引用:
原帖由 metto 於 2012-9-5 17:21 發表 
其實 formula 唔多, 純粹係因為多圖所以個檔好大...
Take these points with grains of salts cause I am not the most intelligent hardware guy here.
I think big MS office files request lots of RAM and CPU. While there is a budget constraint, RAM is currently a cheaper upgrade. Unfortunately, formula or office functions or pictures are both CPU and RAM hungry.
These features reads and write from HD to RAM frequently. Now Office softwares will break the R/W sessions small, but that will mean frequent I/O HD to RAM to CPU to RAM to virtual memory i.e. HD and then a multi-tasking sessions initiate another cycle of I/O before the last cycle completes and release all the resources. In the old days, read / write took place in big chunk, so throughput was important and can somehow be the bottleneck. Now softwares are so "intelligently" designed but many simultaneous I/O took place. Memory controllers are in CPU, I/O controllers are at the chip sets, RAM chips and HD are hardware-dependant as well.
I.e. The way things are designed is to ask you for money to upgrade ALL parts if performance is to be optimal.
I believe in your case, RAM and SSD may address the most hidden bottlenecks if you are quite sure there are no calculation-intensive activities going on with your office files and internet applications. But then the PC industry is prohibiting customers from choosing these upgrade options unless you opt for the ultra-portable (i.e. expensive) solutions or top-of-the-line built-to-order PCs.
At the end, I am not able to help you any better than what the PC vendor has originally offered you. You paid less (to PC vendors), you got more bottlenecks.
