I know a little bit about Main Memory you have DRAM Chips and SDRAM Chips. DRAM Chips need to be Re Charged every Few ms to Hold the Bits in the Capacitor? Do I have this Right? SDRAM Chips do not need to be Re Charged every Few ms as long as the Power Supply is On? Do I have this Right? And I thought DRAM and SDRAM both need to be Re Charged? SRAM does not use Capacitors but Transistor MOSFETs. But Transistors just Turn On and Off they do not Hold a Charge. So how can it Hold Bits that the CPU may need?