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Thread: Corsair 650w vs 750w

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    Default Corsair 650w vs 750w

    I'm currently looking over two models to replace my godawful bfg 650w supply. The Corsair 650 and 750 models both look good, and right now the prices are extremely close, so it would appear to be a no-brainer...

    but

    The 650 is a Seasonic build, and the 750 is a CWT build. From what I've been hearing, the Seasonic builds have generally been superior with a much more stable 12v line and overall superior build quality.

    Both should meet my needs. For reference, here's my setup.

    Intel Core2 Duo 6550 @2.33 GHz
    ASUS PK5C Motherboard
    1 DVD+/-RW combo drive
    1 HDD (Seagate)
    4 GB ram (4x 1GB Supertalent)
    XFX GeForce 9800 GTX+ (Single, no sli)
    Antec 900 Case (4 120 fans + 1 200 fan)

    Given that, what's going to end up being the better option for this system? My main reservation about the 750w is I've seen several reviews noting exceptionally high ripple on the +12v. I've had a lot of bad luck on GPU hardware over the past few years, let's say it's made me a bit erm...cagey about potentially hardware-life-draining problems. Am I overracting to the bit about the +12v ripple considering my power needs? I'm not really into overclocking or SLI...the biggest change to my power needs in the forseeable future might be adding a 2nd hdd. Still, upgradeability is a good thing...any thoughts?
    Last edited by CombatLibrarian; 07-11-2009 at 09:29 PM.

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    Default

    You could run all that off a VX450 easily, so I would say go with the TX650 for the better output quality. The extra 100W of power from the TX750 won't make a difference to you. Realistically though, with the loads you'll be running, it doesn't make a difference which one you choose.

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    Default

    It's usually the other way around, CWT have better regulation (especially the PSH platform) and the build quality depends on the model.
    The SPCR review of the 650W also noted high +12V ripple (but still in spec), but I would worry about that with your setup.

    It's up to you.
    Sent from my PC using my browser.

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    Default

    Looking further, the only other potential issue I can see at my level of power needs is power regulation. Reviews putting the regulation on the 3.3V as somewhat poor on the tx750w, general consensus seeming to be that while they both have some 12v ripple issues under heavy load, the tx650w seems to have the better regulation which is more likely to actually come into play. (The outlets here are brownout city, though I do run through a line-interactive ups).

    Leaning more towards the tx650w.

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