AMD Instinct MI355X vs NVIDIA GeForce RTX 4070 Ti Comparison

Head-to-Head Benchmarks

The comparison between the AMD Instinct MI355X and the NVIDIA GeForce RTX 4070 Ti is not a conventional contest. The database contains no head-to-head benchmark entries for these two accelerators, and the AMD part carries no recorded benchmark scores. The RTX 4070 Ti, by contrast, has an extensive benchmark profile. Its average benchmark score across all recorded tests is 44,795, placing it in the 84th percentile of all GPUs in the database.

The RTX 4070 Ti shows its strongest results in compute-oriented workloads. Its Geekbench OpenCL score reaches 176,953, while its Geekbench Vulkan score is even higher at 213,808. In Passmark testing, the GPU posts a G3D score of 31,624 and a GPU compute score of 18,396. The DirectX 9 score of 352 is the highest among the Passmark DirectX tests, with DirectX 11 at 288, DirectX 10 at 187, and DirectX 12 at 116. The G2D score sits at 1,200. In the 3DMark Steel Nomad DX12 test, the card records a score of 5,024.

The Instinct MI355X has no comparable scores in the database. Its average benchmark score is 0, and it sits at the 50th percentile by default. This does not indicate parity with the RTX 4070 Ti; rather, it reflects the absence of recorded measurements. The data simply shows no benchmark results for the AMD accelerator.

When examining the RTX 4070 Ti against its nearest recorded rivals, the margins are tight. The NVIDIA GeForce RTX 5090 Mobile scores 45,152, which is 0.8% higher than the 4070 Ti. The AMD Radeon Pro 5500 XT scores 45,384, 1.3% higher. The Intel Arc A730M scores 45,592, 1.7% higher. The NVIDIA RTX A6000 scores 44,075, which is 1.6% lower than the 4070 Ti. These figures show the 4070 Ti performing within a narrow band of roughly 2% of its closest competitors in the database.

The absence of benchmark data for the MI355X means no direct numerical comparison can be made. The recorded data indicates the RTX 4070 Ti is a measured performer with a substantial benchmark history, while the MI355X is an unmeasured entity in this database.

Architecture Differences

The architectural divide between these two parts is fundamental. The AMD Instinct MI355X uses the CDNA 4.0 architecture on a 3 nm process at TSMC. The chip, designated MI350 256CU, packs 185,000 million transistors onto a die size of 2,380 mm². The transistor density is 77.7 million per mm². The NVIDIA GeForce RTX 4070 Ti uses the Ada Lovelace architecture on a 5 nm process, also from TSMC. Its AD104 chip contains 35,800 million transistors on a 294 mm² die, for a density of 121.8 million per mm². The MI355X has far more transistors and a much larger die, but the RTX 4070 Ti achieves higher transistor density.

The MI355X is a compute-oriented accelerator with 16,384 shading units and 1,024 texture mapping units. It has 0 ROPs and no recorded ray tracing or tensor core counts. The RTX 4070 Ti has 7,680 shading units, 240 TMUs, and 80 ROPs. It also includes 60 ray tracing cores and 240 tensor cores. The MI355X has no display outputs, while the RTX 4070 Ti provides 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Memory configurations diverge sharply. The MI355X uses 288 GB of HBM3e on an 8192-bit bus, delivering 8.19 TB/s of bandwidth. The RTX 4070 Ti uses 12 GB of GDDR6X on a 192-bit bus, with 504.2 GB/s of bandwidth. The MI355X memory clock is 2000 MHz with 8 Gbps effective, while the RTX 4070 Ti memory clock is 1313 MHz with 21 Gbps effective.

The clock speeds also differ. The MI355X has a base clock of 1000 MHz and a boost clock of 2400 MHz. The RTX 4070 Ti has a base clock of 2310 MHz and a boost clock of 2610 MHz. The RTX 4070 Ti runs at higher clock frequencies, but the MI355X compensates with far more shader units.

Compute throughput figures favor the MI355X in raw terms. The AMD part delivers 78.64 TFLOPS in FP32 and 78.64 TFLOPS in FP16 at a 1:1 ratio. The RTX 4070 Ti delivers 40.09 TFLOPS in FP32 and 40.09 TFLOPS in FP16 at a 1:1 ratio. The MI355X texture rate is 2,457.6 GTexel/s, versus 626.4 GTexel/s for the RTX 4070 Ti. The MI355X pixel rate is 0 MPixel/s, while the RTX 4070 Ti reaches 208.8 GPixel/s.

The power envelopes are entirely different. The MI355X is rated at 1400 W TDP with a suggested PSU of 1800 W. The RTX 4070 Ti is rated at 285 W TDP with a suggested PSU of 600 W. The MI355X uses an OAM module form factor with no power connectors, while the RTX 4070 Ti is a dual-slot card with a single 16-pin connector.

The bus interfaces differ as well. The MI355X uses PCIe 5.0 x16, while the RTX 4070 Ti uses PCIe 4.0 x16. API support is also distinct. The MI355X lists no DirectX, OpenGL, or Vulkan support. The RTX 4070 Ti supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Physical dimensions reflect different design goals. The MI355X measures 102 mm in length and 165 mm in width. The RTX 4070 Ti measures 285 mm in length, 112 mm in height, and 42 mm in width.

FAQ

Q: Which GPU has more shading units?

A: The AMD Instinct MI355X has 16,384 shading units, which is more than double the 7,680 shading units on the NVIDIA GeForce RTX 4070 Ti.

Q: What are the FP32 compute figures for each card?

A: The MI355X delivers 78.64 TFLOPS in FP32, while the RTX 4070 Ti delivers 40.09 TFLOPS in FP32. Both maintain a 1:1 FP16 ratio.

Q: How do the memory configurations compare?

A: The MI355X uses 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth. The RTX 4070 Ti uses 12 GB of GDDR6X on a 192-bit bus with 504.2 GB/s bandwidth.

Q: Does the MI355X support ray tracing?

A: The database records no ray tracing cores for the MI355X. The RTX 4070 Ti has 60 ray tracing cores and 240 tensor cores.

Q: Which card has display outputs?

A: The MI355X has no display outputs. The RTX 4070 Ti has 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Q: What is the power requirement difference?

A: The MI355X has a TDP of 1400 W with a suggested PSU of 1800 W. The RTX 4070 Ti has a TDP of 285 W with a suggested PSU of 600 W.

The Verdict

The data indicates two accelerators built for entirely different purposes. The AMD Instinct MI355X is an OAM module with no display outputs, no recorded API support, and a 1400 W TDP. It targets massive compute workloads with 288 GB of HBM3e memory and 78.64 TFLOPS of FP32 throughput. Its 2380 mm² die and 185,000 million transistors reflect a scale designed for server and datacenter deployment.

The NVIDIA GeForce RTX 4070 Ti is a consumer graphics card. It has a dual-slot form factor, display outputs, full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support. Its 285 W TDP and 600 W suggested PSU make it suitable for standard desktop power delivery. The 84th percentile ranking and average benchmark score of 44,795 confirm it as a measured performer in the database.

For users requiring display output, standard PCIe 4.0 compatibility, and established benchmark results, the RTX 4070 Ti is the only option with recorded data. For users requiring the massive memory capacity, memory bandwidth, and raw FP32 compute of the MI355X, the AMD part is the clear choice based on its specifications. The absence of benchmark scores for the MI355X means performance claims must rest on its architectural specifications alone.

The RTX 4070 Ti has a production status of end-of-life, with the GeForce 50 series as its successor. The MI355X has no recorded production status, but its release date of June 11, 2025 is later than the January 2, 2023 release date of the RTX 4070 Ti. The launch MSRP for the RTX 4070 Ti is 799 USD.

Specification Differences

| Specification | AMD Instinct MI355X | NVIDIA GeForce RTX 4070 Ti |

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

| Architecture | CDNA 4.0 | Ada Lovelace |

| Process Node | 3 nm | 5 nm |

| Transistors | 185,000 million | 35,800 million |

| Die Size | 2380 mm² | 294 mm² |

| Transistor Density | 77.7M / mm² | 121.8M / mm² |

| Base Clock | 1000 MHz | 2310 MHz |

| Boost Clock | 2400 MHz | 2610 MHz |

| Memory Size | 288 GB | 12 GB |

| Memory Type | HBM3e | GDDR6X |

| Memory Bus Width | 8192 bit | 192 bit |

| Memory Bandwidth | 8.19 TB/s | 504.2 GB/s |

| Shading Units | 16384 | 7680 |

| TMUs | 1024 | 240 |

| ROPs | 0 | 80 |

| Ray Tracing Cores | None recorded | 60 |

| Tensor Cores | None recorded | 240 |

| Pixel Rate | 0 MPixel/s | 208.8 GPixel/s |

| Texture Rate | 2,457.6 GTexel/s | 626.4 GTexel/s |

| FP32 | 78.64 TFLOPS | 40.09 TFLOPS |

| FP16 | 78.64 TFLOPS (1:1) | 40.09 TFLOPS (1:1) |

| TDP | 1400 W | 285 W |

| Slot Width | OAM Module | Dual-slot |

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

| Suggested PSU | 1800 W | 600 W |

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

| Display Outputs | No outputs | 1x HDMI 2.1, 3x DisplayPort 1.4a |

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

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Length | 102 mm | 285 mm |

| Width | 165 mm | 42 mm |

| Height | Not recorded | 112 mm |

| Release Date | 2025-06-11 | 2023-01-02 |

| Production Status | Not recorded | End-of-life |

| Launch MSRP | None recorded | 799 USD |