Memory - The
computer's workspace (physically, a collection of RAM chips). An important
resource, since Memory determines the size and number of programs to be
run simultaneously, as well as the amount of data to be processed
All program execution and data processing takes place in Memory. The
Program or Application's instructions are copied into Memory from HD Disk,
then extracted from Memory into the control unit circuit for analysis and
execution. The instructions direct the computer to input data into memory
from a keyboard, disk, tape or communications channel.
As data is entered into Memory, the previous contents of that space are
lost. Once data is in Memory, it can be processed (calculated, compared
and copied). The results are sent to a screen, printer, disk, tape or
Typically the 1st PC Upgrade will consist of
adding RAM Memory Modules.
Above Paraphrased from www.computerlanguage.com
- The Best Computer Dictionary Going!
Memory types discussed here and on
our RAM Chart are
related to Desktop Memory Modules and NOT Laptops @ this time! Enjoy! GB
However... When asking How much
RAM Memory should one need or get? "Recent tests conducted in the
Crucial Performance Lab on a Latitude D600 notebook reveal that increasing
the memory from 128 MB to 512 MB resulted in an 82 percent performance
gain." www.Crucial.com And so it
goes... More IS better! ;)
Although DDR & RAMBUS have the same pin count, they are keyed
differently and therefore these disparate RAM Module Technologies are not
Memory Slot compatible. The computer industry refers to the RAMBUS
Data Rate as the RIMM Speed.
DDR Memory: Peak bandwidth of 6.4
GB per second. And what does DDR stand for? Don't Do Rambus! OK, DDR =
Double Data Rate.
DDR Speeds: DDR is running at
100Mhz, 133Mhz, 166Mhz or 200MHz. This separates DDR from previous SDRAM
since DDR can transfer Memory on both the rise and the fall of a clock
cycle. Essentially, we're getting 200Mhz, 266Mhz, 333Mhz or 400MHz,
respectively. Peak bandwidth for 200Mhz equals 1.6GB/sec and 266Mhz equals
2.1GB/sec. DDR is now known as PC1600 (200Mhz), PC2100 (266Mhz) and PC2700
(333Mhz), as it correlates to the peak bandwidth potential. PC2100
DDR SDRAM = DDR266 is 2x as fast as PC133. Match your DDR Memory
Speed to your Processor FSB Speed to maximize Performance!
Channel DDR: When Dual
Channel DDR Technology is activated, the bandwidth of Memory Bus will be
double the original Memory Bus, with the fastest speed at 6.4GB/s DDR400.
To activate Dual Channel DDR Memory, two DDR Memory Modules are inserted
individually, one each into Channel A and Channel B.
If two DDR Memory Modules are inserted into the same Channel (DIMM 1,2,3
or DIMM 4,5,6) then Dual Channel Technology will operate ONLY as Single
Channel Memory. Use Single Side Memory Modules and all Modules must be of
We never used nor advocated the use of RAMBUS Memory. Only DDR! And
what does DDR stand for? Get it!
Quoting Intel: "800 MHz, 533 MHz
or 400 MHz System Bus -
The Pentium 4 processor's 800 MHz system bus supports Intel's
highest-performance desktop processor by delivering 6.4 GB of
data-per-second into and out of the processor. This is accomplished
through a physical signaling scheme of quad pumping the data transfers
over a 200 MHz (FSB) clocked system bus and a buffering scheme
allowing for sustained 800 MHz data transfers. The Pentium 4
processor's 533 MHz (FSB) system bus supports Intel's performance
desktop processor by delivering 4.2 GB of data-per-second into and
out of the processor. This is accomplished through a physical signaling
scheme of quad pumping the data transfers over a 133 MHz (FSB)
clocked system bus and a buffering scheme allowing for sustained 533
MHz data transfers. The Pentium 4 processor's 400 MHz (FSB)
system bus supports Intel's performance desktop processor by delivering 3.2
GB of data-per-second into and out of the processor. This is
accomplished through a physical signaling scheme of quad pumping the data
transfers over a 100 MHz (FSB) clocked system bus and a buffering
scheme allowing for sustained 400 MHz data transfers. This compares
to 1.06 GB/s delivered on the Pentium III
processor's 133 MHz (FSB) system bus." See: Intel
Pentium 4 Processor Product Overview & Intel
Memory News Updates:
- www.quadbandmemory.com -
Quad Band Memory, Delivering tomorrow's bandwidth today:
Band Memory, Significant Availability & Price Performance
- DDR II for PCs could be delayed until next year: "...DDR
400 (PC 3200) Memory has passed a validation test by JEDEC..."
Published 1-9-03 (6/9/2003)
- DDR-II SDRAM specs unveiled: Published 3-28-02 (6/9/2003)
- Now available at Crucial: PC3200 (DDR400) -
In response to a growing number of requests for
high-quality PC3200 DDR SDRAM (DDR400), Crucial is now offering this
higher speed memory solution. Both 256MB ($69.99) and 512MB ($120.99)
PC3200 modules are now available at Crucial.com
- DRAM MEMORY TRENDS 2002
DDR400 (PC3200) recommended memory modules list (9/16/2002).
Unofficial Guide to DDR400 or PC3200 DDR from SimmTester.com
Standard Memory Price Comparison - iBuyer.net
Free Memory Buying Guide (Wed, 7/10/02).
PC1066 Memory Worth the Price? So you're
thinking Intel P4's + Intel 845e Chipset & RAMBUS RAM? And what
does DDR stand for - Don't Do RAMBUS! Any
questions? And... What WERE you thinking
upgrades from Crucial.com - RAM Upgrade Installation (Wed,
Samsung Develops Prototype DDR-II SDRAM (5/30/2002).
Recognizing DDR Memory Modules (5/21/2002).
ALERT! Irradation of the US Mail Click
here for details (5/21/2002).
- Analysts still see DRAM recovery after market collapses this week
New Memory Roadmap Big Changes Ahead:
DDR From IDF (3/01/2002).
Agenda - VIA DDR333 Summit - 20th February 2002
Modular Technologies Joins CMTL Memory Module Certification Program -
Computer Memory Test Labs
publications from CST: DEFINING DDR MEMORY AND DDR DIMM
DIMMS - PC100 / PC133, Intel's RAMBUS & AMD's DDR:
memory.html - Joe Whinery's Memory
Presentation: What’s Happening in the Memory World
DDR vs Non DDR -
RAM Misconceptions by Joe Whinery
- DDR RAM Memory and DDR SDRAM Products
(Micron - Crucial)
PC2100 Now Available!
- Windows ME RAM Requirements
Technology Company - PC Memory Assessor
Rambus RDRAM 1066 Memory for Intel 850e chipset.
Components - Desktop
RAM (MRAM) Memory:
Toshiba partner on memory chips - Tech News - CNET.com
Productions -- CTN: Technologies
That May Change the Future: Will Any Break The Magnetic Monopoly?
Launches New MRAM Memory Process Development Initiative
- MRAM pioneer hopes MRAMs set for liftoff
Parker: Instant-On Computing through Magnetic Solid-State Memory
Program known as Magneto Resistive RAM (MRAM) being developed by IBM
& Motorola... MachineDesign.com:
to a computer near you- magnetic memory (May 3, 2001) ...PDF
Magnetoresistive Random Access Memory (MRAM) Technology
Set to Lead Industry with 256k MRAM (2/06/01)
- Mu-Chip Emerging Technology - Thin
enough to embed in paper - No Bull! Hitachi
Hitachi Announces world's smallest RFID IC, the mu-chip (7/03/01).
SRAM - The High Bandwidth SRAM Family
(Originally reported on
BuildOrBuy on Wed, 04/04/01.)