulation, the MI355X offers 2.4 times the FP32 throughput, 12.2 times the memory bandwidth, and 16 times the memory capacity compared to the RTX 5070 SUPER. Its 1400 W TDP and OAM Module form factor indicate a data-center deployment scenario.

For gaming or graphics rendering, the RTX 5070 SUPER is the only viable option between the two. It has ROPs, ray tracing cores, tensor cores, display outputs, and API compatibility. The MI355X cannot render to a screen at all, with zero pixel rate and no display outputs.

The benchmark data only covers the RTX 5070 SUPER, scoring 2690 in 3DMark Steel Nomad DX12 and placing at the 18th percentile. The MI355X has no recorded benchmark scores, so its real-world performance cannot be verified from the database. The 50th percentile ranking for the MI355X appears without supporting benchmark numbers.

Specification Differences

| Specification | AMD Instinct MI355X | NVIDIA GeForce RTX 5070 SUPER |

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

| Architecture | CDNA 4.0 | Blackwell 2.0 |

| Process node | 3 nm | 5 nm |

| Transistors | 185,000 million | 31,100 million |

| Die size | 2380 mm² | 263 mm² |

| Transistor density | 77.7M / mm² | 118.3M / mm² |

| Base clock | 1000 MHz | 2325 MHz |

| Boost clock | 2400 MHz | 2512 MHz |

| Memory clock | 2000 MHz, 8 Gbps effective | 1750 MHz, 28 Gbps effective |

| Memory size | 288 GB | 18 GB |

| Memory type | HBM3e | GDDR7 |

| Memory bus | 8192 bit | 192 bit |

| Memory bandwidth | 8.19 TB/s | 672.0 GB/s |

| Shading units | 16384 | 6400 |

| TMUs | 1024 | 200 |

| ROPs | 0 | 80 |

| RT cores | None | 50 |

| Tensor cores | None | 200 |

| Pixel rate | 0 MPixel/s | 201.0 GPixel/s |

| Texture rate | 2,457.6 GTexel/s | 502.4 GTexel/s |

| FP32 | 78.64 TFLOPS | 32.15 TFLOPS |

| FP16 | 78.64 TFLOPS (1:1) | 32.15 TFLOPS (1:1) |

| TDP | 1400 W | 275 W |

| Slot width | OAM Module | Dual-slot |

| Power connectors | None | 1x 16-pin |

| Suggested PSU | 1800 W | None |

| Display outputs | No outputs | 1x HDMI 2.1b, 3x DisplayPort 2.1b |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | 102 mm x 165 mm | 245 mm x 115 mm x 40 mm |

| Release date | 2025-06-11 | 2025-12-31 |

| Production status | Not specified | Active |

Where Each One Wins

The AMD Instinct MI355X wins decisively in raw compute throughput. Its FP32 output of 78.64 TFLOPS and FP16 output of 78.64 TFLOPS (1:1 ratio) provide 2.4 times the arithmetic capability of the RTX 5070 SUPER. Texture processing also favors the AMD part at 2,457.6 GTexel/s, nearly 4.9 times the NVIDIA card's 502.4 GTexel/s. Memory bandwidth is the largest gap: 8.19 TB/s versus 672.0 GB/s gives the MI355X a 12.2 times advantage, which directly benefits memory-bound workloads such as large matrix operations or massive dataset processing. The 288 GB capacity compared to 18 GB means the MI355X can hold substantially larger models or datasets in memory without external swapping.

The NVIDIA GeForce RTX 5070 SUPER wins in every graphics-specific category. It produces 201.0 GPixel/s of pixel throughput while the MI355X produces zero. It has 80 ROPs, 50 RT cores, and 200 tensor cores, features entirely absent from the AMD accelerator. Display connectivity is exclusive to the NVIDIA card with 1x HDMI 2.1b and 3x DisplayPort 2.1b outputs. API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 enables standard graphics software, whereas the MI355X supports none of these. The RTX 5070 SUPER also runs at higher clocks, 2325 MHz base and 2512 MHz boost versus 1000 MHz and 2400 MHz, and consumes 275 W compared to 1400 W, making it suitable for conventional desktop installations.

The RTX 5070 SUPER has recorded benchmark data, scoring 2690 in 3DMark Steel Nomad DX12 with an 18th percentile placement. The MI355X has no benchmark scores in the database, so its percentile ranking of 50th cannot be validated against actual measurements. The RTX 5070 SUPER's nearest rivals, all within 1.7% of its score, suggest its benchmark position is stable but unremarkable. The MI355X's lack of data means its compute advantages are purely specification-based, not empirically confirmed through standardized testing.