AMD Ryzen AI Max Pro 390 VS Intel Core Ultra 7 255H

At the platform level, one of the most telling differences is Thermal Design Power: the Ryzen AI Max Pro 390 is rated at 55W, nearly double the Intel Core Ultra 7 255H's 28W. In practice, this means AMD is willing to consume significantly more energy to deliver its performance — a trade-off that can translate to higher sustained throughput in demanding workloads, but at the cost of battery life and thermal headroom in thin laptops. The Intel chip, by contrast, is architected for efficiency-first mobile designs where thermals and endurance are primary constraints.

On the silicon side, the Core Ultra 7 255H is built on a 3 nm process versus the Ryzen AI Max Pro 390's 4 nm, giving Intel a slight manufacturing edge that typically contributes to better power efficiency per transistor. Intel also steps ahead with PCIe 5 support compared to AMD's PCIe 4, which matters for users pairing the chip with next-generation NVMe SSDs or discrete GPUs that can saturate PCIe 5 bandwidth — though real-world bottlenecks at PCIe 4 speeds are rare today. The Intel chip also supports a slightly higher maximum CPU temperature at 110 °C versus AMD's 100 °C, giving it marginally more thermal headroom before throttling.

One notable exclusive for the Ryzen AI Max Pro 390 is its compatibility with both laptop and desktop platforms, while the Core Ultra 7 255H is laptop-only. Overall, neither chip dominates across the board: Intel holds a modest edge in process node, PCIe generation, and power efficiency, making it the stronger fit for ultraportables; AMD's higher TDP ceiling and platform flexibility give it an advantage where raw sustained performance and deployment versatility matter more than frugality.

The AMD Ryzen AI Max Pro 390 and Intel Core Ultra 7 255H differ significantly in their CPU architecture and performance characteristics. The Ryzen AI Max Pro 390 has a CPU speed of 12 cores running at 3.2 GHz each, with a turbo clock speed of 5 GHz. In contrast, the Intel Core Ultra 7 255H has a mixed configuration of 6 high-performance cores running at 2 GHz and 8 efficiency cores running at 1.5 GHz, along with a turbo clock speed of 5.1 GHz.

In terms of CPU threads, the Ryzen AI Max Pro 390 supports 24 threads, while the Intel Core Ultra 7 255H has 16 threads, meaning the Ryzen processor can handle more parallel tasks at once. Both processors feature a turbo clock speed close to 5 GHz, with the Ryzen hitting 5 GHz exactly and the Intel reaching 5.1 GHz, showing a very slight difference.

Both processors have an L3 cache, but the Ryzen AI Max Pro 390 offers 64 MB, whereas the Intel Core Ultra 7 255H has a smaller 24 MB cache. The Ryzen also lacks big.LITTLE technology, while the Intel processor incorporates it, allowing for more efficient power management. Neither processor has an unlocked multiplier, and both processors use a clock multiplier, with the Ryzen at 32 and the Intel at 20.

The AMD Ryzen AI Max Pro 390 and Intel Core Ultra 7 255H show differing results in benchmark scores. The Ryzen AI Max Pro 390 has a PassMark result of 43,189, which is significantly higher than the Intel Core Ultra 7 255H's PassMark result of 30,756. This indicates that the Ryzen processor may provide stronger overall performance in tasks that rely on multi-threaded processing.

However, when looking at single-thread performance, the Intel Core Ultra 7 255H outperforms the Ryzen AI Max Pro 390 with a single-thread PassMark result of 4,373, compared to the Ryzen’s 3,997. This suggests that for tasks that are more dependent on single-thread performance, the Intel processor may offer a slight advantage.

In summary, the AMD Ryzen AI Max Pro 390 has a higher overall PassMark score, while the Intel Core Ultra 7 255H shows a slight edge in single-thread performance.

The AMD Ryzen AI Max Pro 390 and Intel Core Ultra 7 255H both feature integrated graphics, but with different specifications. The Ryzen AI Max Pro 390 is equipped with the Radeon 8050S GPU, which has a turbo frequency of 2800 MHz. The Intel Core Ultra 7 255H, on the other hand, comes with the Arc 140T GPU, which has a turbo frequency of 2250 MHz. This indicates that the AMD processor’s integrated graphics may run at a higher speed compared to Intel's integrated graphics.

Both processors support DirectX 12, but the Intel Core Ultra 7 255H supports the more advanced DirectX 12 Ultimate, while the Ryzen AI Max Pro 390 only supports the standard DirectX 12. Both products also support OpenGL version 4.6 and OpenCL version 3, showing parity in these areas.

Regarding display outputs, both the AMD and Intel processors support up to 4 displays, offering similar capabilities for multi-monitor setups.

The AMD Ryzen AI Max Pro 390 and Intel Core Ultra 7 255H both support DDR5 memory, with a maximum RAM speed of 8000 MHz and 8400 MHz, respectively. This shows that the Intel processor can handle slightly faster RAM speeds compared to the Ryzen processor.

In terms of memory channels, the Ryzen AI Max Pro 390 supports 4 channels, while the Intel Core Ultra 7 255H supports only 2 channels. This suggests that the Ryzen processor may offer better memory bandwidth, benefiting tasks that rely on high-speed memory access.

Both processors support a maximum memory amount of 128 GB, and while the Ryzen AI Max Pro 390 supports ECC (Error-Correcting Code) memory, the Intel Core Ultra 7 255H does not. ECC memory helps to detect and correct data corruption, making it beneficial for tasks requiring high reliability.

Both the AMD Ryzen AI Max Pro 390 and Intel Core Ultra 7 255H support a similar set of instruction sets, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, allowing them to handle a wide variety of computing tasks efficiently.

One key difference is in multithreading capabilities. The Ryzen AI Max Pro 390 supports multithreading, which enables it to run multiple threads on each core, improving performance in multi-tasking and parallel processing scenarios. On the other hand, the Intel Core Ultra 7 255H does not support multithreading, meaning it may be less efficient when handling multiple simultaneous tasks.

Both processors have the NX bit feature, which enhances security by preventing the execution of code in certain areas of memory, reducing vulnerability to certain types of malware.