Building your first PCcan be daunting.

Not Checking Dimensions/Compatibility Before Buying

This is one mistake that happens before actually starting the building process.

Or the motherboard you bought is too big for your case.

RGB fans in a gaming PC

Justin Duino / How-To Geek

Ultimately, though, it’s a task that it’s crucial that you be actively on top of.

Triple-check everything before buying it.

Many manufacturers make it very visible so users can remove it, but mistakes can slip through.

The motherboard in the MSI Trident

Hannah Stryker / How-To Geek Hannah Stryker / Review Geek Hannah Stryker / LifeSavvy

you’re gonna wanna remove it before installing it.

Otherwise, the plastic film won’t allow heat to travel from the CPU to the heatsink.

No amount of thermal paste will save you from the fiery disaster that will ensue.

Intel CPU sitting on its socket

Jason Fitzpatrick / How-To Geek

You should apply just the right amount.

Now, you have a big hole in the rear of your case.

It can happen even to experts.

PCIe slots, PCI slots, and other electrical parts in a motherboard.

Jason Fitzpatrick / How-To Geek

Installing Your Fans Backwards

PC fans are made so they can be installed both ways.

However, the wayyouinstall them can be counterproductive if you don’t know this.

This is because you won’t be taking advantage of dual-channel mode.

Closeup of an MSI Motherboard.

Jason Fitzpatrick / How-To Geek

Basically, leave one empty slot between both of your RAM sticks.

That way, you’ll take advantage of dual-channel mode.

Instead, you’re meant to put standoffs in the holes inside your PC case.

650W Power Supply in a MSI Trident

Hannah Stryker / How-To Geek

This way, the motherboard is slightly raised and not touching the metallic back of your case.

You shouldnotunderestimate the importance of yourpower supplywhen you’re buying one.

You could end up with a dead PC.

Never underspend on your PSU.