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    Arrow Seasonic X-650 650W Review

    Two weeks ago, I reviewed my first ever 80 Plus Gold certified power supply. Since then, I've been anxious to see more such units, wanting to know if this level of efficiency is possible to find at the same time as ultra high performance. Well, Seasonic read my mind and has sent me one of their new Gold units, the X-650, to play with.

    Tomorrow is Thanksgiving Day in Canada. Will I be thankful I met this unit? Come on in and find out.
    http://www.jonnyguru.com/modules.php...Story&reid=169

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    That's a hell of a unit.

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    Hmm... that chip switches between FM and PWM modes during operation.
    That is rather interesting... Don't think I've heard of that in another PSU before.
    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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    Quote Originally Posted by Zero82z View Post
    That is rather interesting... Don't think I've heard of that in another PSU before.
    It reads "Light load PWM mode operation helps regulation".
    It's been a hard day's night and I've been working like a dog.

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    Quote Originally Posted by Travis View Post
    It reads "Light load PWM mode operation helps regulation".
    do you have CM6901X application note or do you know how to find it, as I know the LLC resonant have lower switching frequency during high load and very high switching frequency during low load but it's not a PWM mode, are you sure the controller could switch to PWM mode during low load? I am not sure if the low frequency PWM will help on the efficiency than a high frequency soft switching?
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    Last edited by ef3393; 04-10-2011 at 01:37 AM.

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    Quote Originally Posted by ef3393 View Post
    do you have CM6901X application note or do you know how to find it, as I know the LLC resonant have lower switching frequency during high load and very high switching frequency during low load but it's not a PWM mode, are you sure the controller could switch to PWM mode during low load? I am not sure if the low frequency PWM will help on the efficiency than a high frequency soft switching?
    http://www.champion-micro.com/product-en/CM6901.htm

    Light Load regulation is accomplished by transitioninig the controller from frequency modulation mode to PWM mode.
    It's been a hard day's night and I've been working like a dog.

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    Quote Originally Posted by Travis View Post
    It reads "Light load PWM mode operation helps regulation".
    That could explain the noise in tests 1 and CL1.
    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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    after read the X-650/X-750 [H] is there a X-850/X-1000 there? looks like I don't have to against module design since the efficiency and voltage didn't drop at the "X" unit
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    Last edited by ef3393; 04-10-2011 at 01:36 AM.

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    Quote Originally Posted by ef3393 View Post
    after read the X-650/X-750 [H] is there a X-850/X-1000 there? looks like I don't have to against module design since the efficiency and voltage didn't drop at the "X" unit
    Pretty impressive reviews from [H] and Guru! Almost unbelievable results... I was eyeing an OCZ 850 and Corsair 850, but I think it will be worth the drop of 100 watts and get a substantially better PSU. I like the full modular bit. The inside looks pretty awesome. Think its time to make my current unit a back up and get me one of these X.

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    omg
    omg
    omg
    omg
    omg
    omg

    i wish they make an x1200

    seasonic please....

    did they ever make a 1kw psu?

    i wish they have an accessory so you can use two x650/x750s

    i don't see it being available at newegg...weird

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