The choose and buy memory need to pay attention to some what?

- memory chips
The most important element of a memory is samsung r25e laptop keyboard chip, the stand or fall of it for the whole memory module influence is almost decisive. Due to build memory wafer factory need to spend billions of dollars a huge sum of money, plus the production process is very precise, so the world has the ability to produce memory chip manufacturers very little, basically have: Hynix (Hynix), Samsung (eis), Qimonda (odd dream of), Micron (MeiGuang), er will reach, force crystal, promos, South Asia.
In choosing the best memory chip priority original original word chip, because these products after a wafer plant most strict inspection and test, so the most security quality. In addition, at present a lot of module manufacturers to product image unified, especially the memory chip surface's handwriting printing into their own LOGO, give consumer choose and buy some inconvenience caused. In fact, as long as it is well-known module manufacturers of products, user can rest assured the choose and buy, but don't covet is cheap and buy off-brand small factory products.

PCB -
PCB circuit board is an important part of a memory chip load, its important index layer number is how much and samsung r26 laptop keyboard wiring process. For the mainstream DDR2 memory speaking, 6 layer circuit board is the most basic configuration, a lot of high standard, high frequency products use even eight layer PCB circuit boards. Generally speaking, layer number of PCB, the more the signal anti-jamming ability is stronger, the more help to memory stability.
In addition, the PCB surface line layout is very important also, according to the international electrical learn design specification requirements, PCB surface line must use a 135 degree Angle processing, and to ensure that lead length is consistent, local should use biker wiring.

The work took gold finger
PCB lower for a row of gold plated contact, scientific name is called "golden finger", don't look down upon these glittering contact, if one of the root falls out of the ear or oxidation, it may cause some fault hidden trouble.
At present gold finger production samsung r26s laptop keyboard process has two kinds, one kind is electric plating, and the other is the chemical plating. Electric gold-plated than chemical plating gold layer thicker, can improve the abrasion resistance and anti oxidation resistance.

- capacitance/resistance
In PCB gold finger above and chip around there will be some small electronic components, they are capacitance and resistance. Say commonly, the more resistance and capacitance for signal transmission samsung r29 laptop keyboard stability is good, especially in chip next to the efficacy capacitance and the first root gold hand guide feet filter capacitance.





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