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2 hours ago, rlyem said:

We are told when we will buy RAM of laptop,  it should be high voltage but the available is low voltage. Are there any bad effects in laptop if we chose low voltage? :)

What laptop do you have?  There are general points of concern about RAM memory, often about the size and shape physically of the component, how many pins to make contact and so on.

If you know what device it is going to be used with...there are many places to find the correct item.  Most digital devices (including laptops) are usually considered to be "low-voltage" devices.

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2 hours ago, rlyem said:

Brother john, we had ASUS laptop that has a DDR3-1333 SODIM RAM :)

Sr. Alexa, 

The memory module (small-outline dual inline memory module = SoDIMM) is labeled for voltage.  The designation DDR3 (dual data rate 3rd gen) will be followed by the letter “L” if it is a low voltage type.  No letter indicates a High Voltage (standard) type.

 

example:

 

High Voltage (1.5 volts)  DDR3 NO “L”

4GB 1.33 GHz (PC3-10600) DDR3  SoDIMM Laptop Memory

 

Low Voltage (1.35 volts)  DDR3 WITH “L”

4GB 1.33 GHz (PC3-10600) DDR3L SoDIMM Laptop Memory

 


Edited by jwhess
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3 hours ago, jwhess said:

Sr. Alexa, 

The memory module (small-outline dual inline memory module = SoDIMM) is labeled for voltage.  The designation DDR3 (dual data rate 3rd gen) will be followed by the letter “L” if it is a low voltage type.  No letter indicates a High Voltage (standard) type.

 

example:

 

High Voltage (1.5 volts)  DDR3 NO “L”

4GB 1.33 GHz (PC3-10600) DDR3  SoDIMM Laptop Memory

 

Low Voltage (1.35 volts)  DDR3 WITH “L”

4GB 1.33 GHz (PC3-10600) DDR3L SoDIMM Laptop Memory

 

How can i know the correct label,  the technician just told us about it :)

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19 hours ago, rlyem said:

We are told when we will buy RAM of laptop,  it should be high voltage but the available is low voltage. Are there any bad effects in laptop if we chose low voltage? :)

 

If you were told to use high voltage, your laptop may not be designed to run low voltage. If that is the case, it will run the low voltage at the higher voltage instead of detecting the low voltage and running at that voltage. This could cause damage to the low voltage memory.

 

Quote

What is Dual-Voltage RAM?

 

Voltage refers to the power consumed by a module. In the past, most DDR3 memory voltage ranged from1.5 - 1.65v. More recently, dual 1.35/1.5 voltage modules came available at Crucial.com.  While the lower voltage memory has some advantages over high voltage (namely lower power consumption), your system must support it in order to realize the benefits.

 

 

Will the dual voltage 1.35V/1.5V parts work with my original memory?

 

If your original installed memory is 1.5V and you are adding a dual-voltage 1.35V/1.5V module to an open DIMM slot, the dual-voltage module will operate at 1.5V, not 1.35V.  In order to run at 1.35V, all installed memory modules must be dual-voltage 1.35V/1.5V and the system must support DDR3L (1.35V low voltage) to enable the module to run at 1.35V.

 

Which is better; 1.35V/1.5V or 1.5V?

 

Generally, lower voltage is optimal as it consumes less power and in turn, may generate less heat.  However, it is important to note that the overall system must support DDR3L (1.35V low voltage) to enable the module to run at 1.35V.  If the system does not support DDR3L (1.35V low voltage), the module will run at 1.5V.

 

 

Which one should I buy; 1.35V/1.5V or 1.5V?

 

Purchase whichever of memory your system supports, but keep in mind the dual-voltage module will run only run at 1.35V if your specific system supports that voltage, otherwise the memory will run at 1.5V.

 

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