AMD Instinct MI355X vs NVIDIA GeForce RTX 4070 Comparison

Head-to-Head Benchmarks

The recorded data for these two accelerators is asymmetrical. The AMD Instinct MI355X has no benchmark entries in the database, while the NVIDIA GeForce RTX 4070 has a full suite of recorded results. This makes a direct score-by-score comparison impossible, but the available data still allows for meaningful interpretation of where each part stands.

The RTX 4070 produces an average benchmark score of 37,648 across its recorded tests. Its best individual result comes from the Vulkan compute workload, where it scores 174,152, followed closely by the OpenCL result at 154,858. The lower-level synthetic graphics tests show a different picture: the DirectX 9 test returns 320, DirectX 10 returns 139, DirectX 11 returns 244, and DirectX 12 returns 103. The Passmark G3D score reaches 26,927, while the G2D score is 1,164. GPU compute in Passmark lands at 14,720.

The MI355X has no benchmark scores recorded, so its percentile ranking of 50 against all GPUs is based on its specification profile rather than measured results. The RTX 4070, by contrast, holds an 81st percentile ranking across all GPUs, which places it well above the midpoint of the database. Its nearest rivals confirm this positioning: the NVIDIA Tesla P4 scores 37,628, a delta of only 0.1 percent from the RTX 4070, and the AMD Radeon RX Vega 56 scores 37,507, a 0.4 percent gap. The NVIDIA GeForce RTX 4080 Mobile sits 1.3 percent higher at 38,135, while the AMD Radeon PRO W6400 trails by 1.3 percent at 37,157. These clustered results indicate the RTX 4070 operates in a tightly contested performance band, with its closest peers within roughly 1.5 percent in either direction.

Because the MI355X has no measured scores, no head-to-head wins can be assigned to either part. The data instead shows a comparison between a measured consumer GPU and an unmeasured server accelerator. The RTX 4070 delivers concrete, repeatable results across a wide spread of APIs, while the MI355X remains a specification-only entry in the database at this time.

Where Each One Wins

The NVIDIA GeForce RTX 4070 wins in every category where recorded benchmark data exists. Its Vulkan score of 174,152 and OpenCL score of 154,858 demonstrate strong compute performance under those APIs. The DirectX legacy tests show lower raw numbers, but the part still completes all of them, which confirms broad API coverage: DirectX 9 at 320, DirectX 10 at 139, DirectX 11 at 244, and DirectX 12 at 103. The Passmark G3D result of 26,927 and G2D result of 1,164 round out its measured profile.

The MI355X has no wins in the database because it has no benchmark entries. Its role as a server accelerator with no display outputs means it is not designed for the same workload class as the RTX 4070. The RTX 4070 is a dual-slot consumer graphics card with display outputs, while the MI355X is an OAM module with no outputs. The data indicates the RTX 4070 is the only one of the two with recorded performance evidence, so any use-case analysis must rely on the RTX 4070's measured results and the MI355X's architectural specifications.

For the RTX 4070, the benchmark distribution suggests strength in compute-heavy workloads. The Vulkan and OpenCL scores are substantially higher than the legacy DirectX scores, which indicates the part scales better with modern, low-overhead APIs. The DirectX 9 score of 320 is the highest of the legacy tests, but the DirectX 12 result at 103 is the lowest, which is an unusual pattern that may reflect the specific test workloads rather than general capability. The G2D score of 1,164 versus the G3D score of 26,927 shows the part is heavily weighted toward 3D and compute performance, not 2D rasterization.

Architecture Differences

The two accelerators are built on different architectures with different design goals. The AMD Instinct MI355X uses the CDNA 4.0 architecture, fabricated on a 3 nm process at TSMC. It is built around the MI350 256CU chip, which contains 185,000 million transistors on a 2,380 mm² die. The transistor density is 77.7 million per square millimeter. The architecture is designed for compute acceleration with no graphics API support: DirectX, OpenGL, and Vulkan are all listed as N/A. It has no display outputs, no raster operations pipelines, and no ray tracing cores or tensor cores listed.

The NVIDIA GeForce RTX 4070 uses the Ada Lovelace architecture, fabricated on a 5 nm process at TSMC. Its AD104 chip contains 35,800 million transistors on a 294 mm² die, giving a transistor density of 121.8 million per square millimeter. This is a significantly denser design than the MI355X die, despite the MI355X having far more total transistors. The RTX 4070 includes 46 ray tracing cores and 184 tensor cores, which are absent from the MI355X's specification sheet. It also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, making it a full-featured graphics and compute part.

The memory architectures differ completely. The MI355X uses HBM3e memory with 288 GB capacity, an 8,192-bit bus width, and 8.19 TB/s bandwidth. The RTX 4070 uses GDDR6X with 12 GB capacity, a 192-bit bus width, and 504.2 GB/s bandwidth. The MI355X has roughly 16 times the memory bandwidth of the RTX 4070, which reflects its server-oriented compute role. The MI355X memory clock is listed at 2000 MHz with 8 Gbps effective, while the RTX 4070 memory clock is 1313 MHz with 21 Gbps effective.

The MI355X has 16,384 shading units, 1,024 texture mapping units, and no ROPs. The RTX 4070 has 5,888 shading units, 184 TMUs, and 64 ROPs. The pixel rate for the MI355X is listed as 0 MPixel/s, while the RTX 4070 delivers 158.4 GPixel/s. The texture rate for the MI355X is 2,457.6 GTexel/s, compared to 455.4 GTexel/s for the RTX 4070.

Specification Differences

The power requirements differ drastically. The MI355X has a TDP of 1,400 W with a suggested power supply of 1,800 W, while the RTX 4070 has a TDP of 200 W with a suggested power supply of 550 W. The MI355X uses no power connectors because it is an OAM module, while the RTX 4070 uses a single 16-pin connector. The MI355X has no display outputs, while the RTX 4070 includes 1x HDMI 2.1 and 3x DisplayPort 1.4a.

The physical dimensions also differ. The MI355X measures 102 mm in length and 165 mm in width, while the RTX 4070 measures 240 mm in length, 110 mm in height, and 40 mm in width. The MI355X is an OAM Module form factor, while the RTX 4070 is a dual-slot card.

The bus interfaces differ by one generation. The MI355X uses PCIe 5.0 x16, while the RTX 4070 uses PCIe 4.0 x16. The release dates are roughly two years apart: the MI355X was released on 2025-06-11, and the RTX 4070 was released on 2023-04-11. The RTX 4070 has a launch MSRP of 599 USD and is marked end-of-life, with the GeForce 50 series as its successor. The MI355X has no launch MSRP listed and no production status.

The clock speeds show different design points. The MI355X has a base clock of 1000 MHz and a boost clock of 2400 MHz. The RTX 4070 has a base clock of 1920 MHz and a boost clock of 2475 MHz. The RTX 4070 runs at a higher base clock, but the boost clocks are close. The MI355X delivers 78.64 TFLOPS in both FP32 and FP16, while the RTX 4070 delivers 29.15 TFLOPS in both. The MI355X has a 64-bit and 16-bit compute advantage of roughly 2.7 times the RTX 4070's recorded figures.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GeForce RTX 4070 has an average benchmark score of 37,648. The AMD Instinct MI355X has no recorded benchmark scores, so its average is 0 in the database.

Q: How does the RTX 4070 compare to its nearest rivals?

A: The RTX 4070 sits within 1.3 percent of all four nearest rivals. It is 0.1 percent ahead of the NVIDIA Tesla P4, 0.4 percent ahead of the AMD Radeon RX Vega 56, 1.3 percent behind the NVIDIA GeForce RTX 4080 Mobile, and 1.3 percent ahead of the AMD Radeon PRO W6400.

Q: What is the memory capacity difference?

A: The AMD Instinct MI355X has 288 GB of HBM3e memory with an 8,192-bit bus and 8.19 TB/s bandwidth. The NVIDIA GeForce RTX 4070 has 12 GB of GDDR6X memory with a 192-bit bus and 504.2 GB/s bandwidth.

Q: Which part supports ray tracing?

A: The NVIDIA GeForce RTX 4070 includes 46 ray tracing cores and 184 tensor cores. The AMD Instinct MI355X lists no ray tracing cores and no tensor cores in the database.

Q: What are the power consumption figures?

A: The MI355X has a TDP of 1,400 W with a suggested power supply of 1,800 W. The RTX 4070 has a TDP of 200 W with a suggested power supply of 550 W.

Q: Which APIs does each part support?

A: The MI355X lists DirectX, OpenGL, and Vulkan as N/A. The RTX 4070 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.