This DDR3 DIMM can go in a current Mac Pro.

Some Macs, like many Xserves and Mac Pros, require RAM to be installed in two modules of the same size and specifications–check your manual to be sure. Others, including all Intel Macs, don’t require matched pairs, but will see some speed benefits with matched memory. But even in these machines, more unmatched memory (say, one 2GB module and a 1GB module for a total of 3GB) generally provides greater benefit than a smaller amount of matched RAM (say, two 1GB modules for a total of 2GB).


Ram Laptop DDRIII 2GB

$ 30



Ram Desktop DDRIII 2GB Silicon

$ 30



Ram Laptop DDRII 2GB

$ 30



Ram Desktop DDRII 1GB Silicon

$ 20



Ram Desktop DDRII 2GB Silicon

$ 30



This the latest type of RAM that uses magnetic charges instead of electrical. MRAM can hold data longer then both DRAM and SRAM.



There are three common types of computer RAM: DDR1, DDR2 and DDR3. They are not compatible with each other and have different notch sizes (see pic below), so you must have the correct type for your motherboard. This section talks about desktop computer DIMMs.

DDR1 / DDR RAM is still used in many older computers today – mostly Intel Pentium 4 / P4 (Socket 478) and AMD AthlonXP/64 based computers (Socket A/754/939). It is still a common upgrade used to speed up these PCs but due to lower supply and demand, DDR1 RAM is now more expensive than DDR2.

DDR2 RAM is the most common RAM and used in most new computers today such as Intel Core 2 Duo (LGA775) and Athlon64 X2 (Socket AM2). Prices crashed for DDR2 RAM in 2008 and it is easily the cheapest RAM on the market …until DDR3 crashes in 2010?

DDR3 RAM is rapidly dropping in price over 2009, but started from a great height compared to DDR2 as expected. Speeds (CAS Latency etc) are finally up to pace and small gains can be found here.

After the release of Core i5 from Intel end of 2009-2010, DDR3 will become the mainstream and we can only suspect prices will fall below DDR2 as production ramps up. Intel  released a new enthusiast\performance processor early 2009 named Core i7  which uses DDR3 RAM but this is still an enthusiast and pricey platform. AMD’‘s new socket AM3 will also be DDR3 capable, but DDR2 motherboards and RAM will remain more popular and cheaper for a while yet.

SD-RAM – Some very old PCs rarely seen are still using the ancient SD-RAM – we sometimes also have this in stock (64MB / 128MB / Single\Double Sided).

Desktop Computer RAM DIMM compared size measurement in centimeters

Source: Intel – RAM DIMMs notch sizes compared, measurement in centimeters

DDR3 RAM is still relatively new and still more expensive than DDR2 RAM. DDR3 memory will become popular in 2009-2010 as more people invest in Intel Core i7 and the mainstream Core i5 arrives, which both use DDR3. When every new generation of RAM (or most other tech!) it takes many months/years for the prices to settle to a reasonable point from the previous generation. Early adopters will always pay some premium, but then buy into any technology too late and you risk it being obsolete before you get a chance to upgrade.

DDR2 RAM prices dropped huge amounts over 2008 and continue to fall in 2009, but it will only be when the demand is higher for DDR3 – likely in 2010 – that it will eventually become cheaper than DDR2. Over time the prices are finally dropping to a more reasonable cost but it takes time for the masses to finally get around to replacing\upgrading their older computers to a DDR3 based computer system. After all still in 2009, many older PCs are still running DDR1 … many, many years after DDR2 was released!


Computer RAM upgrades are very much possible if you feel that the memory that your system currently has is inadequate.  Computer memory installation is quite a simple process provided the prerequisites are met.  The installation is a smooth process if you have the modules of new Computer Ram Upgrades, you are technical or the owner’s manual of the motherboard and all the requisite tools which you will need when you are trying to install the computer memory so that you could easily access the memory slots and add the new computer RAM upgrades.

Here are a few steps which would guide you through the entire process of computer memory installation:

  • Turnoff and unplug the computer and then open the case of the computer.
  • Identify the memory slots that are present on the motherboard. Identifying the appropriate slots that suit your specific module is very crucial.
  • Take out the memory that is compatible with your motherboard and install it slowly.  The procedure to install computer memory differs however from the desktop to a laptop.  While doing the former it is important to align all the notches to the equivalent segments that exist in the slots for the memory.  Once it is inserted firmly into its position it has to be locked with the ejector clips to hold it in place.  While doing the latter, the memory has to be inserted at a 60 degree inclination into motherboard first, and then into the socket at 90 degrees and later locked with the help of the clips so that it remains intact in position.
  • Once this has been done properly, you can replace the computer case, plug it in and you could boot your system too.  The computer recognizes the new memory immediately.

Computer RAM upgrades are available in different combinations and hence it is for you to decide the RAM that you would need for your specific usage.  With the help of the right manuals, computer memory installation is therefore a pretty much DIY job.


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