X1561 Dell Refurbished 1GB Memory Module

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Product Number: X1561  *

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Brand: Dell

Description: Refurbished 1gb Kit ddr2 Memory PC3200 ecc Registered 2 x 512mb 30 Day Warranty

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DR397 Dell Refurbished 4GB Memory Module

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Product number: DR397 *

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Brand: Dell

Description: Refurbished DR397 4GB 2Rx4 PC2 5300F DR397 Weight 1.00 lbs. 30 Day Warranty

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46C0513 New IBM DDR2 RAM

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Part Number: 46C0513*

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Brand: IBM

Description: New 8GB DIMM 240-pin DDR II 667Mhz PC2-5300 Memory Weight 0.10 lbs. 90 Day Warranty

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25R8064 New IBM DDR2 RAM

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Part Number: 25R8064*

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Brand: IBM

Description: New 256MB DDR2 - - Up to 300MBps - 1 x SAS 300 - Serial Atta 90 Day Warranty

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46C7429 New IBM DDR2 RAM

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Part Number: 46C7429*

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Brand: IBM

Description: New 4GB 2 x 2GB - 800MHz DDR2-800/PC2-6400 - ECC - DDR2 SDRAM Memory - 24 Weight 1.00 lbs. 90 Day Warranty

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39M5785 New IBM DDR2 RAM

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Part Number:39M5785 *

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Brand: IBM

Description: New F/S RETAIL 39M5785 2GB 2X1GB PC5300 DDR2 MEMORY KIT Weight 1.00 lbs. 90 Day Warranty

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41Y2845 New IBM DDR2 RAM

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Part Number: 41Y2845*

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Brand: IBM

Description:New E 41Y2845 4GB PC5300 DDR2 MEMORY MODULE 90 Day Warranty

 

41Y2732 New IBM DDR2 RAM

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Part Number: 41Y2732*

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Brand: IBM

Description: New 4GB KIT 2X2GB PC2-5300 ECC DDR2MEM SDRAM Memory DIMM Weight 1.00 lbs. 90 Day Warranty

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44T1547 New IBM DDR2 RAM

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Part Number: 44T1547*

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Brand: IBM

Description:New Memory - 16 GB : 2 x 8 GB - DIMM 240-pin very low profile - DDR2 Weight 1.00 lbs. 90 Day Warranty

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46C7419 New IBM DDR2 RAM

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Part Number: 46C7419*

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Brand: IBM

Description:New 46C7419AM 4GB KIT 2X2GB 667MHZ DDR2 LP Low Power Memory FBD DR LENOVO FACTORY ORIGINAL 90 Day Warranty

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30R5145 New IBM DDR2 RAM

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Part Number:30R5145 *

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Brand: IBM

Description: New 8GB 2X4GB KIT PC2-3200 CL3 ECC DDR2 SDRAM Memory RDIMM Weight 0.15 lbs. 90 Day Warranty

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39M5791 New IBM DDR2 RAM

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Part Number: 39M5791*

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Brand: IBM

Description: New - Memory - 4GB 2 x 2GB - Fully Buffered DIMM - DDR II - 667Mhz / Weight 0.30 lbs. 90 Day Warranty

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41Y2768 New IBM DDR2 RAM

[caption id="" align="alignleft" width="136" caption="41Y2768 New IBM DDR2 RAM"][/caption]

Part Number: 41Y2768*

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Brand: IBM

Description: New/NIB New 8GB 2X4GB PC25300 CL5 ECC DDR2 667MHZ RDIMM Weight 0.15 lbs. New Manufacturers Warranty

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43V7356 New IBM DDR2 RAM

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Part Number: 43V7356*

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Brand: IBM

Description: New 16GB 2 x 8GB - 667MHz DDR2-667/PC2-5300 - ECC - DDR2 SDRAM Memory - 2 Weight 0.20 lbs. 90 Day Warranty

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39M5797 IBM Memory Module

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Product Number: 39M5797 *

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Brand: IBM

Description: New 8GB 2X4GB DDR2 Fully Buffered DIMM PC2 5300 667MHZ ECC CL5 CHIPKILL Weight 0.25 lbs. 90 Day Warranty

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46C7420 IBM Memory Module

[caption id="" align="alignleft" width="200" caption="46C7420 IBM Memory Module"][/caption]

Product Number: 46C7420 *

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Brand: IBM

Description: New/NIB New 8GB 2 x 4GB - 667MHz DDR2-667/PC2-5300 - ECC - DDR2 SDRAM Memory - 24 Weight 0.25 lbs. New Manufacturers Warranty

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DRAM modules and its significance

DRAM stands for dynamic random access memory. DRAM devices usually use capacitor charges on an integrated circuit to store the digital information. The capacitor must me recharged frequently, so that the information is retained. So, DRAM is a volatile memory.

DRAMs are generally manufactured in different formats. Some of them are DIP which is Dual in-line package and SIPP, SIMM, DIMM and many other formats. The RAM memory cards used in present day computers are a type of DRAM in DIMM format. DDR3, DDR2 , DDR and SDRAM are synchronous DRAM modules.

DRAM is made to be in sync with the clock of system bus. DRAM chips may contain information after the power supply is removed for longer time at lower temperatures. Under proper conditions, a DRAM is found to contain data for several minutes after power off. This data can be used to break in to encrypted systems and steal private information.

Is DDR3 faster than DDR2?

DDR2 and DDR3 are the memories of the motherboard. Is ddr3 faster than ddr2? The answer is yes but not all the time and it still has its disadvantages too. It’s faster and has more bandwidth and produces less heat but when dealing on the price of ddr3, it’s two to three times more expensive than ddr2 memory especially when choosing a 4GB kit. Ddr2 memory has very tight timings therefore, even at its lowest range of speed, it can still outperform ddr3 memory to its highest speed. Bandwidth and memory latency are the factors that affect the speed of performance by both memories.
By: Sarah A.

DDR3 SDRAM and its advantages over previous versions

DDR in DDR3 stands for Double Data Rate. It is the latest memory standard for hispeed SDRAM that we use in our computers. DDR3 is a improved version of DDR2 in many aspects. DDR3 Ram is a type of DRAM. DDR3 shows a lesser power consumption of 30 percent and also a lower operating voltage when compared to DDR2.

Lesser power consumption means less amount of heat generated. So, the cooling needs of DDR3 are less than DDR2. DDR3 Ram is not forward or backward compitable with any type of other RAM as the operating voltages, clock speeds, timing and several other factors.

DDR3 memory has a high bandwidth interface. In addition to all these advantages, DDR3 memory type also provides the facility of having up to 8 Gigabites of memory on board. DDR3 RAM modules have different notch positions to DDR2 to prevent accidental insertion of DDR3 memory in to DDR2 slots.

Types of Computer Memories

We have come a long way from the days when heavy tape drives were used to store information to hand held little devices available today. Computer memory is nothing but the collection of data on physical devices in a digital format i:e 0's and 1's.

To classify memory, there are two types broadly, one is volatile and the other is non volatile. As their name suggests, volatile memory can store information only till it is supplied with electric energy and non volatile memory can retain the information even after the supply is disconnected.

In present day computers, RAM is a volatile but high speed memory, while Hard Drives are non volatile but low speed memory. There are many types of volatile and non volatile memories that have been developed. Among them, Different types of RAM like SDRAM, DDR, DDR2, DDR3 etc stand for volatile and flash drives, hard disks and optical storage devices are a few types that come under the non volatile category.