PC hit from power surge via ethernet cable

My home was struck by lightning via the cable lines which fried an older TV and damaged 2 PC's. My main machine still worked but it was giving me random freezes during gaming or after I started using my machine for 20 - 30 minutes. The odd thing is it doesn't hard freeze the machine, it pauses everything for 5 - 10 seconds then keeps working for 5 seconds, then pauses for 10 - 20 seconds, then works for another 5 seconds, then it pauses for 1 - 3 minutes, then it starts working again for a while. The ethernet port on the motherboard was fried along with a DVI port on the video card. After replacing both of those I went to install windows and the PC froze before allowing me install windows, but I restarted using the restart button and everything installed fine. Then once I started playing games again, the problem persisted. Random freezing.

I've ran Memtest for 26 hours 0 errors, I've ran Prime95 small FTT's for 13 hours, 0 errors 0 warnings on all 4 cores. I'm thinking power supply is the next logical thing to replace but I'm just wondering if anyone has experience something similar in the past or just get everyone's thoughts.

Specs: I5 - 750, P55A-UD3 mobo (replaced with new one already), GTX 460 (replace with me one already), PC Power & Cooling 750 watt, raptor 150 gig HD + 640 WD storage drive, G.Skill ripjaw 2X2gb memory

Thanks in advance for your opinion!
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  1. Something similar happened to my system when lightning hit my phone line. I had to replace the mobo, but that's it.

    My graphics card is fine, as well as the ram, cpu, and hard drive, but the power supply only has a minor problem in that sometimes i need to shut it off and turn it back on in order to boot up the system.

    I would suggest replacing the power supply, report back here if the problem continues after you replace the power supply.
  2. I replaced the mobo, cpu and PSU and still the same error. I also swapped the memory with some spare I had that I know works 100% in another pc and still same error. The only thing I can think is Hard drive. I'd think maybe CPU but I ran Prime95 for a while with 0 errors and 0 warnings. I'm going to run a thorough scan disk tonight to check for bad sectors or clusters.

    Any other ideas would be appreciated.

    Thanks!
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