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Thread: Enough Juice in Your Opinion?

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    Default Enough Juice in Your Opinion?

    Hi,

    This is just another quick "Do I have enough juice to run this" question.

    Current Specs:
    MSI K9A Platinum 580X/SB600 Motherboard
    AMD Athlon 64x2 6000+ Windsor
    Arctic Cooling Freezer 64 Pro
    Visiontek HD 4850 512MB GPU
    G.skill 4GB (4x1GB) DDR2 800 (5-5-5-15) memory
    Western Digital Caviar SE 160GB SATA HDD
    Lite-On SATA 16X DVD Burner
    Super Talent All-in-One Card Reader
    Western Digital Elements 640GB Exteranl USB HDD
    5X 120mm Case Fans
    (several other USB devices: Mouse/Keyboard, Printer,Sony Camcorder dock)

    Current power supply:
    Corsair 550VX 550W
    Has been in service since 11/07

    * System was never overclocked*

    I recently received a gift card for Newegg and was thinking about adding a second HD 4850 to the system (link) .. but I'm concerned if my current power supply will be able to handle the load,considering the amount of components in the computer and especially since the power supply has been in use for just over two years now.

    I looked on AMD/ATI's site and it lists the Corsair 550VX as certified for two HD 4850s. I also ran some power supply calculators (you know, those Extreme and Antec calculators), and they are basically saying minimum recommended is 550W...

    So, whats your thoughts... would I be cutting it too close? Or, do you think it will be OK?

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    Default

    Don't worry about it. When they certify a certain PSU for SLI/Crossfire they also leave some headroom.
    The whole "minimum recommended" can be confusing, it means a PSU that will run the system safely with plenty of headroom not to cause problems.It doesn't mean that a 449W PSU won't be enough.

    The power consumption of your system is somewhere around 300W.
    Sent from my PC using my browser.

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    Default

    The VX550 is definitely enough. You've got nothing to worry about.
    Main: i5 2500K@4.6GHz w/Zalman CNPS10X Performa, Intel DZ68BC, 8GB G.Skill DDR3-1600, PNY GTX 470 + EVGA GTX 470, ASUS Xonar DX, ADATA S510 120GB, Samsung 1TB F3+1TB F1+2TB F4, Kingwin LZG 1kW, Lian-Li PC-9F, Dell U2212HM+S2209W, Win7 Professional.
    Laptop: Dell Vostro 3450, i5 2410M, 8GB DDR3-1333, AMD Radeon HD 6630M 1GB, Intel X25-M 80GB, Seagate Momentus 750GB, Win7 Home Premium.

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    Default

    I bet you even have enough room for crossfire

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    Quote Originally Posted by PowMaxed View Post
    I bet you even have enough room for crossfire
    That would be a bit closer to the PSU's maximum load than would be prudent. I'm sure the VX550W could handle it, but it would be running hot when the system was under load and might shorten its lifetime, not to mention give poorer efficiency. I always like to see at least a 20% headroom under maximum load, which means for his system with Crossfire I'd probably go with a good 600-650W.
    It's my PSU in a box!
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    Quote Originally Posted by Phaedrus2129 View Post
    That would be a bit closer to the PSU's maximum load than would be prudent. I'm sure the VX550W could handle it, but it would be running hot when the system was under load and might shorten its lifetime, not to mention give poorer efficiency. I always like to see at least a 20% headroom under maximum load, which means for his system with Crossfire I'd probably go with a good 600-650W.
    He's got plenty of room for Crossfire. I doubt he'd be pushing more than 350W or so.
    Main: i5 2500K@4.6GHz w/Zalman CNPS10X Performa, Intel DZ68BC, 8GB G.Skill DDR3-1600, PNY GTX 470 + EVGA GTX 470, ASUS Xonar DX, ADATA S510 120GB, Samsung 1TB F3+1TB F1+2TB F4, Kingwin LZG 1kW, Lian-Li PC-9F, Dell U2212HM+S2209W, Win7 Professional.
    Laptop: Dell Vostro 3450, i5 2410M, 8GB DDR3-1333, AMD Radeon HD 6630M 1GB, Intel X25-M 80GB, Seagate Momentus 750GB, Win7 Home Premium.

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    Default

    CF 4850s apparently pull around 200W max:
    http://forums.atomicmpc.com.au/index.php?showtopic=264

    So 350W total seems about right. I would never recommend a 550VX in a new CF system like that, but I wouldn't replace one either probably. 650TX was my usual recommendation in new builds like that.
    i7-2600K W/Apogee XT block, ASRock Z77 Extreme 4, G.Skill 2x4GB 1600, Powercolor 5870 W/EK full block, Seasonic X650, Intel 320 160GB, Caselabs M8

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