The RAM is use in laptops are SD-RAM
A computer will not accept a new RAM that has a different voltage than the factory installed RAM cards.
One can purchase Dell ram cards from Dell's website. They come in many varieties. They come in 1GB, 2GB, 4GB, 8GB, and 16GB. The ram cards also come with different connector types such as DDR, DDR2, and DDR3.
Kingston makes several different types of RAM hardware, including system specific RAM and a value priced line.
Yes, video cards generally have PCI-E pin arrangement. I have seen a couple with PCI before, but nowadays i think companies are leaning towards the PIC-E now.
Northbridge
Most if not ALL modern video/graphics cards use both RAM from the MoBo and The dedicated RAM on the card.
The reason for RAM not being intergrated on a motherboard is because theres different RAM sizes and how much RAM a motherboard can handle along with RAM speeds. My motherboard can handle up to 16gb RAM and that is equal to 4 4GB RAM cards and the speeds my motherboard can handle are 2000MHz.
No, you'l fry your motherboard, and ruin your entire computer, avoid mixing different DDR ram, and size. I suggest consulting a professional. CompUsa.
Depending on what your motherboard can handle, all the RAM (regardless of clockspeed) will clock to the same speed.
No, the slots for DDR2 RAM is different from the DDR RAM. You cannot use DDR RAM with DDR2 slot.
RAM is made out of Memory chips which contains the memory