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Selecting the Correct Laptop Memory Upgrade

Le 21 août 2017, 05:43 dans Technologie 0

Perhaps the most difficult part of performing a laptop memory upgrade is finding the proper type of memory for your specific laptop. Since this can be a complicated subject and often requires some research up front, let us look at a few of the most important aspects of laptop memory modules so you can better understand the key points of selecting your laptop memory.

Form Factor

Laptop memory comes in different form factors. The most common are SO-DIMM (small outline DIMM), others like SIMM (single inline memory module), DIMM (double inline memory module) were used in first generation laptops, but have not been used in years. SO-DIMMs are most often used in laptops as they are smaller than standard DIMM modules used in desktop computers. SO-DIMMs are usually 2.6 inches long and 1.25 inches in height. The smallest module available is the Micro-DIMM; these are very small modules only measuring about an inch wide and are used in high end ultra portable laptops.

Memory Type

In addition to the different form factors, memory is categorized into standards. The most common are DDR, DDR2, and DDR3. All DDR Memory operates in a similar manner as it transfers data on the rise and fall of each clock cycle; effectively doubling the transfer speed of older SDRAM technologies. Each increment represents an improvement in transfer speeds and latency. In some cases these standards are backwards-compatible, but not always. DDR is the first generation of Double Data Rate memory, and is the slowest of the DDR Standards; it is usually packaged in a 200 pin SO-DIMM form factor and runs at speeds of 266 MHz - 400 MHz. DDR2 memory is the second generation of DDR memory, it increases speeds to between 400 MHz and 800 MHz and are packaged in a 200 pin SO-DIMM form factor. The latest and greatest in laptop memory is DDR3; it is available in speeds of 800 MHz - 1600 MHz and comes in a 204 pin SO-DIMM package. DDR3 memory further reduces the operating voltage of DDR2 to a lower 1.5 Volts, offering a slight improvement in battery life.

Transfer Speeds

The speed rating for memory refers to the "clock speed" which is the rate at which the memory can send and receive data. As mentioned previously, DDR modules have clock speeds from 266 MHz to 400 MHz, DDR2 ranges between 400 MHz and 800 MHz, and DDR3 runs between 800 MHz and 1600 MHz. While a higher clock speed is usually better, one important rule to remember is that if you are adding memory alongside existing memory, no matter how fast the transfer speed is on the new memory, it will only run as fast as the old memory since all the RAM in the system has to operate at the same speed.

Pin Configuration

The number of pins and their configuration vary between types. It is important to match the memory type specifically to your laptop. The pin configuration is typically a product of the type of memory being utilized. DDR and DDR2 memory both use a 200 pin configuration for the modules, where DDR2 has a slightly different keying on the module, this helps avoid users trying to install memory into the wrong type of memory slot. Still care must be taken because the difference is very minor and to the naked eye may look the same. DDR3 use a 204 pin module which is the same physical size as DDR and DDR2, but has the key notch further towards the middle of the module.

Latency

Latency is the delay in time from when a memory controller tells the RAM module to access an explicit memory column. This delay is measured in clock cycles for most types of modules. The lower the number the better, but as with memory speed, all modules installed will run at the same latency no matter what their specific rating, so buying ultra low latency RAM and installing it with higher latency RAM will not take full advantage of the low latency RAM.

Voltages

Different standards also run on different voltages. First generation DDR memory runs at 2.5 Volts however DDR2 memory operates at a lower voltage of 1.8 Volts and thus improves on laptop battery life in most instances. The latest DDR3 memory runs at 1.5 Volts offering improved battery life over DDR and DDR2 memory. In general if you get the right memory type, be it DDR, DDR2 or DDR3, it will be the right voltage as the voltage is part of the standard for the module. As the memory types evolved, they began to use lower and lower voltages to operate the RAM memory which has helped curb the energy appetite of laptop computers.

 

As you can see, there is a lot to consider when selecting the correct memory for your laptop. If you are adding memory to your machine, you will need to know the specifications of the memory that is already installed in your machine, in order to get the correct memory. If you are replacing the memory, you only need to be concerned about what memory is compatible with the machine. Luckily, Spare Parts Warehouse has a wide selection of memory and easy to use tools to help you find the right memory upgrade for your laptop.

Replacement Battery for Samsung EB- BA500ABE 2300mah/8.74WH 3.8V Battery

Le 21 août 2017, 05:43 dans Technologie 0

2300mah/8.74WH 3.8V Samsung EB- BA500ABE batteries products are specifically designed for each laptop batteries brand and model. We only sell high quality Samsung EB- BA500ABE battery packs products, each Samsung EB- BA500ABE batteries is brand new, 12 months warranty, fast ship to worldwide.

SAMSUNG EB- BA500ABE Replacement Battery [2300mah/8.74WH, 3.8V]

Replacement Battery>> Samsung EB- BA500ABE battery UK

Samsung EB-  BA500ABE battery

Replace the following part numbers:
EB-BA500ABE
Fits the Following Models: 
Samsung Galaxy A5 SM-A500 A5000 A5009

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The Samsung EB- BA500ABE battery packs isn't charging. What's the deal?

New Samsung EB- BA500ABE battery packs is shipped in a discharged condition and must charged before use. We generally recommend an overnight charge (approximately twelve hours). Refer to the user's manual for charging instructions. Rechargeable Samsung batteries should be cycled - fully charged and then fully discharged - two to four times initially to allow them to reach their full capacity. (Note: it is normal for a Samsung EB- BA500ABE battery packs to become warm to the touch during charging and discharging).

New Samsung batteries are hard for the device to charge; they have never been fully charged and are therefore "unformed". Sometimes the device's charger will stop charging a new Samsung EB- BA500ABE battery packs before it is fully charged. If this happens, remove the battery from the device and then reinsert it. The charge cycle should begin again. This may happen several times during the first battery charge. Don't worry; it's perfectly normal.

uk-online.co.uk warranty policy

  1. Our Samsung EB- BA500ABE battery packs are guaranteed to be 100% brand new.
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Clevo 6-87-WA5RS-4242 battery pack for Clevo WA50 Series 11.1V-48WH

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Can i use a different type of battery?

iCad, NiMH and Li-Ion are all fundamentally different from one another and cannot be substituted unless the device has been pre-configured from the factory to accept more than one type of rechargeable battery technology. The difference between them stems from the fact that each type requires a different charging pattern to be properly recharged. Therefore, the portable device's internal charger must be properly configured to handle a given type of rechargeable battery pack. Refer to the owners manual to find out which rechargeable battery types the particular device supports or use our search to find the device in our database. It will automatically list all of the battery types supported by the machine.

1627 Laptop AC Adapter for Microsoft Surface Pro 10.6inch

Le 21 août 2017, 05:42 dans Technologie 0

1627 Laptop AC Adapter is replacement for Microsoft Surface Pro 10.6inch. The Microsoft 1627 adapter equivalent is guaranteed to meet or exceed Microsoft original specifications. All Microsoft 1627 Adapters are brand new,1 year Warranty, 100% Guarantee Quality and Fully Test! 

MICROSOFT 1627 AC Power Adapter Charger

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Microsoft 1627 adapter
AC Input:100-240V ~ 1.3A 50/60Hz 
DC Output: 12V - 4A 48W
Adapter Fit Models: Adapter for Microsoft Surface Pro 10.6inch
Adapter Part Numbers:
Power: 48W
Connector size: 4.5*3.0mm
Outlet: 2-prong 
1627
MICROSOFT 1627 Adapter Supply Cord/Charger Tips: 1.Please make sure you have order a correct connector. 2.Plase make sure the DC OUTPUT of MICROSOFT 1627 adapters & Connector size are accordant before order. 3.Do not try to modify or disassemble the MICROSOFT 16274.Do not place MICROSOFT 1627 adapter in device for a long period of time if device is not being used. 5.Do not short circuit the MICROSOFT 1627 adapter terminals while you charging for your laptop. We ship to the Laptop adapter around Globe [USA, Canada, UK, NZ and Ireland, Australia]. View more laptop adapter. Contact with us if any problem on selecting power adapter.
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-We warrant that the MICROSOFT 1627 adapters sold in our website are 100% brand new and free from defects in material and workmanship.
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1. Please make sure the DC output and tip size of ac adapter are accordant before you bid.
2. If you use the adapter for a long time,please keep it suitable ventilating and humidity.Do not put it on the skin products.
Power supplies are a frequently misunderstood-and overlooked-PC component. Also called a power supply unit or PSU, the component that supplies power to a computer.
These may be you want to look for :
Dell PW116 Computer Power Supply
HP 504966-001 Computer Power Supply
dell R782R Computer Power Supply
HP 445102-002 Computer Power Supply
HP 611484-001 Computer Power Supply

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