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My computer has always been very fast since I formatted and reinstalled Windows 8 x64. Yesterday I did some things - the result is that my computer became VERY slow.

  • Game performance is greatly decreased - even Doom 2 stutters.
  • CPU and disk performance is greatly decreased - compiling my C++ projects takes 3x the time it took before
  • Applications and explorer generally feel slower and sluggish

So, what did I do yesterday?

  1. I bought a new microphone, and plugged it in
  2. When I plugged the microphone in, I moved the case around (gently)
  3. I installed Windows 8 x64 on my old laptop, logged in with my Microsoft account, and the setting synced between my desktop and my laptop. This is when I noticed the slowdown. I used system restore in order to go back to 28 February - this restored the original theme I had on my desktop. I disabled syncing on my desktop. Slowdown was still present. I cleaned the computer using CCleaner and Glary Utilities. Slowdown was still present. I booted in safe mode, cleaned Startup applications, Automatic services and unused drivers in the Device manager. I updated my video card drivers to the latest version. I ran Windows Update. Slowdown was still present.
  4. Went to bed.

Today, I turned off the computer, unplugged all cables, opened the case, cleaned up the inside, checked if any cable was not connected properly. I plugged everything back in. Slowdown was still present.

I don't know what happened, and I don't want to format my computer again - there has to be a solution to the problem.

Specs

  • OS: Windows 8 Enterprise x64
  • CPU: i7 2700k @ 3.50GHz (Sandy Bridge 32nm)
  • Ram: 8GB Corsair Vengeance DDR3
  • Mobo: ASRock Z77 Extreme4-M
  • GFX: GeForce GTX275
  • SSD: OCZ-OCTANE 128GB

Reports


Update

I noticed RAM frequency (MHz) was way lower than expected. It should be 1600MHz, but it barely reaches 600MHz. I tried removing 1 stick of RAM, changing places, checking BIOS information. Still a lower frequency.

I tried a completely different stick of RAM (taken from another computer), that should be 1333MHz. It barely reached 500MHz.

Is it possible that an hypothetical electrical shock generated when I plugged in the microphone screwed up the motherboard? The microphone wasn't working right at first - I had to open it up and touch the cables to get it to work.

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