Second, notebooks are mainly used for general calculations. There are two main differences between brand-name machines: 1. main board structure has different designs, such as different positions of screws on the chassis and motherboard and different brands. . . 2. The 2.BIOS program is slightly different. So, if you have more money, you can buy a workstation. If you don't have much money and want to have fun, buy a good after-sales service. If you have enough money, buy more motherboard interfaces.
Third, the needs of mathematical calculation, special needs are generally solved by adding boards with external professional functions. If it is programming, it depends on whether your CPU value supports MMX, SSE and other special instruction sets. If it is math software such as Matlab, you'd better buy an accelerator card.
Of course, the bigger the memory, the better, but you can add memory when necessary. Memory is important because the operating system is a multitasking system. For example, operating system programs are resident from memory, and Windows upgrades frequently, which basically takes up more memory; Antivirus software often makes some messy updates; Open several virtual machines at the same time; Playing games while doing homework and so on are all multi-tasking requirements.