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Will my PSU be enough? Pre-upgrade question

Discussion in 'Hardware' started by sweeble, Jan 17, 2011.

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  1. sweeble

    sweeble Thread Starter

    Oct 15, 2008
    I'm just wondering if I can get an informed reply to this question before I go ahead and purchase a new motherboard, CPU & memory.

    I'm currently using a X-Power GTX 480w PSU. It's about a year old just over. Very quiet and has never let me down.
    Link here:

    My current setup is as follows:

    AMD Phenom X3 8750 @ 2.4Ghz [stock heatsink & fan]
    1 x 2GB VData memory @ 667Mhz [stock]
    XFX 9800GT Green Edition 512MB [No external power needed from PSU and not OC'd]
    Biostar MCP6P-M2+ Motherboard
    2 x 120mm LED Fans
    1TB Samsung SpinPoint HD
    LG LightScribe DVD drive

    I'm in the process of putting my new rig together and was going to get it this coming weekend. But I'm concerned about my PSU and whether or not it will be enough to power what I want.

    This is what I was intending on getting:

    AMD Phenom X4 955 Black Edition @ 3.2Ghz [stock speeds and won't be overclocking]
    MSI 870-C45 AMD 770 Socket AM3 GB LAN 8 Channel Audio ATX Motherboard
    Kingston 4GB (2x2GB) DDR3 1333MHz HyperX Blu Memory Kit CL9 1.5V Non-ECC Unbuffered

    I see no reason to upgrade my 9800GT just yet so that will remain. As will the 1TB SpinPoint and DVD drive.

    I'm just wondering if my X-Power GTX 480w PSU will be enough to handle that setup.

    If anyone can shed some light on this for me I'd be greatly appreciative.

    Thanks in advance.
  2. crjdriver

    crjdriver Moderator

    Jan 2, 2001
    It meets the min requirements however when you make something work at or near its max rating, it will not last long. Just think about it for a minute or two; how long would the engine in your car last if you ran it at or near full throttle all of the time???

    Bottom line, I would be looking at a quality unit in the 600W range. Something like this corsair unit
  3. Tanis


    May 29, 2006
    First Name:
    I would tend to agree with crj.

    As a reference point, I use this website here to get an idea of power consumption requirements. It is not the be all and end all but gives you an idea of the wattage PSU you will need.

    With the numbers it gives you, always look at a good quality PSU for around that area, never buy cheap. I tend to get a wattage calculation from there then buy a PSU that would be working at around 80% of its load at the wattage they gave me.

    So, if the site suggests a 450w PSU I will normally buy 550-600w PSU as this means I shouldn't be stressing it even under load and also gives a little room for expansion / upgrade.
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