What CPU should I get for budget build?

Hello everyone! I am going to be building my first computer and I need some help to pick which CPU to buy. I am going to be putting a radeon HD 6770 graphics card in it and I need a cheap CPU that will not bottleneck the GPU's performance. My choices so far are
-AMD Phenom II X4 945 $109.99
-AMD Phenom II X4 840 $105
-AMD Athlon II X3 450 $79.99

Would the Athlon X3 450 be enough ( I would probly overclock it a bit and unlock the 4th core) or should I just get a quad core?
Any help would be appreciated Thanks!
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More about what budget build
  1. Hi there, welcome to the forums.
    Sounds like a good plan! However, we need a bit more info.
    http://www.tomshardware.com/forum/261222-31-build-advice <--Fill that out, then we can get started :)

    Now, do you currently own the 6770? Well, nvm. That will be covered in the form.

  2. Approximate Purchase Date: idk

    Budget Range:>$500 Before Rebates

    System Usage from Most to Least Important: Gaming

    Parts Not Required: keyboard, mouse, monitor, speakers, OS

    Preferred Website(s) for Parts: newegg.ca

    Country of Origin: Canada

    Parts Preferences: AMD processor, ATI graphics card, biostar mobo

    Overclocking: Yes

    SLI or Crossfire: No

    Monitor Resolution: 1440x900

    Additional Comments: my province has 13% tax and shipping will be about $40

    I dont own the 6770 but i found a good deal on one.

    Parts I picked-

    PowerColor Radeon HD 6770 1GB 128-bit GDDR5 $115

    RAIDMAX Blade ATX Mid Tower Computer Case 500W Power Supply $60

    BIOSTAR A770E3 AM3 AMD 770 ATX AMD Motherboard $50

    Mushkin Enhanced Silverline 4GB $33

    Western Digital 500GB $30

    AMD Phenom II X4 945 Deneb 3.0GHz $109
    AMD Phenom II X4 840 3.2GHz $105
    AMD Athlon II X3 450 Rana 3.2GHz $80
  3. Not bad! 6770 is a great choice for your res.
    However, Newegg.ca is a bad site to order from. It should be a last resort. Use these sites instead, they have free shipping and NCIX will often price match Newegg anyway.

    But, onto the parts.

    Mobo: Good choice, but barely any upgradability. Get one with USB3, SataIII, AM3+ (if in budget) and you should be much better off. You will be able to afford the upgrade from all the savings we get from shipping.
    Case/PSU: HORRIBLE! Raidmax makes VERY bad low end PSU's, never buy one. Look at the Xigmatek 400w or the Antec Earthwatts 380w. We'll find a case later.

    Ram is good.
    HDD is good.
    Now, for the CPU. The 955 if we can fit it, the x3 if not.

    Hopefully that should help!
  4. Thanks! ill definatly check thoes sites out. But for the PSU, will 400 watts be enough for the 6770? don't they need a minimum of 450watts?
  5. Ohh, 400w will be plenty. When they say "this card requires a minimum of" It's a disclamer, to prevent people from sticking them in PC's with crappy 250w power supplies. Look at the latest System Builder $500 machine, they used the more powerful 6850 with a 380w. It's fine.
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