On 21 Apr 2002, at 12:15pm, Kenneth E. Lussier wrote: > One of the problems is that there seem to be many different levels of DDR > (ranging from PC1600 to PC3200).
Heh. Well, PC66, PC100, and PC133 all refer to the clock speed of the bus driving the memory. 66 MHz, 100 MHz, and 133 MHz. After that, sanity departs. You see, along came RAMBUS, which uses a much higher clock (600 MHz or 800 MHz), but with a much narrower data bus (8-bit, I think). So RAMBUS could advertise PC800 RAM, which fooled stupid people into think that PC800 was eight times better than PC100. So the SDRAM camp decided to come up with a designation that measured the "memory bandwidth", resulting in designations like PC1600, which fooled stupid people into thinking that PC1600 was twice as better as PC800 RAMBUS. (Smart people like you and me just go, "WTF is with all these numbers?!?") For the record, PC400 and PC800 are RAMBUS RAM (RDRAM), which is evil. PC1600 is DDR with an actual clock of 100 MHz and an effective clock of 200 MHz. PC2100 is DDR with an actual clock of 133 MHz and an effective clock of 266 MHz. I am not sure on the DDR300 and DDR333 stuff, other than to say that I have heard rumor that some of it is just overclocked DDR266. Are we sufficiently confused yet? :-) -- Ben Scott <[EMAIL PROTECTED]> | The opinions expressed in this message are those of the author and do not | | necessarily represent the views or policy of any other person, entity or | | organization. All information is provided without warranty of any kind. | ***************************************************************** To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *****************************************************************
