Cheap Descent 750 Watt PSU?

Hi there im looking for a cheapish Descent 750 Watt Power Supply heres my Mother board and things. Im also looking to get a better graphics card maybe an nivda GTX 670 or GTX 560 Ti. Im going to get a new power supply also because im planning on buying a new case so i might ass well get a new PSU since ill probably just be upgrading this PC.

System Specs:
Asus P5Q PRO TURBO
Intel Core 2 Quad Q9505 @ 2.83Ghz
4gb Corsair RAM
Two Asus 5750 Crossfire
Windows 7 Pro
NZXT 500w PSU
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  1. A 550-650W will be able to power both of those cards.
  2. How about 660 Ti also would that be bottlenecked by anything in my system i would just use a 660 Ti instead of my two 5750s
  3. Your core 2 quad would bottleneck those cards.

    Have you ever considered overclocking?
  4. amuffin said:
    A 550-650W will be able to power both of those cards.

    +1.
    I suggest either of these two,

    http://us.ncix.com/products/?sku=59615&vpn=P1550SXXB9&manufacture=XFX&promoid=1257
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817182200

    The 2nd one is on sale and is a steal. You should grab it while you can.
  5. amuffin said:
    Your core 2 quad would bottleneck those cards.

    Have you ever considered overclocking?


    Yeah i have considered it in fact ive tried it but i can't seem to get the voltage right so i gave up in the end. It was my first time overclocking and i don't want to destroy my CPU yet since 775 CPUs are hard to come by these days.
  6. Well, 775 CPU's are pretty much dead.
  7. So what could i do?
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