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Product Description

Item # 

SDRAM PC100

Price

 

256MB PC100 SDRAM Infinion Chipset Memory

 1-Year Warranty From SPC Computers

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M-256/PC100

 

$ 68.00

 

SDRAM PC133

Item #

Price

 

128MB PC133 SDRAM Memory

 1-Year Warranty From SPC Computers

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M-128/PC133-S4

 

$ 37.00

PC2100

Item #

Price

 

128MB DDR/266 PC2100 Memory

  1-Year Warranty From SPC Computers

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M-128/266-S4

 

$ 30.00

 

  DDR2 & PC2700

Item #

Price

 

256MB DDR/333 DIMM PC2700 Memory

  1-Year Warranty From SPC Computers

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M-256/333-SAM

 

$ 44.00

 

256MB PC2700 DDR/533 SODIMM

  1-Year Warranty From SPC Computers

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M-1G/SO533-APA

 

$ 43.00

 

256MB PC2700 DDR/333 SODIMM

  1-Year Warranty From SPC Computers

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M-1G/SO333-APA

 

$ 44.00

 

256MB DDR2/533 DIMM PC2700 Memory

  1-Year Warranty From SPC Computers

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M-256/533-APA

 

$ 50.00

 

1GB DDR/333 DIMM PC2700 ECC Memory

  1-Year Warranty From SPC Computers

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M-1G/333-ECRG

 

$ 187.00

  PC3200

Item #

Price

 

256MB DDR/400 DIMM PC3200 2.5V Samsung Chipset 32X8 Intel Certified Memory

  1-Year Warranty From SPC Computers

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M-256/400-SAM

 

$ 38.00

 

256MB DDR/400 DIMM PC3200 Infinion Chipset Memory

  1-Year Warranty From SPC Computers

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M-256/400-SIE

 

$ 41.00

 

512MB DDR/400 DIMM PC3200 Infineon Chipset 32X8 Memory

  1-Year Warranty From SPC Computers

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M-512/400-SIE

 

$ 75.00

 

512MB DDR2/400 DIMM PC3200 ECC Memory

  1-Year Warranty From SPC Computers

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M-512/400D2-ECR

 

$ 103.00

 

512MB PC3200 DDR/400 SODIMM

  1-Year Warranty From SPC Computers

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M-512/SO400-MOS

 

$ 76.00

 

1GB PC3200 DDR/400 SODIMM

  1-Year Warranty From SPC Computers

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M-1G/SO400-APA

 

$ 181.00

 

1GB PC3200 DDR/400 ECC Memory

  1-Year Warranty From SPC Computers

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M-1G/400-ECRG

 

$ 187.00

 

1GB PC3200 DDR/400 Memory 

  1-Year Warranty From SPC Computers

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M-1G/400

 

$ 147.00

  DDR2 PC4300 & SODIMM

Item #

Price

 

512GB PC2-4200/4300 DDR2/533 SODIMM Samsung Chipset Memory 

  1-Year Warranty From SPC Computers

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M-512/SO533-ELP

 

$ 87.00

 

512GB PC2-4200/4300 DDR2/533 Memory 

  1-Year Warranty From SPC Computers

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M-512/533-APA

 

$ 71.00

 

 

1GB PC4200 DDR/533 SODIMM Memory

  1-Year Warranty From SPC Computers

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M-1G/SO533-APA

 

$ 148.00

  PC133 SODIMM

Item #

Price

 

  ValueRam, KVR133x64 SC3, 512MB, PC133, SODIMM Memory

  1-Year Warranty From SPC Computers

    Lifetime Warranty From Kingston

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M-512/SO133-MOR

 

$ 132.00

  DDR266 PC2100

Item #

Price

 

  ValueRAM KVR266x64C25 256MB     DDR/266 PC2100 Memory

  1-Year Warranty From SPC Computers

                              Lifetime Warranty From Kingston

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M-256/266-KVR

$ 51.00

 

 

  ValueRam, KVR266x64C25, 512MB, DDR266/PC2100 Memory

  1-Year Warranty From SPC Computers

                              Lifetime Warranty From Kingston

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M-512/266-KVR

 

$ 89.00

 

  PC2700

Item #

Price

 

  ValueRam, KVR333X64C25, 256MB, DDR/333 PC2700

  1-Year Warranty From SPC Computers

                              Lifetime Warranty From Kingston

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M-256/333-KVR

 

$ 52.00

 

 

  ValueRam KVR333x64 C25, 512MB, DDR/333 PC2700 Memory

  1-Year Warranty From SPC Computers

                              Lifetime Warranty From Kingston

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M-512/333-KVR

 

$ 89.00

 

  PC3200

Item #

Price

 

  ValueRam, KVR400x64C3, 256MB, DDR/400 PC3200, 32x64, CL3 Memory

  1-Year Warranty From SPC Computers

                              Lifetime Warranty From Kingston

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M-256/400-KVR

 

$ 55.00

  PC4200

Item #

Price

 

  1GB 533MHz DDR2 Non-ECC CL4 DIMM

  1-Year Warranty From SPC Computers

                              Lifetime Warranty From Kingston

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M-1G/533-KVR

 

$ 162.00

 

MORE INFORMATION ABOUT MEMORY

Do you need more memory?

Answer these questions to find out!

Has your system performance slowed to a crawl because you recently installed Microsoft Windows98, Windows2000, Windows ME! or WindowsXP

Have you upgraded to the latest version of your favorite program, only to spend more time watching the Windows hourglass than getting things done?

Does your system respond with "not enough memory" messages whenever you want to have two or more applications open at the same time?

Are you unable to use the most complete versions of the game on CD-ROM because your system lacks the required memory?

If you answered "YES!" To any of these questions, a memory upgrade is the key to boosting your computer's performance and your productivity!

How much RAM do I need?

A good general rule to follow in determining how much memory your computer needs is to add the minimum amounts of required RAM for each of the applications you'll want to have open at the same time.

How much memory is enough? The answer really depends on what you're doing with the PC;
RAM requirements can vary from system to system. The table below shows how much memory different operating systems require.

Operating System Required Memory Recommended Memory Best with Memory
Windows Vista 512MB 1GB 1GB or more
Windows XP 128MB 256MB 512MB or more
Windows 2000 64MB 128MB 512MB or more
Windows 98,Me 32MB 64MB 128MB or more
Windows 95 16MB 64MB 128MB or more
Windows 3.x 8MB 16MB 32MB or more
Mac OS 9.x 64MB 128MB 256MB or more
Mac OS 8.x 32MB 64MB 128MB or more
Macintosh OS 7.5.x 16MB 32MB 64MB or more
Macintosh 7.0-7.1 8MB 16MB 32MB or more
Linux 48MB to 64MB 128MB 512MB or more

You'll also need enough memory to load all the programs you want to run at any one time. Applications like Microsoft Word or Excel generally use about 32MB each, but you can check the system requirements listed on each application's box to determine the recommended RAM. If you want to run three applications simultaneously (say, Word, Internet Explorer, and Media Player), you'll need to add the RAM requirements for all three to your total. Finally, you'll need RAM for data files the open Word documents, Excel spread sheets, MPEGs , and so on. More complex work demands more RAM. For example, a simple document may require less than 1MB, but a database file may fill several megabytes, and a high-resolution photo scan or graphic design may demand 50MB or more.

Today's entry-level systems typically come with 128MB of RAM. But if you bring home from the office we recommend 256MB for true multitasking. Desktop publishers should consider a minimum of 64MB for advanced color publisher and multimedia. Call us for a memory upgrade now or E-mail us for the current pricing on memory SIMMS, DDR, SDRAM & RIMM. Memory prices change each week and sometimes twice a week depending on the market demand. We at SPC Computers want to give you the lowest prices when it comes to memory and that is why we try and keep memory prices as current as possible. 

What is EDO and FPM?

In the early years of the PC, FPM (Fast Page Mode) DRAM was usually the most common form of DRAM available for personal computers. The Page Mode process allowed for the accessing of information by providing a constant RAS (Row Address Strobe) signal while at the same time, allowing the CAS (Column Address Strobe) signal to maneuver to different locations. This process acquires data from columns sharing the same row, but without the need to constantly specify the row location in each access. By acquiring rows of information, or pages, in this manner, the operation resulted in a lower memory access time and a reduction in power consumption, an overall improvement over its predecessors.

EDO (Extended Data Out) devices proved to have a slight advantage over the FPM memories. Typical FPM devices would turn off their data output buffer at the rising edge of the CAS signal, so reading information would no longer be possible (Refer to DRAM Data Array diagram). EDO devices allow the read process to extend past the point of CAS going high. This process allowed for a slightly (~25%) more efficient memory device.

What is DDR Memory?

DDR (Double Data Rate DRAM) is similar to SDRAM, however, it improves its capability significantly in one aspect. SDRAM has the capability of transferring data at every rising edge of the clock signal. The transfer of data for DDR components can be performed at both edges of the clock signal. This allows a double rate of transmission speed enabling the device to operate at speeds twice that of typical SDRAM devices.

 Common DDR speeds are PC2700, PC2100 and PC1600, also known as PC-333, PC-266 and PC-200, which refer to the module's speed in MHz.

 400-MHz DDR faces an uncertain future. There is no official Jedec standard for 400-MHz DDR, and most industry experts expect the industry to shift production directly to DDR-II in 2004, avoiding production of 400-MHz DDR. DDR-II will support much higher frequencies, starting at 533-MHz.

What is Rambus (RDRAM) Memory?

Emerging in the memory market and possibly becoming a force in the industry is the RAMBUS (RDRAM) memory device. Named for RAMBUS® Inc., the maker of the product, and in partnership with Intel® Corporation, these devices promise to provide a 1.6 Gigabyte per second transfer rate on a narrow 16-bit bus (referred by the company as a RAMBUS channel). When grouping 4 of these RAMBUS channels together to conform to today's 64-bit wide bus, capabilities reach a transfer rate of 6.4 GB per second, with higher bandwidths planned in the years ahead.

They bear a resemblance to high-speed DDR devices in that data transfer occurs at both the rising and falling edges of the system clock. They work at an incredible 800MHz rate on a 400MHz system clock and also help cut down power by using a supply voltage of 2.5V. This not only reduces heat, but also assists in tempering noise interference. Nonetheless, as the environment involves such high frequencies, it is necessary for the modules to be placed very close to the CPU to avoid potential problems from noise.

What is DRAM?

DRAM, or Dynamic Random-Access Memory, is the medium that is used for the temporary storage of information by today's personal computers and mainframes.

Each DRAM component is comprised of numerous cells, or storage locations, made up of a capacitor and a transistor which can either hold an active or an inactive state. Each DRAM cell is referred to as a Bit (binary digit) and is commonly used to reference the smallest amount of information that a computer can work with. A DRAM's cell is said to hold a value of '1', an active state, when it holds a charge beyond a certain level. It is said to have '0', an inactive state, when the charge is below a certain level. Because of the nature of a capacitor, it is necessary to recharge, or refresh, the state in which the cell exists, as over time, the capacitor loses its charge (The loss of charge results in the loss of information).

DRAM cells are combined into a large array that is used to store vast amounts of information translated binaurally by computers. The DRAM elements are arranged in specific groups organized in terms of Rows and Columns, with each cell having a specific Row/Column reference (Address location).

What is SRAM (Static RAM) Memory?

SRAM (Static RAM) is an improved architecture of regular DRAM. Traditional DRAM is composed of a transistor and a capacitor which require periodic rewriting (refreshing) of information in order for data to remain valid. SRAM memory requires no refresh at all, it will maintain its information so long as it has sufficient power to keep it. This is due to the fact that internally, the SRAM component is made up of flip-flop circuitry, that does not depend on refreshing.

Unfortunately, it is because of this flip-flop circuitry (made up of four-six transistors) that the SRAM is larger in size and cannot compete with the densities found in DRAMs of today. The same density issue gives reason to the higher price for SRAMs.

A redeeming factor in SRAMs lies in their amazing speeds. Typical SRAM devices are much faster than traditional DRAM memory, and can therefore be used along side the processor as cache (temporarily hold data) while it performs other duties. Its speeds allow quicker accesses in comparison to DRAMs which must wait several processor clock cycles before providing the needed information.

What is FCRAM (Fast Cycle RAM) Memory?

FCRAM (Fast Cycle RAM) is a new technology developed by the Fujitsu Corporation that approaches the problem of DRAM/Processor speed in a different way. With the improvements in CPU speeds over the last few years, designers have looked for a solution that would get them over the ever present problem of relative slower memory.

 Traditionally, various technologies such as EDO and SDRAM have attacked the problem with enhanced logic circuitry and peripherals that accessed the DRAM core. This resulted in the small advances that we have seen lately, but these advances were only targeting the interface to the DRAM, nothing else.

 FCRAM, however, seeks to change the DRAM core itself. The process includes core segmentation and pipeline operation with the added benefit of power reduction. This new structure has introduced some significant advantages over traditional memory technology whose core has remained virtually unchanged in the last two decades. One such advantage will be the ability to send Row and Column information at the same time, as opposed to the standard sequential operation; in fact, a secondary command can be issued without needing to wait for the primary command to be completed. In combination with a DDR interface, this technology will speed performance significantly.

 Joining the venture will be Toshiba Electronic Components. Both groups hope to make a definite change in the industry by providing an ample supply and keeping close customer relations to optimize their products. They plan on targeting these devices to high graphics-based systems and multimedia applications where a true difference in speed can be recognized.

184-Pin DDR Memory Module Installation Guide

The instructions on this page provide general installation and handling information for 184-Pin DDR memory modules. These instructions are intended to be used in conjunction with your model specific owner's manual.

Note: Before touching electronic components, make sure you are properly grounded. By wearing a wrist strap (or using some other type of static control device), you can prevent static electricity stored on your body or clothing from damaging your installation. Anti-static straps are available for purchase from our Web site, alternatively please contact our sales department.

  1. The first thing to do is make sure the computer is shut down.

     

  2. Note that it may seem sensible to unplug the computer before installing the RAM, but we don't recommend it. Keeping the machine plugged in will ground it, and this is important because that way any static electricity built up in your body will be discharged before handling the RAM chips. You can do this by touching any metal part of the case. Frying a chip with static electricity is a rare occurrence, but still possible.

     

  3. Remove the computer's cover following the instructions in the model-specific owner's manual.

     

  4. Locate the memory expansion sockets on the computer's motherboard. If all the sockets are full, remove smaller capacity modules to allow room for higher capacity modules.

     

  5. Once you've discharged your static electricity, pick up the memory chip by its top or sides. Don't touch the silver or gold contacts at the bottom, because even a little oil from your finger can eventually interfere with the connection. Regardless of the type of memory you have, it will only go into the empty memory slot one way, so look at the notches in the contacts and line them up so the partitions in the RAM sockets fit in the grooves.

     

  6. Insert the module into an available expansion socket. Press the module into position, making certain the module is completely seated in the socket. The ejector tabs at each end of the socket will automatically snap into the locked position. Repeat this procedure for any additional modules you are installing. The ejector tabs shown in the illustration are used to remove a module. By pushing outward on the ejector tabs, the module will pop-up from the socket and it can then be removed.

     

  7. For most installations, DDR modules can be installed in any available expansion slot. Other installations may require the memory to be installed in a particular sequence based on the modules capacity. Check your owner's manual to determine the correct installation sequence for your configuration.

     

  8. Turn on the computer and follow the instructions in your computer owner's manual that describe the steps necessary to allow your computer to recognize the newly installed memory. (Most computers will automatically recognize the additional memory installed).
Technical Support:

Are you having trouble installing your new RAM?

Is your new memory not working?

Relax, here's some good news! Most of the time, when customers have trouble with their new memory, we find their problems can be easily solved by one of the following solutions.

Plug it in. Please double-check and make sure all your power cords are plugged in. You wouldn't be the first person this has happened to.

Press harder. Make sure the notches on your module are lined up with the keys in the slot, and then press down firmly. Don't be afraid that you are going to break it. It can sometimes take 20 to 30 pounds of pressure to install a module. The clips on the side of the module should snap into place on their own. If you have to move the clips into place by hand, your module isn't installed properly.

Install again. Even if you have inserted the module correctly and the clips are locked in place there is a chance the module may not be seated fully. Remove the memory module and try reinserting it. If a problem persists, remove all memory and try just the new memory by itself. If you have purchased more than one stick of memory make sure you try just one at a time, unless your machine requires them to be installed in pairs.

Update your BIOS. Some older machines just don't like to work with today's newer technology. If you have an older system, it may need a BIOS (Basic Input Output System) update. It's ok, this is much easier than it sounds. All you need to know is the manufacturer of your computer or motherboard and typically you can download the free bios software from their Web site.

Memory Glossary

Buffering Adding Logic, particularly drivers, to a SIMM or DIMM to increase the output current
Cache A small high speed memory device, (usually SRAM) located between the CPU and system DRAM used to temporarily store data. Properly designed, a cache improves system performance by reducing the need to access the system's main memory for every transaction. Cache memory can be three to five times faster than standard system DRAM.
Composite A term created by Apple Computer, Inc. that describes a memory module made up of many smaller DRAM devices, with additional bank controlling circuitry and perhaps buffers for the address and control signals.
CPU Central Processing Unit. The computer chip primarily in charge of retrieving, decoding and executing instructions.
DDR Double Data Rate. This is a competitor technology to RAMBUS.
DIMM Dual Inline Memory Modules. DIMMs are memory modules with data buses of 64, 72 or 80 bits.
DRAM Dynamic Random Access Memory.
ECC Error Correction Code, is an electronic method for checking the integrity of data stored in DRAM. ECC is more elaborate than parity since it can detect multiple bit errors and can locate and correct single bit errors. ECC usually uses three bits per byte of data, compared to one bit used on parity.
EDO Extended Data Output, A DRAM performance feature that speeds up the read cycle between the CPU and memory. Made for computers with a faster CPU, EDO memory is 10-15% faster than similar fast-page mode chips.
FPM Fast t Page Mode – Common DRAM data access mode that is similar to finding information in an encyclopedia. First, you turn to a specific page, then you select information from the page.
JEDEC Joint Electronic Device Engineering Council is the consortium of manufacturers that devises standards most notably for computer memory modules. Industry standard memory usually implies compliance with a particular group of JEDEC standards.
Nanosecond ns, One billionth of a second. Times for memory data access are measured in nanoseconds.
Non-Composite The term composite and non-composite refer to the number of chips used on a given module. Non-composite – achieve memory capacity with fewer chips. Composite – Requires more chips to achieve capacity.
Parity A method of data integrity checking that adds a single bit to each byte of data. The parity bit is responsible for checking for errors in the other 8 bits. Unlike ECC, parity only detects but doesn't correct errors.
PCMCIA Personal Computer Memory Card International Association, A created standard to allow interchangeability, of various computer components such as; memory, FAX/modem, SCSI, and networking products all on the same connector.
RAMBUS A company/developer of RDRAM memory products. These products have exceptionally high bandwidth. Rambus memory will only work in systems designed specifically for RAMBUS.
RDRAM Rambus Dynamic Random Access Memory. See Rambus.
SDRAM Synchronous Dynamic Random Access Memory, A DRAM designed to deliver bursts of data at very high speed using automatic addressing, multiple page interleaving, and a synchronous (or clocked) interface.
SIMM Single In-line memory Module are narrow printed circuit boards about three inches long that hold several memory chips. The module plugs into a SIMM socket on the main or expansion board of your computer or printer.
SOJ Small Outline J-lead is a common type of DRAM packaging. It has J-shaped leads on the two long sides of the chip.
SO DIMM Small Outline Dual Inline Memory Module, a Revised Version of standard DIMM.
TSOP Thin Small Outline Package is a type of DRAM package that is one third the thickness of an SOJ package. TSOP DRAMs are commonly used in SO DIMM and IC Card memory applications.

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These prices and products and availability are subject to change without notice! And will be updated on a weekly schedule if possible. If you want a current Price on any item Please E-mail us for the update. Everything thing that SPC Computers sells has a 1- year warranty and addition warranty from the manufacturer. If you are in the state of Michigan a 6% sales tax will be added to the price of the item that you requesting. All others will not be affected by this tax. There will be a shipping charge to you for items that are shipped to you. 

If you decide to return any products for any reason You have 5- working days to return the product from the date of purchase.

 There will be a 15% restocking fee and you will not get a refund back on the shipping charges.

Also if you are interested on a particular item and it's not listed on the web site, please E-mail us on what you are looking for and SPC Computers will E-mail you back with the price on the item. Not everything is listed on this web site.

Products and names appearing in the site may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation purposes.

Last Updated 1/1/07