Computer keeps crashing.

I will try to be simple as possible because this problem is very complicated

Computer has been freezing up randomly ever since I first built it
I have replaced one set of RAM sticks that did not match nor were they on the Motherboard's approved RAM list.
Freezing is random. I can be playing any game or idling. Freezing does not discriminate!
I never see any blue screens, errors, or anything. Occasionally I will get the stuttering sound through my speakers but that stopped after I installed Windows 7 along with the blue screens.
I have no viruses according to MalwareBytes


Specs:
OCZ Platinum 2GB (2 x 1GB) ( Two sets)
GIGABYTE GA-EP45T-UD3P LGA 775 Intel P45
Western Digital Caviar GP WD7500AACS 750GB
Intel Core 2 Duo E8400 Wolfdale 3.0GHz LGA 775
nVidia Geforce 9800 GTX+
Antec EarthWatts EA650 650W
Windows 7 Home Premium

Any help is appreciated.
5 answers Last reply
More about computer crashing
  1. Have you ran a memtest? Are all your drivers up to date?

    Also, what PSU are you using?
  2. Here you go.

    I will run a Memtest and my drivers are up to date. Any particular program you suggest for a memtest?
  3. Memtest 86+ is normally the one I run, if there are any problems it will normally pick them up pretty quickly.
  4. Ya ... sounds like a bad memory chip to me!!
    my system is pretty similar to yours and I have never had any freeze ups.
    Just download the file here.
    http://www.memtest.org/#downiso
    I generally use the iso and make a bootable disc. then reboot the system with the disc in tray and your system set to boot from disc.
    Hope this helps.
    JQ
  5. Change cmos battery.Scan full system with SUPERANTISPYWARE freeware.
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