SDRAM : Computer Hardware Buyers’ Glossary

home page go to the Computer Buyers’ Glossary home go to the Java Glossary up Google search web for more information on this topic jump to foot of page translate this page with Babelfish punctuation 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z (all) ©1997-2012 Roedy Green, Canadian Mind Products
SDRAM
SDRAM (Synchronous Dynamic RAM) is very high speed RAM (Random Access Memory), 100 up to 200 MHz, the higher the number the faster. Technically it is synchronous memory that works in sync with the system bus, thereby avoiding wait states. It also has an on-chip burst facility. The most common kind of SDRAM has 168 pins. The pins are in three groups, 20, 60, 88. There is a notch between the groups. Depending on how the notches are offset, you can tell what kind of SDRAM you have. If the notch between the 20 and 60 is offset left, you have RFU (Reserved for Future Use) memory, centred: buffered, offset right: unbuffered. If the notch between the 60 and 88 is offset left, you have 5 volt memory, centred: 3.3 volt. These notches prevent you from installing the wrong kind. SDRAM DIMM (Dual In-line Memory Module)s are now the prevailing memory architecture, edging out EDO (Extended Data Out) RAM.
DDR-SDRAM
CMP homejump to top You can get the freshest copy of this page from: or possibly from your local J: drive (Java virtual drive/mindprod.com website mirror)
http://mindprod.com/bgloss/sdram.html J:\mindprod\bgloss\sdram.html
logo
Please email your , letters to the editor, errors, omissions, typos, formatting errors, ambiguities, unclear wording, broken/redirected link reports, suggestions to improve this page or comments to Roedy Green : feedback email. If you want your message, your name or email kept confidential, not considered for public posting, please explicitly specify that. Unless you state otherwise, I will treat your message as a letter to the editor that I may or may not publish in the feedback section. After that, it will be too late to retract it. If you disagree with something I said, please quote it and cite the web page where you found it, tell me why you think it is wrong, and, if possible, provide some supporting evidence. Threatening to kill me or spouting obscenities has yet to persuade me to change my mind.
mindprod.com IP:[65.110.21.43]
viewYour face IP:[38.107.179.214]
You are visitor number 8,323.