Welcome to our shop! Below are our purchase instructions:
Please read the following instructions carefully before purchasing the product and accept it when you take it:

1.Picture For advertisement onlyActual Items manufactor or Batch Number may varyplease prevail in kind! if Special requirements for the product please contact me and then buy!

2.Due to the operating system limitation the actual memory size may be less than for the reservation for system usage under Windows® 32-bit OS. For Windows® 64-bit OS with 64-bit CPU there is no such limitation. The Recognition of XP is around 3GBThe Recognition of Win 7 32Bit is around 2.26-4.5GBThe Recognition of Win 7 32Bit is around 8-16GB Before purchasing rams please confirm which model is suitable for your Laptop.

3.The product is not universal please confirm before buying please download the CPU-Z software and confirm the RAM model! If you are not sure please contact customer service to answer

4.DDR stands for Double Data Rate. Therefore the data rate or effective speed of the RAM is twice the actual clock speed usual models are as bellow: PC2 5300s = DDR2 667MHZ(333X2) PC2 6400s = DDR2 800MHZ (400X2) PC3 8500s = DDR3 1066MHZ(533X2) PC3 10600s = DDR3 1333MHZ(667X2) PC3 12800s = DDR3 1600MHZ (800X2 ) Attention: DDR2 & DDR3 work in different voltage cannot be compatible each other please DO NOT TRY with wrong motherboard. If you DO NOT know about frequency of your computer please confirm with software CPU-Z

5.Type: DDR2 /DDR3 /DDR3L SO-DIMM Laptop memory

6.Function: Non-ECC

7.Frequency: 667/800/1066/1333/1600Mhz

8.Module specifications: 204pin

9.Memory capacity:1GB 2GB 4GB

10Memory voltage: 1.5V1.35V1.8V