Well its pretty simple.
Its all into unclipping, cleaning, snaping in, and putting the heatsink on.
First you Open your case, and make sure you unblug your 4 pin power, and 24pin power connectors, and get as much space as you can, just to be safe.
Then you expect your heatsink, could be queit dusty, but you can clean that during the install. There will be a clip/lever/mechanism, that you will have to pull up ussualy. Pull up on the lever, and the heatsink should become loose.You might have to turn your heatsink 45 degreese side to side to loosen it after both sides of the clipping mechanism is of the bracket on the motherboard. Then it should just pop off with some force or come completely off like a breaze. After that you will see some paste on the processor and your old heatsink. You will see the chip in the socket, and there will be a steel lever to pull up on, Once the lever is realeased to the up position on the socket of the motherboard, you can just pick the processor up right from the socket. After that you can unpack your new processor, but you have to get the Key right. There is 1 edge of the processor that has a key on it, and the socket has the same key. Its really noticable, and theres not way you can put the processor in wrong. Just slide it in, pull the lever down to secure it, grab your thermal past and apply a big drop in the middle, or if you are using the stock heatsink, or the new heatsink that comes with the processor, then the Thermal paste will already be applied. Just put it on then secure both sides of the clip and your done.
Notice the ^^^^ ENDENT On the bottum left corner, its easy stuff trust me.
Basicly its really simple. Just 2 levers, The processor is keyed so you cant put it on wrong, and make sure to put thermalpast on and secure the heatsink even on all sides. Then your good to go
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