Faster CPU makes games choppier?

Ok, so recently I updated from an AMD Athlon 64 x2 6400 (3.2ghz dual core) that I got like two years ago, to an AMD Phenom II x4 965 (3.4 quad core) and now the two games that i play on PC, ArmA2 and Blackops, are running very choppy even on the lowest settings. Blackops is smooth if I stand still for a few seconds, but as soon as I move it gets worse. But ArmA2 doesn't have a good framerate at all. What would be the cause of this?

Side notes...

When I installed windows on the new HDD, I could not install until I reseated (and swapped slots) my RAM.
My Motherboard is socket AM2+ and my processor is AM3, but I read that they are compatible.
All my parts are a month or two old except for the ram and motherboard.

Specs:

MSI K9N SLI Platinum motherboard
AMD Phenom II x4 965
4gb Corsair RAM (not sure on the specs)
EVGA GTX 460 1gb
320 gb Seagate 7200rpm
800 watt power supply (not sure what brand)
Windows XP SP3
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  1. I think I found your problem:

    http://us.msi.com/index.php?func=prodcpusupport&maincat_no=1&prod_no=254#menu

    Your mobo doesn't support anything above a Athlon 64 X2. Sorry man but you need a new mobo if you want to use that Phenom II.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16813130265

    Thats the best one I can find. But whats going on is that your CPU is not supported so the mobo can't properly work with it.
  2. Dang... lol

    Well 90 bucks isnt bad so I'll have to check that out.

    Much appreciated!
  3. Thats the best one I could find that had dual PCIe slots. But since its a AMD chipset it would only support Crossfire, not SLI. Make sure to keep that in mind.

    I would personally go for a new mobo anyways. That Phenom II will outclass your old Athlon X2 in every way.
  4. Strange it works at all, I would try a bios update before anything else.
  5. simon12 said:
    Strange it works at all, I would try a bios update before anything else.


    I doubt a BIOS update will help at all. MSI tested the Phenom I series and all of them failed. Since Phenom II is a tweaked Phenom I, I would bet it will not help.
  6. Doesn't hurt to just update the bios and see what happens
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