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  1. #1
    Joined
    Nov 2001
    Location
    The barren wasteland of Vinton, TX
    Age
    41
    Posts
    148

    How many watts do I REALLY need?

    OK, time to upgrade my old computer, and as such will be looking for a new case & cooling solution as well.

    Here is my tentative setup:
    AMD 62 3200+
    ASUS A8N-SLI Deluxe
    Nvidia Quadro FX 540 or 1400
    1 DVD burner
    2 HDD SATA
    1 3.5" bay USB 2.0 ports for the front

    I plan on using on-board audion and LAN.

    My old case is an Antec BX635 (I think). 350W. I'm looking at getting an Antec (TX640) becuase I don't need a ton of space, but it is only 400W. Do you think this will be enough juice? I can get the SOHO Tower with a 500W, but I really don't think I need a case that huge.

    Also what exactly is ATX12V v.2.0 ? Is this something I need or can get by without?

    Any HSF recommendations? Something fairly quiet would be nice. I don't plan on doing any gaming, although SolidWorks and Premiere can really work over the processor.

    Any other Case/Cooling suggestions for this setup?

    Current workstation:
    SolidBox Engineer Desktop L2|Intel XEON X5680 (3.33Ghz) Six-core|12GB DDR3|Quadro 4000|Intel 520 SSD 180GB (OS/Programs) | WD Raptor 10k 300GB (Files)|WD Black Caviar 1TB (Video Files/Scratch Disk)|Windows 7 Professional 64-bit


    HTPC:
    AMD Opteron 175 (2.2Ghz) Dual-Core|Corsair XMS 1GBMBx2|MSI K8N Neo4-F|PNY Quadro FX 580
    Antec TruePower 2.0 650W|Antec TX640B Case|WD Raptor 10k 75GB (OS/Programs) | WD Black Caviar 1TB (Files)|Plextor PX-740A|Windows XP Pro

  2. #2
    Joined
    Nov 2003
    Location
    Hamilton, Ontario, Canada
    Age
    39
    Posts
    48

    Re: How many watts do I REALLY need?

    Ok this is what I go by, I would say this is max load of any component. Then make your calculations.

    CPU - 100watts (+/-20watts depending what you go with)
    MEMORY - 35watts per 512
    CD/DVD drive - 25watts
    Hard drive - 25watts
    Floppy - 5watts
    Videocard - 50watts (+/-20watts depending again what you go with)
    Typical non-video pci card 10-20watts
    Motherboard - 40-60watts
    CPU case fans 5-10watts

    I would go with the higher numbers to complety on the safe side.
    Cooler Master Silver Wave Master
    Aerogate II,
    Musketeer

    Antec TrueBlue 480Watt
    Asus A7N8X E-Deluxe
    AMD XP Athlon 2800+ Barton
    1G Corsair TwinX 3200 LL (2-3-2-6-T1)
    ATI Radeon X800 XL AGP
    ATI TV Wonder Pro
    Seagate SATA 80GB 7200RPM 8MB Cache
    Pioneer DVD/16X CD/52X
    Pioneer 106 DVD Writer 4x/2x +R/RW -R/RW

    Air Power - 12 Total Fans
    (cpu fan/heatsink) - Thermaltake Volcano 12 Fan
    (chipset fan/heatsink) - Swiftech MCX159-A
    (video card fans) - Vantec Spectrum Fan Card

  3. #3
    Joined
    May 2004
    Location
    North Carolina
    Age
    45
    Posts
    1,327

    Re: How many watts do I REALLY need?

    -----------------------------------------------------------------


    "We've got a gang of clueless bozos steering our ship of state right over a cliff, we've got corporate gangsters stealing us blind, and we can't even clean up after a hurricane much less build a hybrid car!" -Iacocca

  4. #4
    Joined
    Nov 2001
    Location
    The barren wasteland of Vinton, TX
    Age
    41
    Posts
    148

    Re: How many watts do I REALLY need?

    Hmm, the calculator comes out to 341.

    Kojak's estimates come to about 385. So is 400 as safe buffer or is that pushing it?

    Does anyone know if you can order any of the Antec cases without the stock PSU? I've been pretty pleased with Antec power supplies; any other suggestions?

    Current workstation:
    SolidBox Engineer Desktop L2|Intel XEON X5680 (3.33Ghz) Six-core|12GB DDR3|Quadro 4000|Intel 520 SSD 180GB (OS/Programs) | WD Raptor 10k 300GB (Files)|WD Black Caviar 1TB (Video Files/Scratch Disk)|Windows 7 Professional 64-bit


    HTPC:
    AMD Opteron 175 (2.2Ghz) Dual-Core|Corsair XMS 1GBMBx2|MSI K8N Neo4-F|PNY Quadro FX 580
    Antec TruePower 2.0 650W|Antec TX640B Case|WD Raptor 10k 75GB (OS/Programs) | WD Black Caviar 1TB (Files)|Plextor PX-740A|Windows XP Pro

  5. #5
    Joined
    Dec 2000
    Location
    Cape Cod, MA
    Age
    62
    Posts
    11,621

    Re: How many watts do I REALLY need?

    It can be 600 watts, but if it only does 12 amps on the 12volt line you wont boot, or will crash.
    You need at least 20+amps on the 12volt line with modern MB's, especially SLI boards. Cheaper PS's have a hefty 5volt line, which used to drive the CPU. But now the CPU is off of the 12volt line.

  6. #6
    Joined
    Aug 2003
    Location
    Southern California, USA
    Age
    33
    Posts
    2,697

    Re: How many watts do I REALLY need?

    Also keep in mind efficiency ratings, even if PSU is rated 550w it may only deliver ~420 or so during load in a warm enviroment.

  7. #7
    Joined
    Mar 2004
    Location
    mtl,canada
    Age
    41
    Posts
    37,286

    Re: How many watts do I REALLY need?

    enermax 430watter or above will do.even a 350 will be ok,but under stress so itll live less than it was intended to

    add a couple 120mm fans overhead to drop temps by 10+ celsiusD.S.C-12(2)-disclaimer : whatever u do with your hardware/software is your
    responsibility, which i dont hold if u break anything

    GRAB here OcBible v1.55 and Guidemania v1.21
    scary pooch?pooch#1taking ball from dogpooch pulln on ropeme on board after 2 years
    of no board
    http://gonny.se/ <-cool lady http://www.mediafire.com/?8dmg21ms1vx
    IN MEMORY OF HOW BM WAS TREATED HERE...

  8. #8
    Joined
    Nov 2003
    Location
    Hamilton, Ontario, Canada
    Age
    39
    Posts
    48

    Re: How many watts do I REALLY need?

    Rule of thumb; whatever u need in total watts, add 50 onto that. Thats why I said go with the higher numbers I gave you. You got around 350watts from the calculater, so add 50watts to be safe. You could get by with a 350watt, but you could also just buy the cheapest power supply on the market and get by with that too. I wouldn't recommend the cheap PS even though every computer (me personally) that I have ever build for someone has never let anyone down. Better to invest some extra cash for the better PS and Wattage. Think down to road and about possible upgrades too.
    Cooler Master Silver Wave Master
    Aerogate II,
    Musketeer

    Antec TrueBlue 480Watt
    Asus A7N8X E-Deluxe
    AMD XP Athlon 2800+ Barton
    1G Corsair TwinX 3200 LL (2-3-2-6-T1)
    ATI Radeon X800 XL AGP
    ATI TV Wonder Pro
    Seagate SATA 80GB 7200RPM 8MB Cache
    Pioneer DVD/16X CD/52X
    Pioneer 106 DVD Writer 4x/2x +R/RW -R/RW

    Air Power - 12 Total Fans
    (cpu fan/heatsink) - Thermaltake Volcano 12 Fan
    (chipset fan/heatsink) - Swiftech MCX159-A
    (video card fans) - Vantec Spectrum Fan Card

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