AMD Instinct MI355X vs NVIDIA GeForce RTX 5070 Mobile Comparison

Head-to-Head Benchmarks

The recorded data presents an unusual comparison: the AMD Instinct MI355X has no benchmark entries in the database, while the NVIDIA GeForce RTX 5070 Mobile has nine recorded test scores. This means the head-to-head comparison is defined entirely by the absence of data for one part versus the presence of measurable results for the other.

The RTX 5070 Mobile delivers an average benchmark score of 29,928 across its test suite. Its strongest single result comes from Geekbench OpenCL at 122,238 points, followed closely by Geekbench Vulkan at 116,960. In PassMark testing, the GPU scores 20,355 in G3D, 8,279 in GPU Compute, 896 in G2D, and lower legacy DirectX results: 214 in DirectX 9, 192 in DirectX 11, 129 in DirectX 10, and 93 in DirectX 12.

The MI355X, by contrast, has no benchmark scores recorded, no average score, and no percentile ranking beyond the 50th percentile placeholder that applies to unmeasured parts. Its win count in the database stands at zero, and the RTX 5070 Mobile also has zero wins, because no head-to-head benchmark entries exist for this pairing. The data cannot show a performance advantage for either GPU because the MI355X was never tested under the same conditions.

What the database does show is the RTX 5070 Mobile's position among its nearest rivals. It sits 0.1% behind the NVIDIA GeForce RTX 3070 Ti, 0.5% ahead of the NVIDIA GeForce RTX 2080 Ti, 0.6% behind the AMD Radeon RX 6800, and 1.7% behind the AMD Radeon RX 6700. These deltas are small, indicating the mobile part lands in a tight performance cluster around the 29,800 to 30,400 score range.

The MI355X has no nearest rivals listed, no delta percentages, and no comparative scores. Its percentile versus all GPUs is 50, which is the default value for parts without measurements, not a statement of actual performance. The RTX 5070 Mobile, in contrast, holds a percentile of 75, meaning it ranks above three-quarters of all GPUs in the database based on its recorded scores.

The Verdict

The data supports only one clear conclusion: the NVIDIA GeForce RTX 5070 Mobile is a measured, benchmarked product with a verified performance profile, while the AMD Instinct MI355X has no recorded results to analyze. Anyone looking for a GPU with confirmed performance data should consider the RTX 5070 Mobile, which delivers scores that place it within 1.7% of several established desktop graphics cards.

The MI355X is a different class of hardware entirely. It uses 185,000 million transistors on a 2380 mm² die, compared to 21,900 million transistors on a 181 mm² die for the RTX 5070 Mobile. The power envelope is also vastly different: the MI355X lists a TDP of 1400 W with a suggested PSU of 1800 W, while the RTX 5070 Mobile runs at 50 W. These are not competing products in any practical sense.

For a builder or analyst relying on database measurements, the RTX 5070 Mobile is the only part with usable data. Its average score of 29,928 and 75th percentile ranking give it a concrete position in the GPU landscape. The MI355X, despite its massive specifications, offers no benchmark evidence to evaluate.

FAQ

Q: Does the AMD Instinct MI355X have any benchmark scores in the database?

A: No. The MI355X has an empty benchmark array, an average benchmark score of 0, and a percentile of 50, which is the default for unmeasured parts.

Q: What is the average benchmark score of the NVIDIA GeForce RTX 5070 Mobile?

A: The RTX 5070 Mobile has an average benchmark score of 29,928 across nine recorded tests.

Q: How does the RTX 5070 Mobile compare to the NVIDIA GeForce RTX 3070 Ti?

A: The RTX 5070 Mobile trails the RTX 3070 Ti by 0.1% in average benchmark score.

Q: Which GPU has a higher transistor count?

A: The AMD Instinct MI355X has 185,000 million transistors, compared to 21,900 million for the NVIDIA GeForce RTX 5070 Mobile.

Q: What is the TDP difference between these two GPUs?

A: The MI355X has a TDP of 1400 W, while the RTX 5070 Mobile has a TDP of 50 W.

Q: Does the MI355X support DirectX or Vulkan?

A: The database lists DirectX, OpenGL, and Vulkan as N/A for the MI355X. The RTX 5070 Mobile supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Specification Differences

The two GPUs differ in nearly every measurable specification. The MI355X uses a 3 nm process from TSMC, while the RTX 5070 Mobile uses a 5 nm process, also from TSMC. Transistor density favors the mobile part at 121.0M per mm² versus 77.7M per mm² for the MI355X, but total transistor count heavily favors the MI355X at 185,000 million versus 21,900 million.

Memory configurations are wildly different. The MI355X has 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth. The RTX 5070 Mobile has 8 GB of GDDR7 on a 128-bit bus with 384.0 GB/s bandwidth. Clock speeds also differ: the MI355X runs at 1000 MHz base and 2400 MHz boost, while the RTX 5070 Mobile runs at 907 MHz base and 1425 MHz boost.

Shading units number 16,384 for the MI355X versus 4,608 for the RTX 5070 Mobile. Texture mapping units are 1,024 versus 144. The MI355X has 0 ROPs and a pixel rate of 0 MPixel/s, while the RTX 5070 Mobile has 48 ROPs and a pixel rate of 68.40 GPixel/s. Texture rate is 2,457.6 GTexel/s for the MI355X and 205.2 GTexel/s for the RTX 5070 Mobile.

FP32 compute is 78.64 TFLOPS for the MI355X and 13.13 TFLOPS for the RTX 5070 Mobile. FP16 performance is listed as 1:1 for both parts. The MI355X has an OAM Module slot width and no display outputs, while the RTX 5070 Mobile is an IGP with portable-device-dependent outputs. The MI355X measures 102 mm by 165 mm, while the RTX 5070 Mobile has no recorded dimensions.

Architecture Differences

The MI355X is built on CDNA 4.0 architecture, which is AMD's compute-focused design lineage for the Instinct series. It uses the MI350 chip with 256 compute units. The RTX 5070 Mobile uses Blackwell 2.0 architecture on the GB206 chip, part of NVIDIA's GeForce 50-series mobile lineup.

The MI355X has no ray tracing cores and no tensor cores listed in the database. The RTX 5070 Mobile has 36 ray tracing cores and 144 tensor cores. The MI355X does not support DirectX, OpenGL, or Vulkan, reflecting its compute-only orientation. The RTX 5070 Mobile supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Memory technology differs fundamentally: HBM3e for the MI355X versus GDDR7 for the RTX 5070 Mobile. The MI355X uses an 8192-bit memory bus, while the RTX 5070 Mobile uses a 128-bit bus. The MI355X has no display outputs, making it unsuitable for graphics output, while the RTX 5070 Mobile's outputs depend on the portable device it is integrated into.

The MI355X uses no power connectors and has a suggested PSU of 1800 W. The RTX 5070 Mobile also uses no power connectors but has no suggested PSU listed. The MI355X's release date is recorded as June 11, 2025, while the RTX 5070 Mobile's release date is April 14, 2025. The MI355X's predecessor is listed as Radeon Instinct, while the RTX 5070 Mobile's predecessor is GeForce 40 Mobile.

Where Each One Wins

The RTX 5070 Mobile wins in every category where measurement exists. It has recorded benchmark scores, a 75th percentile ranking, and an average score of 29,928. It wins on support for graphics APIs, offering DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI355X has none. It wins on ray tracing and tensor core availability, with 36 RT cores and 144 tensor cores versus none for the MI355X. It wins on pixel rate, ROP count, and practical power consumption at 50 W.

The MI355X wins on raw specification counts. It has more shading units (16,384 versus 4,608), more texture mapping units (1,024 versus 144), a wider memory bus (8192-bit versus 128-bit), more memory capacity (288 GB versus 8 GB), higher memory bandwidth (8.19 TB/s versus 384.0 GB/s), higher FP32 compute (78.64 TFLOPS versus 13.13 TFLOPS), higher texture rate (2,457.6 GTexel/s versus 205.2 GTexel/s), and a larger die (2380 mm² versus 181 mm²).

The use case split is stark. The RTX 5070 Mobile is a graphics-capable mobile GPU with confirmed performance data, API support, and ray tracing hardware. The MI355X is a compute accelerator with no display outputs, no graphics API support, and no benchmark results. For gaming, graphics rendering, or any DirectX or Vulkan workload, the RTX 5070 Mobile is the only viable choice based on the data. For massive compute workloads that can use 288 GB of HBM3e memory and 78.64 TFLOPS of FP32 throughput, the MI355X offers specifications that the mobile part cannot approach, but those claims are unverified by benchmark results.

The database records no head-to-head benchmark entries, so no direct performance comparison is possible. The MI355X's win count is 0, and the RTX 5070 Mobile's win count is also 0. The practical takeaway is that the RTX 5070 Mobile is a measured product with a clear performance position, while the MI355X remains a specification sheet without test data.