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PSU Advice

Discussion in 'Hardware' started by Rover977, Aug 9, 2008.

  1. Rover977

    Rover977 Byte Poster

    Hi, I am looking to purchase a new PSU and primarily wondering what sort of wattage I should go for, for what I want to do.

    Basically I need one NOW for an older (5 yr old) system on which I have upgraded the CPU, but one which will be useful for a future rig also.

    The current older system is :-

    Celeron 1.8GHz
    Chipset = Intel 845-E (Brookdale-E)
    Mobo = QDI PlatiniX 2E v2.0
    2 x 1GB PC3200 184-pin DDR SDRAM
    PSU : UPGUARDS MPT-301P, 300W

    The new CPU is :-

    Intel P4 3.0Ghz Socket 478 Northwood CPU (S-Spec : SL6WU), 800MHz FSB, Hyper-Threaded

    With this new CPU at 3GHz I am experiencing hangs under load (eg running Prime95 stress test or booting up 3 VM's simultaneously - though they CAN boot individually OK).

    The temps a seem OK (37 deg C idle in XP Pro) so the problem is most likely the PSU not providing sufficient power.

    I am wondering what PSU wattage I should be looking at - for maximal future upgradability in a future rig I use it in - eg I may want to put in a high-end graphics card or upgrade the CPU again. What ball-park figure should I go for ? I see they go up to 1000W and beyond. Also does anyone have any particular models they like, or don't like for any reason ?

    I am effectively 'over-clocking' my chipset with this 800FSB CPU as 845-E chipset only supports up to 533MHz FSB, but my mobo has a jumper setting for 800MHz FSB and the latest BIOS (v2.2SLCP) supports 800FSB - so I figure it should work.
    Certifications: A+, Network+, Cisco CCNA
    WIP: Maths
  2. NightWalker

    NightWalker Gigabyte Poster

    I would go with this.
    I have a 530watt Hiper running a C2D overclocked to 3.2, 4 hard drives, 2GB of RAM, an 8600 graphics card, sound card and 5 fans. If you went with the one I linked to it would give you more than enough power for whatever you want to do with it and is a reasonable price.
    Certifications: A+, Network+, MCP, MCSA:M 2003, ITIL v3 Foundation
  3. Rover977

    Rover977 Byte Poster

    Thanks NightWalker, really like the look of that PSU for the price range and the reviews on overclockers.co.uk are very positive - it'll certainly be on my narrowed down list for when I buy
    Certifications: A+, Network+, Cisco CCNA
    WIP: Maths
  4. Jimbooo

    Jimbooo Nibble Poster

    Yeah I would definitely say a 500W PSU minimum and you'll be safe. But you haven't mentioned your graphics card - if it requires any power connectors etc..
    Certifications: 4 A-Levels
    WIP: BSc (Hons) Computing

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