AMD Ryzen 7 8745HX VS AMD Ryzen 9 8945HX

Both the AMD Ryzen 7 8745HX and the AMD Ryzen 9 8945HX are designed for laptop and desktop use, offering versatile performance across different form factors.

Each processor has integrated graphics, a Thermal Design Power (TDP) of 55W, and utilizes a 5 nm semiconductor size. The maximum CPU temperature for both products is listed at 100 °C, indicating a similar thermal handling capacity. Additionally, both processors support PCI Express (PCIe) version 5, ensuring high-speed data transfer capabilities.

Both CPUs are also compatible with 64-bit systems, with no differences between them in terms of architecture or software support.

The AMD Ryzen 7 8745HX has a CPU speed of 8 x 3.6 GHz, whereas the AMD Ryzen 9 8945HX operates at a lower base speed of 16 x 2.5 GHz. The Ryzen 7 8745HX uses fewer cores but at a higher frequency per core. Both processors feature turbo clock speeds, with the Ryzen 7 reaching up to 5.1 GHz and the Ryzen 9 achieving a slightly higher turbo speed of 5.4 GHz.

In terms of threads, the Ryzen 7 8745HX supports 16 threads, while the Ryzen 9 8945HX supports 32 threads, offering a higher degree of parallelism for demanding tasks. Both processors have an unlocked multiplier, which allows for overclocking, and neither uses big.LITTLE technology.

When it comes to cache, the Ryzen 7 has 8 MB of L2 cache and 32 MB of L3 cache, while the Ryzen 9 offers 16 MB of L2 cache and 64 MB of L3 cache. Both processors have the same L2 and L3 cache size per core: 1 MB/core for L2 and 4 MB/core for L3. The Ryzen 9 has a higher total cache capacity, which could benefit larger workloads or memory-intensive applications.

Both the AMD Ryzen 7 8745HX and the AMD Ryzen 9 8945HX feature the same integrated graphics setup. Both processors are equipped with the Radeon 610M GPU, which operates at a base GPU clock speed of 400 MHz and can turbo up to 2200 MHz. The GPU includes 2 execution units, 8 texture mapping units (TMUs), 4 render output units (ROPs), and 128 shading units, with identical specifications in both processors.

In terms of supported technologies, both processors support DirectX 12, but the Ryzen 9 supports the more advanced DirectX 12 Ultimate version, while the Ryzen 7 supports the standard DirectX 12 version. Other features like OpenGL 4.6 and OpenCL 2.1 are the same for both processors, and both can support up to 4 displays.

Overall, the only difference between the integrated graphics of the two processors is the DirectX version, with the Ryzen 9 offering a more feature-rich DirectX 12 Ultimate support.

The AMD Ryzen 7 8745HX and the AMD Ryzen 9 8945HX offer identical memory specifications. Both processors support a maximum RAM speed of 5200 MHz and use DDR5 memory, ensuring fast and efficient data handling. Each processor has two memory channels, which can improve performance by allowing simultaneous data transfer across multiple paths.

In terms of maximum memory capacity, both processors support up to 64 GB of RAM, providing ample memory for demanding tasks. Additionally, neither processor supports ECC (Error-Correcting Code) memory, which would be relevant for applications requiring enhanced data integrity.

As a result, the memory capabilities of both processors are exactly the same, with no differences in terms of speed, capacity, or support for specific memory technologies.

The AMD Ryzen 7 8745HX and the AMD Ryzen 9 8945HX share identical features when it comes to instruction sets, multithreading, and additional security features. Both processors support a range of instruction sets including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, ensuring compatibility with various modern software applications.

Both processors also support multithreading, allowing them to handle multiple threads simultaneously, improving performance in multi-tasking scenarios. Additionally, each processor has the NX (No Execute) bit, which is a security feature that helps prevent malicious code from executing in certain memory regions.

As a result, there are no differences in the feature set between the Ryzen 7 8745HX and the Ryzen 9 8945HX in this category; both are equally equipped in terms of supported instructions and security features.