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Thread: psu help please

  1. #1
    Registered User
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    Nov 2004
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    psu help please

    I currently have the following pc:

    amd 1.4 tb
    geforce fx 5900
    dvd rom
    network card
    firewire card
    300w psu

    The graphics card is ok but the rest and in particular the processor is starting to struggle a bit with the latest games so i have decided to upgrade.

    I'm too lazy to build my own and i don't want to go down the mail order route as it sounds like it can be a nightmare if you get a dud and need to send it back so i have decided to purchase a branded machine form the likes of pc world or comet as it is more convienient for me even though it is not the best value.

    The concern i have is that all of these pc's have psu's that range form 180-250 watts which seems really low.
    I wanted to buy one of these and then replace the crappy graphics cards that come with these machines with my fx 5900 card but i am worried that
    this will overload the psu and therefore will not work.

    For example i have found the following acer pc Aspire T130 with the following spec :

    AMD Athlon 64 3200+, Microsoft® Windows® XP Home Edition, Microsoft® Works, 160GB, 512MB DDR, DVD-RW+, GF FX5200 128MB, TVO DVI, Modem/LAN, Speakers

    This only comes with a 200w psu and when i put this spec into the power supply wattage calculator link elsewhere on this forum it recommends something like a 275 watts psu ???

    Also i have read that my fx 5900 uses 20 watts more that the fx 5200 so i would obviously be increasing the power requirements, do you think it would work ?

    Any advice appreciated.


  2. #2
    Registered User
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    Nov 2004
    0 times in 0 posts
    i know its a long one, but anyone ???

  3. #3
    Senior Member
    Join Date
    Oct 2003
    2 times in 2 posts
    • Wam7's system
      • Motherboard:
      • Asus X79 Sabertooth
      • CPU:
      • I7 3930K @ 4.9 Ghz 24/7
      • Memory:
      • 24GB Corsair Vengeance
      • Storage:
      • Samsung 840 240 GB 2x 3TB Seagate
      • Graphics card(s):
      • Nvidia GTX670 & GT430
      • PSU:
      • Coolermaster M2 Pro 1000W
      • Case:
      • Coolermaster HAF-X
      • Operating System:
      • Win7 Ultimate x64
      • Monitor(s):
      • Tri monitor - 27" Iiyama 2x Dell 19"
      • Internet:
      • VirginMedia 120Mb
    200W is getting on the low side. It might just run all the things in the system but you are certainly taking a chance. The PSU is often overlooked but you should pay as much attention to it as any other component. I would not only look at the power rating but also the brand make as you also need to take in the current supplied and how strong the rails are.

    As a rule of thumb I wouldn't go below 300W for the average system and stay to well known makes of good PSU i.e Sparkle (Fortran) Antec, OCZ, Enermax etc.

  4. #4
    Ah, Mrs. Peel! mike_w's Avatar
    Join Date
    Oct 2003
    Hertfordshire, England
    9 times in 7 posts
    Most important thing when buying a PSU is not the rating, but the brand - Antec, Tagan, Thermaltake, CWT, etc. For the rating, I just went for a Tagan 480W - hopefully it'll last me a while, and is BTX compatible (if that ever sees the light of day). Right now, I'd go for at least 350W.

    But whatever you do, don't try the cheap and nasty option on your PSU - there's no point buying a whole load of expensive components and having it all blown up by a cheap PSU.

    And, no matter what, don't buy a Q-Tec
    "Well, there was your Uncle Tiberius who died wrapped in cabbage leaves but we assumed that was a freak accident."

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