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Thread: P55-UD4P - Power supply advice please




  1. #1
    ed1 is offline Member
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    Default P55-UD4P - Power supply advice please

    I am purchasing components for my next system build and hoping someone here can advise me as to the amount of wattage I should be looking for in a power supply. I plan to initially install the following components:

    Gigabyte P55-UD4P motherboard
    Intel i7 860 processor
    Corsair 8GB (4x2GB) Cas 8 memory
    AMD/ATI 5870 (one initially, maybe two later) video card
    2 or 3 hard drives, one of which might be a small SSD
    Hauppauge internal TV/HVR card
    Tower-type CPU cooler (Noctua or other brand, probably 2 fans)
    Case with 2 or 3 fans

    I am considering power supplies from 600 to 750 watts. Is this enough if/when a second video card is added?

  2. #2
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    Default Re: P55-UD4P - Power supply advice please

    just buy the highest wattage you can afford but 750-850 watts should be plenty,shop around and get the best deal
    Gigabyte z77x UP4-TH F11c Modded Bios
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    Thermalright Silver Arrow Cpu Cooler
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    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
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  3. #3
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    Default Re: P55-UD4P - Power supply advice please

    I'd go for a 750-850W model. A really good 600W will do the job, but you'll be well north of the comfort zone and potentially less than 50W away from the rated max draw.

    I plan on upgrading to two 58xx cards around june of next year (maybe two 5890's if they're out then) and will be using this PSU (Corsair HX750). Virtually everything else will be replaced at a later date, ie CPU mobo and RAM (i7?) but the PSU will last me for a couple of builds yet.

    With the system you detailed in your post, you'll probably be sucking about 380W-400W at full load when gaming. adding another card should only increase that by another ~188W. At this rate of power draw, the 600W unit is on the edge, but 750W + is fine.
    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

  4. #4
    ed1 is offline Member
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    Default Re: P55-UD4P - Power supply advice please

    Thanks, wazza and psycho. I'll probably go for the 750 watt.

    Psycho, I have thought about the Lian Li A09 but wasn't sure about the ventilation. I guess it works for you.

  5. #5
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    Default Re: P55-UD4P - Power supply advice please

    It'll all depend if you want the extra videocard. I have the HX750w and it ran great with my setup plus an 8800GTS for physx.
    i7 920 D0
    Gigabyte UD4P Bios F9c



  6. #6
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    Default Re: P55-UD4P - Power supply advice please

    Yep, the Lian Li isn't bad air flow wise. It only has the traditional single input, single extraction, but that's basically all you need. I find the concept of cases such as the Coolermaster HAF to be way over the top. There are so many fans that you could very well be compromising air flow. That and the fact that they look really nasty. I'd rather have a stylish aluminium case than a mutated Transformer sitting next to me. Horrible!

    No offence to anyone who owns one by the way, it's all about personal taste!
    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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