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PC Turns on, but monitors,keyboard,mouse etc doesnt work.

Hey, in the middle of a game my PC randomly crashed, and my monitors, keyboard, mouse, headset and all didnt work. I then tried to replug everything in the PC, and it worked for about a day untill the same stuff happened again. Tried replugging everything in the PC, CMOS reset, but nothing will work. All of the fans work when i turn on the computer. Anyone know where the problem is? Would really appreciate the help so i could replace or fix the problem!

Thanks in advance

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Clarification Request
Add some PC details.

In reply to: PC Turns on, but monitors,keyboard,mouse etc doesnt work.

Also, if you google "The Dead PC" you find this is well discussed. You find they strip it down to less parts and at some point you have just a few parts that may or may not work. If you get down to 2 or 3 parts and it's not working it's one or more of those parts. If it does work, it's one of the other parts with one exception. What part is that? The PSU. Too many PCs are built with a sub par just barely capable PSU and you can find it work stripped but not with all parts.

That's why details matter.

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My details

In reply to: Add some PC details.

Corsair H100i Hydro Series CPU cooler
Intel Core i5-4670K
Kingston DDR3 HyperX Beast 16GB RAM
MSI Z87-G45 Gaming, Socket-1150 Motherboard
CoolerMaster GX 750W PSU (very old, i think around 6-7 years)
Graphics card is ASUS Radeon EAH5870 (very old aswell, 6-7 years)

I tried to run the PC without the graphics card and the Mouse, Keyboard and headset started working. Does that mean the problem is in the Graphics card, or could it still be the motherboard or PSU? The fan on the Graphics card still runs when its plugged in.

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It's either what was removed

In reply to: My details

Or the old PSU.

The old PSU looks to be single rail so for now I'd give it a pass. In the shop we'd swap it and test the GPU in another PC but at that number of years it's suspect too.

Try another GPU. The Nvidia 1050 or 1060 would be a step up.

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In reply to: It's either what was removed

I might just go for a upgrade on both then. Dont know too much about computers other than just building them. I see theres tons of different 1050 and 1060's. Looking to spend as little money as possible, as i pretty much only play League of Legends and some Counter Strike.. Could you maybe link me to the cheapest Graphics card that works good enough for my use? My previous one was good enough. And also for PSU, should i go for 750W again or what?

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Then a nod to and a 1050 there.

In reply to: parts

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