Memomy in Computers
Computers need Random Access Memory (RAM) to execute programs and process data. This is diffrent from Permanent storage in Hard Disk Drives (HDD). RAMs are costly and comparing Hard Disks RAM memory is small. But Data retrieval is extremely fast in RAMs comparing Hard Disks.
Earlier computers (prior to 2000) had RAMs in the size of 16MB, 32 MB and 64 MB. The speed at which data is transferred from RAM to CPU (Central Processing Unit) is called bus speed (Usually Front Side Bus or FSB). These earlier RAMs are called SD-RAM. RD-RAMs are prior to SD-RAMs. The typical bus speed of these earlier SD-RAMs are 100MHz / 133 MHz.
These SD-RAMs were used in older Pentium III boards. Intel 810 chipsets or 82801 AA, 82801 AB chipsets were used on these mother boards. Typical Central processor speeds are 666MHZ, 700 MHz and 800 MHz.
My first PC was a HCL busy bee with Intel 810 chipset, Intel Pentium III cpu with 700 MHz speed, 10 GB Seagate Hard Disk Drive. 15 inch CRT Color Monitor. This configuration was the latest one at that time (in 2001). Nowadays the CPU speeds have doubled, tripled, multiplied by many times. Now there are dual-core and quad-core processors with more than 3 Ghz clock speed. RAM capacity too have increased. Now a typical new computer has a minimum of 1 GB (Giba byte) RAM and 256 GB of Hard Disk.
The older SD RAMs have been replaced by DDR RAMs. The popular RAM brands are hynix, hyundai, kingston and Transcend. The SDRAMs are used only in older computers. In old markets these are available. In coimbatore, 128 MB SDRAMs are available at Rs. 150. A relatively cheaper price. 256 MB SDRAMs are available at the price of Rs. 220. Newer 256 MB RAMs are available at a cost of Rs. 350. So you can upgrade your older PCs without affecting your pocket. Old 40 GB / 80 GB Hard Disk Drives are available at Rs. 750 and Rs. 1000 respectively.
Go and upgrade your PC or call 98422 84426 for support.