intel82801 is a southbridge chip for the intel motherboard chipset. We call this model the ICH4
The 82801DB ultra ATA Storage Con traller-24CB refers to the ATA hard disk controller integrated in this Southbridge chip.
The best memory for the 845G motherboard is 1G, that is, two 512M sticks can be inserted. The so-called best memory is 1G, that is, when it is less than 1G, the speed of the motherboard is affected, and after more than 1G, the speed is basically the same as when 1G, there is no greater change.