Thursday, October 30, 2008

SLC vs. MLC Flash Memory


SLC vs. MLC: An Analysis of Flash Memory




Single-level cell (SLC) and multi-level cell (MLC) Flash memory are similar in their design. MLC Flash devices cost less and allow for higher storage density. SLC Flash devices provide faster write performance and greater reliability, even at temperatures above the operating range of MLC Flash devices.

SLC Flash stores one bit value per cell, which basically is a voltage level. The bit value is interpreted as a “0” or a “1” and there are multiple values that an MLC cell can represent. The values can be interpreted as four distinct states: 00, 01, 10, or 11.


SLC and MLC Compared

Now that the differences between SLC and MLC have been explained, let’s compare their specifications to help further make a distinction between the two grades.


SLC MLC
Density 16Mbit 32Mbit 64Mbit
Read Speed 100ns 120ns 150ns
Block Size 64Kbyte 128Kbyte
Architecture x8 x8 / x16
Endurance 100,000 cycles 10,000 cycles
Operating Temperature Industrial Commercial


Advantages and disadvantages of SLC Flash and MLC Flash


SLC MLC
High Density
Low Cost per Bit
Endurance
Operating Temperature Range
Low Power Consumption
Write/Erase Speeds
Write/Erase Endurance

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Wednesday, October 29, 2008

Express Card

Express Card:

ExpressCard is a hardware standard replacing PC cards (also known as PCMCIA cards), both developed by the Personal Computer Memory Card International Association (PCMCIA). The host device supports both PCI Express and USB 2.0 connectivity through the ExpressCard slot, and each card uses whichever the designer feels most appropriate to the task. The cards are hot-pluggable. This is an open standard by ITU-T definition which can be obtained from the ExpressCard website. However, a US$2,500 fee[1] is required to access the documentation for non-PCMCIA members.


Uses
These slots can accept Firewire 800 (1394B), Serial ATA external disk drives, Solid-state drives, Wireless network interface cards, TV tuner cards, soundcards, additional memory and memory card readers, among other things.


Form factors:
ExpressCard supports two form factors, ExpressCard/34 (34 mm wide) and ExpressCard/54 (54 mm wide, in an L-shape) — the connector is the same on both (width 34 mm). Standard cards are 75 mm long (10.6 mm shorter than CardBus) and 5 mm thick, but may be thicker on sections that extend outside the standard form — for antennas, sockets, etc. The 34 mm form factor cards fit into both 34 mm and 54 mm card slots via a diagonal guide in the rear of the 54 mm slot that guides the card to the connector. The 54 mm card will fit in only a 54 mm slot.

For more information please visit : www.oempcworld.com

Friday, October 17, 2008

SODIMM memory



A SO-DIMM, or small outline dual in-line memory module, is a type of computer memory integrated circuit.SO-DIMMs are mainly used in notebooks, small footprint PCs (such as those with a Mini-ITX motherboard), high-end upgradable office printers, and networking hardware like routers.

SO-DIMMs have 72, 100, 144, or 200 pins. The 100 pin package supports 32-bit data transfer, while the 144 and 200 package supports 64-bit data transfer. This compares to regular DIMMs that have 168, 184, or 240 pins, all supporting 64-bit data transfer.

100-pin SO-DIMMs have two notches, 144-pin SO-DIMMs have a single notch near (but not at) the center, and 200-pin SO-DIMMs have a single notch nearer to one side.


SO-DIMMs are more or less equal in power and voltage rating to DIMMs, and as memory technology moves forward, both SO-DIMMs and DIMMs are available in equal speed (clock speeds such as 400Mhz PC3200, for example, and CAS latency such as 2.0, 2.5, and 3.0) and capacity (512MB, 1GB, etc.). More recent DDR2 SO-DIMM memory modules have clock speeds up to 800 MHz PC6400 and modules will soon be available with speeds of 1066 MHz PC8500.

SO-DIMMS are useful to design systems which have space restrictions and fit into small Form Factor systems/PCs.

Buy SODIMM Memory from : www.oempcworld.com

Thursday, October 16, 2008

MS Micro M2 memory sticks


MS Micro M2 memory sticks memory

Sony memory stick micro M2 is a new ultra small memory card designed to meet the growing storage needs of highly compact, multifunctional Sony Ericsson’s new generation of slim line, multimedia mobile phones needing expandable storage for music, videos, and quality photos. The advantage of the M2 is compatibility with all M2 slotted mobile phones as well as all Memory Stick PRO Duo slotted devices when accompanied with the included M2 adapter.The Sony memory stick micro M2 is approximately one quarter the size of memory stick PRO Duo media, but only 1.2 mm thick and because it is a dual voltage card it can be used with both mobile phones (1.8 volts) and memory stick PRO compatible products operating at 3.3 volts. Compatibility with memory stick PRO devices is via use of the supplied micro M2 adapter.

The memory stick micro M2 offers improved durability and reliability and works perfectly in temperatures from -25C to 85C. The M2 card enables high resolution moving image recording due to minimum write speed guarantee of 15 Mbps.

Features:
  • Includes Memory Stick PRO Duo adapter for universal compatibility with M2 slots and Memory Stick PRO Duo slots
  • Dual voltage operation; 1.8v for new Sony Ericsson mobile phones, 3.3v for Memory Stick PRO Duo compatible devices
  • Controlled ejection design allows for easier removal
  • Sony Magicgate encryption technology support


MS Micro M2 memory sticks memory compatible with:
Sony: PlayStation 3
Sony Ericsson: K530i, K550i, K610i, K630i, K660i, K770i, K790i, K800i, K810i, K850i, M600i, P1i, SE S500i, T650i, V630, V640i, W200i, W300i, W380i, W580i, W610i, W660i, W710i, W880i, W890i, W910i, Z530i, Z550i, Z558i, Z610i, Z710i


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Wednesday, October 15, 2008

SIMM Memory

O E M P C W O R L D- The world's memory value leader


SIMM (Single In-Line Memory Module)

A SIMM (single in-line memory module) is a module containing one or several random access memory (RAM) chips on a small circuit board with PINs that connect to the computer motherboard. This is an older type of computer memory.Since the more RAM your computer has, the less frequently it will need to access your secondary storage (for example, hard disk or CD-ROM), PC owners sometimes expand RAM by installing additional SIMMs. SIMMs typically come with a 32 data bit (36 bits counting parity bits) path to the computer that requires a 72-pin connector. SIMMs usually come in memory chip multiples of four megabytes.Sometimes you can get away with installing SIMMS, but they have to be installed in pairs.

The memory chips on a SIMM are typically dynamic RAM (DRAM) chips. An improved form of RAM called Synchronous DRAM (SDRAM) can also be used. Since SDRAM provides a 64 data bit path, it requires at least two SIMMs or a dual in-line memory module (DIMM).


72 pin SIMM memory Categories:


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Tuesday, October 14, 2008

miniSD memory cards




The miniSD Card is a small form factor removable and portable memory device intended for use in cell phones/mobile phones, digital cameras, MP3 players and many other gadgets.
In a March 13, 2003 press release, SanDisk Corporation announced the introduction of the miniSD and demonstrated it at CeBIT 2003.

The miniSD card was adopted in 2003 by the SD Association as an ultra-small form factor extension to the SD card standard. While the new cards were designed especially for use in mobile phones, they are usually packaged with a miniSD adapter which enables compatibility with all devices equipped with a standard SD Memory Card slot.

The miniSD card is made by several different manufacturers and comes in different brand names. Its compatibility is universal.The miniSD card is often confused with the microSD card which is another, smaller, SD derivation. The microSD card may be used in miniSD devices through use of an adapter, but miniSD cards cannot be used in microSD devices since they are larger than a microSD slot.The miniSD card is currently produced in capacities ranging from 16 MB to 8GB (miniSD) and 4GB to 6GB.

Features :

  • The MiniSD Card, a thumb sized flash memory card, offers the best features of SD but in smaller physical form factor.
  • New capabilities in 2.5G and 3G mobile phones including built-in digital still cameras, content downloading, and games are dramatically increasing the requirements for data storage and creating the need for removable storage.
  • The miniSD Card meets this need by providing the functionality of a standard SD Card in the ultra small form factor required by mobile phones.
  • The MiniSD SECURE DIGITAL memory card is available in capacities from 128MB to 4GB and is compatible with portable computing devices, digital cameras, cellular phones, voice recorders and MP3 players.
  • This MiniSD Secure Digital SD Card is the perfect storage device for Digital Cameras, Cell Phone,MP3 Players, PDA's, etc. It is of perfect quality.
  • MiniSD Secure Digital (SD) is the fastest growing category of flash memory cards due to its widespread use in digital cameras, digital camcorders, PDAs, handheld PCs and mobile phones, the SD cards will surpass Compact Flash and become the most popular flash memory card .
  • These MiniSD cards are manufactured to SD Card specifications and are compatible with digital devices that use Secure Digital.
www.oempcworld.com

Monday, October 13, 2008

XD Picture Card


64MB xD Picture Card S Type:

The xD-Picture Card is a type of flash memory card, used mainly in digital cameras. xD originally stood for extreme Digital.[1] The cards were developed by Olympus and Fujifilm, and introduced into the market in July 2002. Toshiba Corporation and Samsung Electronics manufacture the cards for Olympus and Fujifilm. xD cards are now sold under other brands, including Kodak, SanDisk, PNY, and Lexar, but are not branded with the respective companies' logos, except for Kodak.

xD cards are used in Olympus and Fujifilm digital cameras and Olympus digital voice recorders; Fujifilm also made an MP3 player (xD-MP3) that used the cards. As of 2008, xD cards are available in capacities of 16 MB (16 MiB), 32 MB, 64 MB, 128 MB, 256 MB, 512 MB, 1 GB (1 GiB) and 2 GB.


Specification:

  • 64MB storage capacity
  • Panorama function
  • Ultra-compact
  • Fast read/write speeds

This model comes with the following accessories:

  • Standard Box
  • xD-Picture Card
  • xD-Picture Card Holder



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Friday, October 10, 2008

CF CompactFlash memory cards


CF CompactFlash memory cards:

CompactFlash is a popular, movable mass storage device. The card is compatible with all devices that feature a CompactFlash slot. The perfect solution for securing all your storage and transfer requirements.Compact Flash is the world's most popular type of digital camera memory. A Compact Flash card is about the size of a matchbook and only weighs half an ounce. Compact Flash was designed based on the popular PC Card (PCMCIA) standard and can easily be slipped into these slots with the use of a low-cost adapter. Compact Flash technology has resulted in the introduction of a new class of advanced, small, lightweight, low-power mobile products including digital cameras, digital music players, desktop computers, handheld PCs (HPCs), personal communicators, Palm PCs, Auto PCs, digital voice recorders and photo printers. We stock all leading brands and ranges, including Sandisk, Sandisk Extreme V, Sandisk Extreme VI, SanDisk Extreme III, Kingston Elite PRO, Lexar UDMA 300X Professional. Please use our Memory Selector or check your manual to ensure compatibility.


Features/benefits:

  • Capacities* – 256MB, 512MB, 1GB, 2GB
  • Dimensions – 1.43'' x 1.68'' x 0.13'' (36.4mm x 42.8mm x 3.3mm) - CF Type
  • Speed** – 3.7 - 6MB/sec. read rate
  • 1.5 - 5MB/sec. write rate
  • Operating Temperature – 0o to 60o C / 32o to 140o F
  • Storage Temperature – -20o to 85o C / -4o to 185o F
  • Voltage – 3.3v / 5v
  • Standardized – complies with CompactFlash Association specification standards
  • Small – one-third the size of a full-size PC card
  • Easy – plug-and-play
  • Guaranteed – lifetime warranty ‡
  • Versatile – compatible with PC Card Type II adapters
  • Economical – autosleep mode preserves system battery life
Buy More Flash Memory from : www.oempcworld.com

Thursday, October 9, 2008

OEMPCWORLD



What we do:

OEMPCWorld.com sells oem computer memory and Flash memory products at wholesale prices for PCs, Macs, Laptops, Music Samplers, printers, cameras and more. We offer a wide variety of popular and hard to find older 72p pin SIMMs, 168 pin DIMMs and 184 pin Rambus modules at unbelievably low prices as well as the latest DDR, DDR2 and DDR3 modules. From 16Mb to over 4.0GB, we have it in stock and ready to ship. Wide selection, great prices, unmatched service.

Why OEMPCWorld
Founded in 1998 OEMPCWorld.com can make claim to offering the best value on the market for configurator guaranteed memory. Its founders have been in the computer memory business since the very first IBM PC had 64K of ram back in 1984.

Some companies offer lower priced items but when you use their configurator they point you to a much more expensive option. This is called bait and switch. Offer low priced items on the shopping comparison sites but when you use the configurator it does not list these low priced items as compatible and they tell you to buy the higher priced item for guaranteed compatibility. We don't do that (assuming of course you are using our configurator). All our items are offered at one low price and the product we carry is guaranteed compatible or your money back. We do not offer multiple tiers or varying grades of products, that concept is absurd. Our products are guaranteed compatible and have a lifetime warranty; all products offer high value and the highest grade possible.

We also offer some of the highest levels of customer service and customer satisfaction numbers in the industry - customers rate our overall service at better than 9.3 out of 10 (see Bizrate)and 99.6% of our customer are either completely satisfied or very satisfied (based on 35 000 customer ratings since 1999). Our returns processing averages 4.5 days from receipt to ship, the industry average is 12 days.
Many competitors charge 15% restocking fees if the configurator is not used and if you do use the configurator then you pay for the higher priced item. They also charge a higher fee if you order over the phone or limit your free shipping options.

In addition, we offer excellent value across all our product lines, not just the new products, we still sell 32MB EDO SIMMs for the same price we sold them for 5 years ago, everyone sells new items like DDR and DDR2 for low prices and then if you need PC100 you pay twice what we charge.

High value across the entire product line.

We offer Lifetime Warranty on all memory products and ALWAYS offer an unconditional 30 day money back guarantee with no restocking fees.

Customer Service is available during the indicated hours at (408) 350-0341.

OEMPCWorld.com
2800 Bowers Ave
Santa Clara CA 95051
Tel: (408) 350-0341
Fax:(408) 521-1888


Live Chat



Wednesday, October 8, 2008

128MB 100 pin SODIMM


128MB 100 pin SODIMM C9121A (ABO)

oempcworld is a specialist in memory modules in SIMM, DIMM, SO-DIMM, Rambus RIMM and custom form factors that utilize the latest DRAM, SRAM and Flash memory technologies.

128MB 100 pin SODIMM provide maximum power, speed, quality and reliability. They allow users to maximize system performance resulting in quicker document rendering, faster Internet downloads, quicker saves and loads and rapid game play. Additional memory allows you to open more applications simultaneously while providing the power needed to make them run quickly.

It boosts the performance of your system allowing you to work faster and reap enhanced performance of up-to-date applications and operating systems. Plug-in this memory module and you will notice that everything starts working smoothly.

Edge memory upgrades are the fastest way to upgrade your computer system and are perfect for virtually every comp.


Buy more memory from : www.oempcworld.com

Tuesday, October 7, 2008

Secure Digital (SD) Memory Cards


Secure Digital (SD) Memory Cards


The Secure Digital (SD) Memory Card is a highly-sophisticated memory device about the size of a postage stamp. SD Memory Cards are non-volatile, which means they do not require power to retain the information stored on them. They are solid-state devices, so they have no moving parts to skip or break down. We offer Secure Digital Flash Memory Cards that offer an incredible combination of high storage capacity, fast data transfer, great flexibility and excellent security, incredibly small size. And of course, deeply discounted sale price from OpticsPlanet.com.

SD (Secure Digital) Memory cards are next generation memory devices that offer a combination of high storage capacity, fast data transfer rates, great flexibility and excellent security, all in a memory card about the size of a postage stamp.


Secure Digital (SD) Memory Card Applications:

* Digital Cameras
* Digital Camcorder
* Internet Music Players / Recorders
* Audio Player
* PDA
* Digital Voice Recorders
* Electronic Books
* Global Positioning Systems
* Cellular Phones
* Digital TV
* Digital Projectors
* Digital Photo Printers


Buy more memory from : www.oempcworld.com

Monday, October 6, 2008

168-pin DIMM Memory

168-pin DIMM Memory

They contain 168 pins on the bottom of the circuit board. There are two notches on the bottom of the board and they must be aligned properly in order for them to be inserted. These memory modules are primarily used in newer computers and can be inserted one at a time unlike the SIMMs, which have to be inserted in pairs.

168-pin DIMMs are found in Pentium and Athlon systems. Each 168-pin DIMM provides a 64-bit data path, so they are installed alone in 64-bit systems. 168-pin DIMMs are available in FPM, EDO, PC66, PC100 and PC133.

The number of chips on a 168-pin DIMM may vary, but they have 84 pins on the front and 84 pins on the back for a total of 168. 168-pin DIMMs are 5.375" long and 1.375" high, and the heights may vary. They have two small notches within the row of pins along the bottom of the module.

Buy more memory fromwww.oempcworld.com

Friday, October 3, 2008

USB flash memory pen drive


USB flash memory pen drive


USB flash memory pen drive is a data storage device integrated with a USB (universal serial bus) interface. USB flash drives are typically removable and rewritable, much shorter than a floppy disk (1 to 4 inches or 2.5 to 10 cm), and weigh less than 2 ounces (60 g). Storage capacities typically range from 64 MB to 64 GB[1] with steady improvements in size and price per gigabyte. Some allow 1 million write or erase cycles[2][3] and have 10-year data retention,[4] connected by USB 1.1 or USB 2.0. USB Memory card readers are also available, whereby rather than being built-in, the memory is a removable flash memory card housed in what is otherwise a regular USB flash drive, as described below.

USB flash drives offer potential advantages over other portable storage devices, particularly the floppy disk. They are more compact, faster, hold much more data, have a more durable design, and are more reliable for lack of moving parts. Additionally, it has become increasingly common for computers to ship without floppy disk drives. USB ports, on the other hand, appear on almost every current mainstream PC and laptop. These types of drives use the USB mass storage standard, supported natively by modern operating systems such as Windows, Mac OS X, Linux, and other Unix-like systems. USB drives with USB 2.0 support can also be faster than an optical disc drive, while storing a larger amount of data in a much smaller space.


Specifications

  • Available in 128MB / 256MB / 512MB / 1GB / 2GB
  • Dimensions: 53mm x 18mm x 8mm (L x W x D)
  • Compatible with USB specification 2.0 and 1.1
  • No external power is required - DC 4.5V ~ 5.5V from USB port
  • Durable solid-state data retention for at least 10 years
  • Read Speed: 14.0 MB/sec
  • Write Speed: 7.0 MB/sec
System Requirements

  • Support of Windows XP / 2000 / ME without device driver
  • Support of Linux Kernel 2.4.10 and higher without device driver
  • Support of Mac OS 8.6 and higher without device driver
  • Support of Windows 98 / SE with device driver needed

Visit to buy more memory : www.oempcworld.com

Thursday, October 2, 2008

Rambus RDRAM memory


Rambus RDRAM memory

Direct Rambus DRAM or DRDRAM (sometimes just called Rambus DRAM or RDRAM) is a type of synchronous dynamic RAM, designed by the Rambus Corporation.

Rambus Dynamic RAM memory technology, was intended to replace SDRAM and challenge DDR SDRAM as the standard memory used in computers. The first PC motherboards with support for RDRAM debuted in 1999. They supported PC800 RDRAM, which operated at 400 MHz but presented data on both rise and fall of clock cycle resulting in effectively 800 MHz, and delivered 1600 MB/s of bandwidth over a 16-bit bus using a 184-pin RIMM form factor. This was significantly faster than the previous standard, PC133 SDRAM, which operated at 133 MHz and delivered 1066 MB/s of bandwidth over a 64-bit bus using a 168-pin DIMM form factor.

Some downsides of RDRAM technology, however, included significantly increased latency, heat output, manufacturing complexity, and cost. PC800 RDRAM operated with a latency of 45 ns, compared to only 7.5 ns for PC133 SDRAM. RDRAM memory chips also put out significantly more heat than SDRAM chips, necessitating heatsinks on all RIMM devices. RDRAM also includes a memory controller on each memory chip, significantly increasing manufacturing complexity compared to SDRAM, which used a single memory controller located on the northbridge chipset. RDRAM was also two to three times the price of PC133 SDRAM due to manufacturing costs, license fees and other market factors. DDR SDRAM, introduced in 2000, operated at an effective clockspeed of 266 MHz and delivered 2100 MB/s over a 64-bit bus using a 184-pin DIMM form factor.

With the introduction of the i840 chipset, Intel added support for dual-channel PC800 RDRAM, doubling bandwidth to 3200 MB/s by increasing the bus width to 32-bit. This was followed in 2002 by the i850E chipset, which introduced PC1066 RDRAM, increasing total dual-channel bandwidth to 4200 MB/s. Also in 2002, Intel released the E7205 Granite Bay chipset, which introduced dual-channel DDR support for a total bandwidth of 4200 MB/s, but at a much lower latency than competing RDRAM. In 2003, Intel released the i875P chipset, and along with it dual-channel DDR400. With a total bandwidth of 6400 MB/s, it marked the end of RDRAM as a technology with competitive performance.

Rambus survived the obsolescence of RDRAM and moved to support DDR and DDR2 in the area of video card technology and in particular, PCI-E. Rambus also developed and licensed its XDR RAM technology.



Buy more Rambus RDRAM from:www.oempcworld.com

Wednesday, October 1, 2008

MMC Mobile memory card


MMC Mobile memory card

MMC Mobile card is a reduced-sized MMC flash memory card with enhanced features specifically designed for use with mobile phones requiring low voltage and high-speed data transfer for the internal RS-MMC size memory card slot.


Features:

  • Integral MMC mobile cards are perfect for storing data from the latest mobile phones
  • MMC mobile has an extremely small form factor of 24mm x18mm x1.4mm, specifically designed to work best in mobile phones as it is space saving in size and uses a tiny amount of battery power
  • MMC mobile is a dual voltage product, operating at both 1.65-1.95V and 2.7-3.6V ranges
  • MMC mobile is fully backwards compatible with RSMMC (Reduced Size Multi Media Card) and Dual Voltage RSMMC
  • Operating at 52 MHz in x8bit mode, data can be transferred at up to 52MB/sec, (or 416 bits/sec)
  • Along with its sister format MMC plus, this is the highest data transfer rate of all existing memory card standards available today.
  • With the use of an adaptor, which Integral supply with all MMC mobile cards, MMC mobile can be made full-size and work as a standard Multi Media Card/ MMC plus in many other devices such as digital cameras, MP3 players, navigation systems and PDA's.
  • Your mobile phone will be able to store more images, ringtones, mp3s and movie clips then ever before.
  • Available in 4 Sizes: 128MB,256MB,512MB , 1GB

Visit for more information : www.oempcworld.com