Memory with LEDs

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I'm gunna need to buy some RAM soon for an i7 setup, ideally 3 x2GB sticks. Haven't decided which ones yet, but I've seen various pictures of RAM sticks with a row of LED lights along the top to show how much they're currently being used or something...

Anyone know if any companies still make these for DDR3 rigs?

 

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google it

It was my first port of call! I've recieved more information now and found what I was looking for, but thanks anyway!