MS word with more than 1000 pages with A3 paper size

For a very large Word document in Arabic (1000+ A3 pages), you’ll get the smoothest experience with a PC that has at least 16–32 GB of RAM, because Word loads big documents heavily into memory. A modern multi-core processor like an Intel i7/i9 or AMD Ryzen 7/9 will also help reduce delays when scrolling, searching, or saving. Word is not very GPU-dependent, but having a dedicated graphics card can make display rendering a bit smoother—though it’s optional. Finally, use a fast SSD (NVMe preferred) instead of a hard drive, as this significantly improves opening and saving large files.

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