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Thread: PSU Question




  1. #1
    infocus's Avatar
    infocus is offline Junior Member
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    Default PSU Question

    New build:
    Ga-EP45T-UD3P motherboard
    Q9550
    vista64
    4gb Gskill 1333 DDR3
    PNY GTX 260 graphic card
    WD640 blue
    Viotek 700w psu
    +3.3v 40a
    5v 40a
    12v1 35a
    12v2 N/a
    -12v 0.8a
    +5VSB 2a
    Please look at these PSU specs. and comment weather they will power
    my Gigabyte Ga-EP45T-UD3P mobo,without causing a problem.
    Thank you...
    Last edited by infocus; 06-10-2009 at 03:48 AM. Reason: added more specs.

  2. #2
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    Default Re: PSU Question

    I've never heard of Viotek before. Is this the PSU? New V2 Viotek 700W 20/24 Pin High Quality Power Supply with Two PCI Express & SATA, 4+4pin for Server EPS+12v - New Revision for Advanced Cooling at 3B Tech - Buy computer parts, notebooks, desktops, & home electronics
    If it is, then honestly, don't let that POS within 100 Yards of your machine, it's utter sh1te.

    For a 700W unit, it's likely anything under 50/$70-80 will be crap, and at $40 you're definately getting poor quality. Not being a price snob, it's just that a cheap PSU won't have the quality of components to be reliable at a lesser price.

    Do not buy that PSU, you'll regret it. Don't buy a load of good components and then try and save money on the PSU, it always ends badly. Build your system around a quality unit. Good PSU's will die silently if they give out. A poor one will likely take most of your machine with it.

    It can be difficult to convince someone that a cheap PSU is a bad choice as they can be had for peanuts. If you think about it it does make sense. If a cheap 700W psu is $40 and a brand name is $110, then surely there's more difference than just paying for the name? What are they not putting in the cheap PSU to make it so cheap? Poorly rated capacitors, little to no voltage and current regulation, noisy fans etc is the answer.

    Quality and trust worthy brands include:
    • Corsair
    • Seasonic
    • Enermax
    • Tagan
    • OCZ
    • BFG (ES and EX range only)
    • FSP
    • Zalman
    • Antec
    • BeQuiet
    • Akasa
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  3. #3
    infocus's Avatar
    infocus is offline Junior Member
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    Default Re: PSU Question

    Thanks for that ,I'll take a look at Seasonic...

  4. #4
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    Default Re: PSU Question

    where is the new post button and can you get rid of that annoying banner ad?
    Sorry I had to interrupt but I don't see the new post button
    Playin' Solitaire 'till dawn, with a deck of 51...

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  5. #5
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    Default Re: PSU Question

    35A on 12V rail with a 700W power supply?

    700W = ~55-70A on 12V.

    Look at the values for the 3.3V and 5V!!!!!!! :O they are 40A each!.... that is where the 700W is going to... 40x3.3 + 40 x 5 = 332W on rails which are barely used today.
    Last edited by randomness; 06-10-2009 at 09:42 AM. Reason: 40A on 3.3/5V rail!
    Asrock P55-Extreme
    Core I5 @ 3.2GHZ
    2x2GB G.skill Ripjaws DDR3 1600
    ASUS HD5850
    1TB Samsung SATA II
    Corsair TX650W PSU

  6. #6
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    Default Re: PSU Question

    Exactly. It's an ancient design, recycled for cheepness no doubt. It'd actually make a decent PSU for an Athlon XP machine, but as you say, not for anything built in the last 4-5 years.

    To confirm, the maximum available power on a single 12V rail 700W PSU would be exactly 58 1/3A if it were capable of outputing 100% to the 12V line. A multi rail would possibly have some thing like a max of 30A between two or 20A between 3, but OCP would limit the maximum Ampage to the 58 1/3 limit or below. (I = P/V)
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

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