PC starts lagging when playing a game for too long

My PC starts lagging, either when playing a game that requires alot of gpu and cpu or whatever, or when playing a game for about 20-30 minutes+.

My specs:
ASUS Computer
Intel i7-4770 CPU @ 3.40GHz
16 GB of RAM
x64-based processor

Additional info: I've had it for about 3 years.

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Tell us about your use...

.. of canned air and thermal paste.
Typo edited.

Post was last edited on October 7, 2015 3:17 PM PDT

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I have not

I have not used canned air, thermal paste, or even cleaned it thouroughly. I'm gonna do that tomorrow probably, I just wanted a proffessional opinion of what could be the problems

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Given the low cost of air and paste...

... it's the cheapest thing to try. If that doesn't do it we try other things. Google on cleaning inside a computer.

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Ok this is really good advice,

I noticed however, that my disc usage spiked up to 100% when I experienced a lagspike. It made the entire computer freeze up. A black screen appeared after 1 minute, so I had to restart it. My discs are not full tho. 47 gigs free in my main drive, and 1tb in the other one.

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Heat issues can cause all sorts of woes.

Which is why at 3 years old this the first things we try. Don't rely too much on software temps monitoring, get the cleaning out of the way first.

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There's a lot of posts happening like that.

If it's a Seagate, clone it onto another drive.

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Will clean the computer!

It is a Seagate. How would I clone it?

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The same way as if it wasn't a Seagate.

There are many apps out there but I like to use the freebie from the new drive maker.

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16 GB and disc use spikes?!

How many RAM sticks involved? Two? Four? Try them one stick at a time. If all the RAM is working, shouldn't see such a disk spike as that, because it usually means accessing virtual memory file, and that shouldn't be happening much if at all with that amount of RAM installed.

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How much free space do you have on your hard drive?

Do you clear your browser cache periodically? I use CCleaner to clear cache and cookies.

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Check RAM and disks and Paging.

Three years isn't old, certainly not for a normal domestic installation. I've never experienced problems due to lack of cleaning. I do clean regularly, but only to avoid overheating and consequent component damage. I've opened much older cases that had never been cleaned and were black and furry around fans, with heavily-clogged heatsinks, but the computers were still performing OK. Not convinced that's the problem, but do it anyway.
Do you have any monitoring programs running while playing, say for testing FPS, temperature, CPU usage and such? Don't.
Before playing a game, run Autoruns (autoruns.exe, download from Microsoft's site) and stop as many things from starting up as you are certain won't cause problems - msconfig.exe isn't as comprehensive. Then do a reboot, stop your antivirus, and then start a game.
I agree with James Denison that with 16GB RAM you should not be experiencing much, if any, disc access. So running tests on each stick is good advice. It will also be worthwhile running Chkdsk and surface tests on your disks, and do Defragment the drives. As for the amount of space remaining, you may need more. So uninstall and delete what programs and files you don't need. There are lots of discussions concerning free space requirement. Here's just one -
Also, go to ControlPanel\System\Performance\Settings\Advanced\Virtual memory\Change and make sure both disks have Paging set on them, and maybe try increasing their sizes. Then try disabling Paging altogether as it forces Windows to only use RAM, and you certainly have enough RAM to at least experiment. Discussion here -
When you do solve the problem, do return and explain what did it.

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