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This network interface card can be picked up for about £20 nowadays and is the card i used in my old PC, which is rarely used now but still has adequate capabilities. This network interface card was actually the one that came when we purchased it and can be easily found.
The NIC (Network Interface Card) is produced by Belkin appears to be like any other network card in terms of appearance and so fitting it is fairly easy. Either take out the existing network interface card and place it and and clip it in or take the metal plates which are often placed to prevent dust and other items getting into the computer by accident out and place it in. It takes roughly about 5 minutes to complete the entire fitting process as long as you have the necessarily tools ( screwdriver + screws if there is nothing already there) I would also recommend that when working on your computer you always use an anti-static mat. What this does is prevent any electric charge you may have from damaging sensitive computer components, chances of this ever happening is small but better safe than sorry when you could be working on a PC in the thousands.
In terms of performance this Network Interface Card isn't actually anything special, it provides adequate speeds which are very good value for it's money and it's enough for me on my old computer and i think it'd still perform well enough now. In terms of performance i think for the average user this is more than enough. The card is also fairly reliable, i have never had any issues with it of any sort which is sometimes a rarity with certain components on a computer.
Personally if i were looking at getting at network interface card now to either build a new pc or to upgrade then i probably would not purchase this as it is outdated and chances are it won't be good enough in the near future but if you are looking for just a budget item it is a good choice.