AMD Instinct MI355X vs NVIDIA RTX 500 Mobile Ada Generation Comparison

# AMD Instinct MI355X vs NVIDIA RTX 500 Mobile Ada Generation

The AMD Instinct MI355X and NVIDIA RTX 500 Mobile Ada Generation occupy opposite ends of the GPU spectrum, one a data center compute module and the other a laptop integrated graphics processor. The recorded data shows no direct head-to-head benchmark wins for either part, and both sit at the 50th percentile among all GPUs in the database. Despite that parity in percentile ranking, the raw specifications reveal two fundamentally different design goals: the MI355X delivers massive compute throughput for accelerators, while the RTX 500 Mobile targets efficiency and portability.

Where Each One Wins

The AMD Instinct MI355X is built for compute-dense workloads. Its 16,384 shading units, 1,024 texture mapping units, and 78.64 TFLOPS FP32 throughput place it in a class of hardware intended for high-performance computing, AI inference, and scientific simulation. The 288 GB of HBM3e memory with 8.19 TB/s bandwidth dwarfs virtually any other GPU memory subsystem, making it suited for models and datasets that exceed the memory capacity of conventional graphics cards. The MI355X has no display outputs, no pixel rate (0 MPixel/s), and no DirectX, OpenGL, or Vulkan API support, which confirms its role as a non-rendering accelerator.

The NVIDIA RTX 500 Mobile Ada Generation wins on portability and integration. It uses a 35 W TDP, fits as an IGP (integrated graphics processor), and relies on portable-device-dependent display outputs. With 2,048 shading units, 64 TMUs, and 32 ROPs, it provides 8.294 TFLOPS FP32 and 64.80 GPixel/s pixel throughput. It carries full API support including DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, meaning it can handle graphics rendering, ray tracing (16 RT cores), and tensor operations (64 tensor cores) in a mobile form factor. The RTX 500 Mobile also has a production status of "Active," while the MI355X has no production status recorded.

The use-case split is clear: the MI355X wins for memory-bound compute and massive parallel workloads, while the RTX 500 Mobile wins for graphics rendering, ray tracing, and low-power mobile systems.

Architecture Differences

The MI355X uses the CDNA 4.0 architecture, built on a 3 nm process at TSMC. It integrates 185,000 million transistors on a 2,380 mm² die, yielding a transistor density of 77.7M per mm². The chip is designated "MI350 256CU," indicating 256 compute units. The architecture is designed for compute, not graphics, and the absence of RT cores and tensor cores in the recorded data reflects that focus, though the FP16 throughput matches FP32 at 78.64 TFLOPS (1:1), which is typical for compute-oriented accelerators.

The RTX 500 Mobile uses the Ada Lovelace architecture, built on a 5 nm process at TSMC. It packs 18,900 million transistors on a 159 mm² die, giving a higher transistor density of 118.9M per mm². The chip is AD107, a small mobile-class die. Ada Lovelace includes dedicated RT cores (16) and tensor cores (64), enabling hardware-accelerated ray tracing and AI processing. Both FP16 and FP32 run at 8.294 TFLOPS (1:1) on the RTX 500 Mobile.

The process node difference (3 nm versus 5 nm) does not translate into density superiority for the MI355X, because its massive die and enormous transistor count dominate the density calculation. The RTX 500 Mobile achieves higher density per square millimeter, but the MI355X offers over 9 times more FP32 throughput and 72 times more memory capacity.

Head-to-Head Benchmarks

The database contains no recorded head-to-head benchmark results between the MI355X and RTX 500 Mobile. Neither part has benchmark scores, average scores of 0, and no nearest rivals are listed. The wins count is 0 for both. This absence of direct measurements means any comparison must rely on the specification-level data.

The FP32 compute gap is substantial: 78.64 TFLOPS versus 8.294 TFLOPS. That is roughly 9.5 times higher throughput for the MI355X, a difference that would dominate any compute benchmark that scales with shader count and clock speed. The MI355X also has 8 times the shading units (16,384 versus 2,048) and 16 times the TMUs (1,024 versus 64).

Memory bandwidth shows an even larger disparity. The MI355X delivers 8.19 TB/s versus 128.0 GB/s for the RTX 500 Mobile, a 64-fold difference. Memory capacity is 288 GB versus 4 GB, a 72-fold difference. These gaps indicate that memory-bound workloads such as large language model inference or scientific simulations would favor the MI355X overwhelmingly.

However, the RTX 500 Mobile has strengths where the MI355X has no capability at all. The RTX 500 Mobile has a pixel rate of 64.80 GPixel/s, while the MI355X is recorded at 0 MPixel/s. The RTX 500 Mobile supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4; the MI355X reports N/A for all three APIs. The RTX 500 Mobile has 32 ROPs, while the MI355X has none. These differences mean the RTX 500 Mobile can render graphics frames and handle gaming or workstation display workloads, while the MI355X cannot output any video signal.

Clock speeds also differ: the MI355X runs at 1000 MHz base and 2400 MHz boost, while the RTX 500 Mobile runs at 1485 MHz base and 2025 MHz boost. The RTX 500 Mobile has a higher base clock, but the MI355X has a higher boost clock. Memory clock is identical at 2000 MHz, but effective data rates differ: 8 Gbps effective for the MI355X versus 16 Gbps effective for the RTX 500 Mobile, reflecting the different memory types (HBM3e versus GDDR6).

Specification Differences

The two GPUs differ across nearly every recorded specification field. The MI355X uses HBM3e memory with an 8192-bit bus, while the RTX 500 Mobile uses GDDR6 with a 64-bit bus. The MI355X offers 288 GB of memory; the RTX 500 Mobile offers 4 GB. Bandwidth is 8.19 TB/s versus 128.0 GB/s.

Shading units: 16,384 on the MI355X versus 2,048 on the RTX 500 Mobile. TMUs: 1,024 versus 64. ROPs: 0 versus 32. RT cores: none recorded on the MI355X versus 16 on the RTX 500 Mobile. Tensor cores: none recorded on the MI355X versus 64 on the RTX 500 Mobile.

Pixel rate: 0 MPixel/s versus 64.80 GPixel/s. Texture rate: 2,457.6 GTexel/s versus 129.6 GTexel/s. FP32: 78.64 TFLOPS versus 8.294 TFLOPS. FP16: 78.64 TFLOPS (1:1) versus 8.294 TFLOPS (1:1).

TDP: 1400 W versus 35 W. The MI355X requires a suggested PSU of 1800 W; the RTX 500 Mobile has no suggested PSU recorded. Slot width: OAM Module versus IGP. Power connectors: None for both. Bus interface: PCIe 5.0 x16 versus PCIe 4.0 x8.

Display outputs: "No outputs" versus "Portable Device Dependent." API support: N/A for the MI355X versus DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 for the RTX 500 Mobile. Process node: 3 nm versus 5 nm. Transistors: 185,000 million versus 18,900 million. Die size: 2380 mm² versus 159 mm². Transistor density: 77.7M per mm² versus 118.9M per mm².

The MI355X has dimensions recorded (102 mm length, 165 mm width), while the RTX 500 Mobile has no dimensions. The MI355X launched on 2025-06-11; the RTX 500 Mobile launched on 2024-02-25. The RTX 500 Mobile lists a predecessor (Ampere-MW) and successor (Blackwell-MW); the MI355X lists a predecessor (Radeon Instinct) and no successor. The RTX 500 Mobile has a production status of "Active"; the MI355X has none recorded.

FAQ

Q: Which GPU has higher FP32 compute throughput?

A: The AMD Instinct MI355X delivers 78.64 TFLOPS FP32, compared to 8.294 TFLOPS for the NVIDIA RTX 500 Mobile Ada Generation. That is approximately 9.5 times higher throughput for the MI355X.

Q: Can the MI355X render graphics or output video?

A: No. The MI355X has 0 MPixel/s pixel rate, no ROPs, no display outputs, and no DirectX, OpenGL, or Vulkan API support. The RTX 500 Mobile, by contrast, has 64.80 GPixel/s pixel rate, 32 ROPs, and full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support.

Q: How do the memory subsystems compare?

A: The MI355X uses 288 GB of HBM3e with an 8192-bit bus and 8.19 TB/s bandwidth. The RTX 500 Mobile uses 4 GB of GDDR6 with a 64-bit bus and 128.0 GB/s bandwidth. The MI355X offers 72 times more capacity and 64 times more bandwidth.

Q: What is the power draw difference?

A: The MI355X has a TDP of 1400 W and requires a suggested PSU of 1800 W. The RTX 500 Mobile has a TDP of 35 W and no suggested PSU recorded. The RTX 500 Mobile uses 40 times less power.

Q: Which GPU supports ray tracing and tensor operations?

A: Only the RTX 500 Mobile has recorded RT cores (16) and tensor cores (64). The MI355X has no RT cores or tensor cores listed in the database.

Q: When was each GPU released?

A: The AMD Instinct MI355X was released on 2025-06-11. The NVIDIA RTX 500 Mobile Ada Generation was released on 2024-02-25. The RTX 500 Mobile is listed as Active in production status, while the MI355X has no production status recorded.