PCMCIA ATA flash memory cards

PCMCIA ATA flash memory cards

PCMCIA ATA Flash Cards combine advanced Flash controller technology and NAND Type SLC flash memory.

The PCMCIA ATA Flash Card come with commercial (standard) operating temperature level (0°C ~ +70°C) and industrial operating temperature lever ( -40°C ~ +65°C) to fulfill various specialized applications in normal or harsh operating environments.

PCMCIA ATA Flash Card is ideal solutions for critical applications which request for long term supply with consistent key components.

System Features

• Enhanced ATA/CF Flash Controller and built-in NAND Type SLC Flash Memory Chip
• PCMCIA Version 2.1/JEIDA 4.1 Compliant
• ATA/True IDE Mode compatible
• Very low power consumption
• A high reliability based on the internal ECC function
• Supports power down commands and Auto Stand-by / Sleep Mode
• +5V ±10% or 3,3 V ±5% operation
• Wear-leveling Algorithm supported
• MTBF > 1,000,000 hours (about 114.15 years)
• Writing/Erasing cycles> 1,000,000 times (logically)
• Minimum 10,000 insertions
• Support OS Windows 31/95/98/Me. Windows NT/2000/XP/2003/Vista, WinCE, QNX, Linux, DOS and more
• Capacity: 16MB, 32MB, 64MB, 128M8, 256MB, 512 MB, 1GB, 2GB, 4GB.(unformatted)

For more detail please visit : www.oempcworld.com

Is Cheap RAM still high Quality?

When looking for memory for your computer, there are several factors to deciding the right RAM, but two things tend to stand out - price and quality. While it might seem that to get great quality you also have to pay a great deal of money, but it is possible to find cheap RAM without compromising on quality.

Quality doesn't mean that the RAM itself is brand name, from Crucial or Kingston or OCZ or Corsair, but that the memory chips used in the RAM comes from a high-quality manufacturer, such as Infineon, Micron, Elpida, and Samsung among others. By finding cheap RAM that has been made by high quality manufacturers such as these, you can avoid paying a price premium for retail packaging and brand names.

These manufacturers are the same ones used by OEMs- Original Equipment Manufacturers, such as Dell, HP, Compaq, and more for their memory needs. By buying RAM in large quantities and not having to pay for retail packaging or branding, this memory is available at a cheaper price than ram you’ll find at your local computer shop or box store. OEMPCWorld.com offers high quality OEM ram at discount prices.

Our RAM covers all types of memory, from DDR and DDR2 memory for desktops to laptop RAM for new and older laptops alike. We also carry the specific models of RAM needed for Apple computers, including the G3 series that Apple itself no longer sells memory upgrades for on their website. This RAM is checked to make sure it will work correctly with your Apple computer's model. We offer a lifetime warranty on our RAM, as well as a 30-day money back guarantee if you are not satisfied.

If you're curious or don't know what sort of RAM your computer uses, take a look at the memory selection utility below. Click 'Check Your System' if you're browsing our site from the computer you plan to upgrade, and our tool will check your system and report back what RAM you currently have installed, the maximum amount of RAM your system can take, and possible upgrades for your system.

If you know the model of your computer, enter it in the model field and you can find the same information about your system, including exact information about what amount of RAM you currently have installed. Otherwise, if you built your computer yourself or are just curious, take a look at the RAM listings on the left. We have plenty of different types of RAM to choose from, as well as flash memory for PDAs, cellphones, cameras and other devices.

If you’re not convinced cheap ram can be just as good as brand-name ram, read about OEM products

Flash Memory Options

Flash Memory comes in a lot of different formats for a lot of different purposes. It can be used for everything from PDAs to cell phones, from holding pictures on cameras to pen drives that let you carry your documents more easily. The reason for the popularity of flash memory is its great storage in a small size, as well as the durability of the media. Flash media is more capable of surviving falling, being stepped on, or even having liquids splashed on it then film rolls and hard disks.

What types of flash memory are available? The most popular types include Compact Flash, Secure Digital, and Sony’s Memory Stick Pro. Compact Flash is most often used in personal cameras, and comes in sizes ranging from 32MB up to 8GB. Having a 1GB Compact Flash cards in your camera has become very common, enabling you to take photos all day without worrying about filling your card.

Secure Digital, or SD memory, is a much smaller format then Compact Flash, which makes it perfect for cell phones and PDAs where space is at a premium. At the same time, the tiny cards can carry nearly as much data as the larger Compact Flash cards. A 2GB Secure Digital flash memory can cost less than $20, allowing plenty of storage for your PDA or cell phone.

Memory Stick Pro is used in both cameras and the PSP portable gaming system. This Sony Brand memory tends to cost a bit more then Compact Flash and Secure Digital per megabyte, but is proprietary in a number of Sony produced devices.

Finally, there are also USB flash memory drives available, ranging from 64MB all the way up to 16GB drives. A 1GB drive can carry around more data then a CD can, and can be written and re-written to over and over again.

So if you're looking for flash memory for your camera, cell phone, PDA or PSP, take a look at what we have to offer. We also have Smart Media, MultiMedia and XD Picture Cards available for you to browse through.

What is DDR3 Memory?

Several major DRAM manufacturer have made announcement, they are supplying the industry's first DDR3 devices and modules to leading PC industry developers for

evaluation by early 2007. Intel’s Bearlake chipset will be the first to support DDR3 and it is expected to arrive in the third quarter of 2007

Key Features

• The DDR3 components are twice as fast as today's highest speed DDR2 memory products.
• The first computer systems equipped with the advanced DDR3 memory technology are expected to arrive in 2007.
• The main advantages of DDR3 are the higher bandwidth and the increase in performance at low power.
• The DDR3 SDRAM devices will offer data transfer rates up to 1600 Mbps (megabits per second).
• The supply voltage for the memory technology is being reduced from 1.8 volts for DDR2 to just 1.5 volts for DDR3 targeting a work day equivalent of battery time. The

voltage reduction limits the amount of power that is consumed and heat that is generated in connection with the increase in bandwidths.

Component densities: standardized from 512Mbit thru 8Gbit.
The most important densities will be 512Mbit and 1Gbit at the beginning, later on a 2Gbit and eventually 4Gbit component to follow.

Module densities: from 256MByte up to 8GByte for standard JEDEC modules.
Higher module densities beyond 8Gbyte for special applications like servers may be introduced later on.

Features:

DDR3 SDRAM Components:

• Introduction of asynchronous RESET pin
• Support of system level flight time compensation
• On-DIMM Mirror friendly DRAM ballout
• Introduction of CWL (CAS Write Latency) per speed bin
• On-die IO calibration engine

What Types of PC Memory are There to Choose From?

What Types of PC Memory are There to Choose From?

So you're looking for PC memory to upgrade your system with, but aren't quite sure what you're looking for. Hopefully we can help you with some information about the various types of memory that are available to choose from.

The first type of memory to see widespread use is the 72-pin SIMM(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=72pin). Unlike the 30-pin SIMM that preceded it, the 72-pin version had a 32-bit data bus, requiring only one or two memory modules to fill the system's data bus, as opposed to the four or eight 30-pin SIMMs that had been required before that. The 72-pin SIMM these days will need to be installed in pairs, as almost all systems have a 64-bit data bus, and come in sizes ranging from 8MB to 128MB of memory. So if you want to add only 128MB of PC memory to your system, remember to get two 64MB memory modules(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=64M-EDO). Otherwise, make sure what type of 72-pin SIMM you need, as there are two formats - FPM (Fast Page Mode) and EDO (Extended Data Out), and not all motherboards will work with both types, not to mention that you will need to make sure that if you are adding RAM to your system, you install the same type as is already being used.

The replacement for the 72-pin SIMM PC memory is the 168-pin SDRAM(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=168pin). The 168-pin SDRAM has a few advantages over the 72-pin SIMM, but the greatest advantage is the 64-bit data bus used by the memory. This means that each module communicates with the system's data bus without needing to pair memory together, and allows for upgrading the memory one piece at a time. In addition, SDRAM operates at a higher speed then 72-pin SIMMs, operating at 66MHz(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=PC66), 100MHz(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=PC100) or 133MHz(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=PC133). The size of memory available in 168-pin SDRAM varies widely, from 32MB(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=32M-PC100) up to 1GB(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=1.0G-PC133) modules. The most common sizes in use these days are 256MB(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=256M-AP133) and 512MB(http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=512M-PC133).

PC100 vs PC66

PC100 vs PC66

Use only PC66 Memory in TX and LX systems requiring 4 clock RAM Intel
Ver 1.0 Compliant. Do not use for VX systems. Specially made SDRAM
modules are required for VX systems.
Using the wrong memory speed in a system has a number of problems
associated with it, the first being it may not work. If the slower
memory does work in your faster machine then you have slowed down the
entire system and defeated the purpose of the new machine. For maximum
performance and cost effectiveness only use the correct memory per the
system specifications.

In an effort to answer some of the many questions regarding the "New"
PC100 bus memory I have assembled this white paper. I will focus only on
the differences and try to avoid a technical paper on how it works. The
paper is broken down into two parts with the first being the physical
differences between the two types of memory modules. The second part
deals with the systems issues with PC100 and PC66.

Physical Similarities and Differences
Intel created both the specifications for the PC66 and the PC100 SDRAM
DIMMs which tightly define their electrical characteristics. Both the
PC100 and PC66 SDRAM modules are 168 pin, 3.3 volt DIMM with SPD "Serial
Presence Detect". The signal pinouts or where the signal pins on the
connectors' locations is the same for both types of modules.

Both start out with the same basic concepts and similar physical
appearances but both are really quite different from performance
aspects. On the module itself, the PC100 specification requires that the
length of the traces be kept shorter than the PC66 modules. The shorter
the traces the faster the electrical signals can travel on and off the
module. The routing of the traces on the PC100, because they need to be
kept shorter, have to use a 6 layer PCB as
compared to a 4 layer PCB used on the PC66.

What is EDO Memory?

Extended Data-Out (EDO) is a DRAM chip technology which improves memory performance 10 to 15% over equivalent Fast Page Mode devices.

Computer systems must be designed to take advantage of this performance increase EDO offers.

Intel's Triton Chip set, used in Pentium-class computers, are designed to do just that. EDO memory may be installed into most other computer systems but they will function and perform
as a Fast Page Mode memory module.

How does EDO Work?
DRAM's are designed as a matrix of bits. Each bit is accessed by a row and column address. A memory controller inside a computer system provides those addresses to access the data that each bit contains.

A 60ns DRAM will provide that data to the memory controller within 60ns. But there are certain time constraints for the memory controller to set-up the addresses, receive the data, and prepare for the next cycle. An entire memory cycle can range from 85 to 120ns.

Fast Page Mode can decrease cycle times by allowing the memory controller to access other data bits which are in the same row address. This saves time by not having to set up the next row address instruction. Data accessed in the same row is referred to as a "page".

Extended Data-Out (EDO) can improve cycle times even further by allowing the memory controller to begin a new column address instruction while it is reading data at the current address. Unlike FPM, the data output drivers are not turned off when the memory controller removes the column address to begin the next cycle. This saves approximately 10ns per cycle.