What is the difference between high density and low density 64MB SDRAM modules?
Some older motherboards using the VX/TX chipsets recognize high density 64MB DIMMs as 16MB. You need to buy the older 64MB(66Mhz) DIMMs made out of low density chips which are rarely available or to buy two low density 32MB DIMMs What are PC100 and PC133, PC143, PC 150? PC100 is the specification issued by Intel for SDRAM DIMMs used on systems with a 100mhz bus. PC133 (CAS 2 latency) is the emerging next generation memory chip running at 133 MHz. All SDRAMs are theoretically downward compatible. However a 133MHz chip may not always work in a 100MHz bus machines. It is advisable to use memory of same bus speeds at a all times to prevent locking up or crashing of machines. DRAM performance is measured with two metrics: bandwidth and latency. PC-133 memory delivers the highest performance in both areas. What is CAS latency? Latency is the time it takes for the memory devices, after getting a command and address to produce its first data word. CAS latency is the clock cycles between the is
