Why does adding more memory improve the performance of a computer system?

Solution
Generally it does, but not always. Having more DRAM can improve performance especially if using the iGPU rather than a discrete Graphics card as it allows more DRAM for the iGPU and the system proper. More can down on the use of the page file (the memory writing back and forth to the hard drive due to a lack of DRAM. Can increase depending on the apps or games you have, if they are memory intensive or use large data sets.

Tradesman1

Legenda in Aeternum
Generally it does, but not always. Having more DRAM can improve performance especially if using the iGPU rather than a discrete Graphics card as it allows more DRAM for the iGPU and the system proper. More can down on the use of the page file (the memory writing back and forth to the hard drive due to a lack of DRAM. Can increase depending on the apps or games you have, if they are memory intensive or use large data sets.
 
Solution

galeener

Distinguished
Depends on how much you start with say if you have 4 gigs and upgrade to 8 you could think of it as now there is more room in the fastest part of your system for data so it does't have tp go search the HDD for the info. Memory is the fastest accessable place to store data for your system. at a certain point you wouldnt notice the difference. Unless you used the remainder as a ram drive which is a different thing all together.so if you have say 16 gigs and you update to 24 you may not see a difference especially just gaming now if you used a memory intensive progran like raytracing or something you would notice some.