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Corsair 80+ Gold Fully Modular Power Supply RM650 $99, RM650x $119, RM750x $135 Delivered @ Amazon AU

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  • +1

    Looks like the SF platinums (SFF for ITX builds) are on sale too.

    • +1

      Deal post for the Corsair SF750 Platinum

      • FYI - The difference between a certified 'gold' and 'platinum' power-supply is only 2% increased efficiency at 50% load.


        • For the Corsair SF Series, there's also a difference in the cable. Gold has standard cable, whereas Platinum comes with braided cables.

          • @RichardL: Good to know. Thanks.

          • @RichardL: They're also shorter, so dont just throw an SFX into an ATX for the cables.

            • @ATangk: Do you mean that the cables are shorter if you put them in ATX case and might not reach ?

              • +1

                @chrisie: My friend with an SFX from his ITX build went to an ATX and told me his PSU was hanging in the air because the cables wouldnt reach. It makes sense that the cables are shorter since an ITX board is smaller, and the position of the ports are all over the place with those.

                Suggested to him to get PSU cable extensions which look pretty nice whilst remedying his situation.

                • @ATangk: Thanks for your very quick reply _ eaved me buying one and returning.

        • +1

          The 2% difference going from 90% to 92% efficient @50% is still pretty big. It means going from 10% loss to 8% loss which is 20% less!

          • +1

            @Gravy Train: Being certified that does not mean that particular model cant exceed those specs.

          • -1

            @Gravy Train: With that sort of spin, you must work in marketing?

            • +2

              @Bob81: Nah, That's actually the 110v figures, it's 92% and 94% for 240v operation. So at 50% load the Gold wastes 33% more power! How's that for marketing?

  • Bought one of these yesterday I saw the title and thought I jumped the gun phew.

  • So I have a certified Bronze 620W, been using it for about 8 years now still running fine.

    I have upgraded almost everything except the case and PSU. Power Calc says I only need about 450W. How often does the PSU need upgrading? Should I upgrade my PSU?

    • +1

      I decided to change it after 10 years, since I spent a fair amount on the new rig. Got a gold rated one this time round

    • +3

      If you have other parts that could do with upgrading then I would suggesting spending the money there. This wouldn't be a worthwhile upgrade imo

    • +2

      If it's running fine, don't worry. If the PSU is going you'll see stability issues (though the PSU is not necessarily the cause of stability issues). There's some power savings but for most people they'll never save more in power than it will cost to upgrade, and oversizing a PSU might actually be less efficient.

  • These are the 2018 model if anyone is interested. New model comes out this year, so I guess they are clearing stock.
    Here is a rundown of the 2021 version (available in US, but not AU yet).
    Still a great PSU either way.

    • Removed - was looking at RM model.

    • The 2021 version of these have support for modern standby. However, most desktops currently don't support it. Even though Intel NUC 8th gen or better do support modern standby, I am not sure a NUC is truly a desktop. Modern standby isn't as good as advertised (at least not yet) partially because of the current software / OS implementation. Whether Windows 11 will change that is unclear. Basically, one down side is Microsoft dictates how each type of device does the standby and you are not given a choice (and Microsoft can and had changed how certain classes of devices operate under modern standby). Furthermore, switching between current S3 and modern standby isn't seamless. You get a warning during boot up that a reinstall of the OS is recommended.

      Another thing is about the reviews, please do not use those figures as they apply to every PSU in the series. For example, if you look at 850W series, you could find they all perform better than the 750W series. Therefore, don't judge 650 series based on a review for 750W series. Some reviews look at ~110V, but we are using 240V so the efficiency rating shown there doesn't translate to 240V, the results would be different.

      If you really need a PSU now, you can consider these. However, don't buy a PSU to future proof just yet (might as well wait till all the new CPU, motherboard, OS are out to ensure they will work together).

      • Yea, I'm a bit torn.
        I look at modern standby as a future tech. Not doing much right now, but may get useful later. The efficiency boost at lower voltages is appealing though.
        I tend to run PSUs until they die, so a decade of service is not out of the question.

        • +3

          Can't you buy a PSU that supports it when you are ready to purchase a new M/B, new CPU, and potentially some new peripherals that support modern standby? We do not know whether upcoming SSDs will work even more efficient with modern standby (likewise for upcoming network and wireless LAN cards). Also, are you willing to go Intel just for modern standby (since Intel will implement modern standby on desktop first)? What if AMD doesn't support modern standby in the next gen of CPUs and Ryzen 6xxx series CPUs turn out to be perform very well? PSU dictates your next PC purchase decision? Really? How much is the 2021 model going to cost? $200-$250? That amount is the biggest factor in the next PC purchase decision?

          Modern standby being a big deal on desktops? Will you be willing to go single SSD, 2 DIMMs but higher density RAM modules, and probably the next gen GPUs (which won't be cheap). Are you really saving money if basically a full new system will be required? For what exactly? Making a desktop runs more like a mobile device?

          • @netsurfer: Wow, just relax. I'm not selling the things, just posting in case anyone is interested.

        • +2

          Modern standby is a joke on desktops. Trying to solve a nonexistent problem.

  • how does this compare to the Be Quiet Straight Power 11 750W at $129.99 i think its a way better buy. i picked that one up past this Saturday. looks like its already out of stock for that one. also mwave has the same price so this deal is nothing special.


    • +1

      Be Quiet Straight Power 11 has 5 year warranty. This one has 10. We know retailers are clearing RMx because the 2021 models are coming (or maybe already here). Both appear to be 2018 models.

      • Quiet Straight Power 11 750w would this be the one you would recommend for an ATX case ?

    • What netsurfer said already plus Amazon also has free delivery and imo are one of the easiest to deal with for returns.

      • -1

        the be quiet is more premium, the straight power is from their premium line of PSU, sitting just one level below the "dark power" their highest end model. as the name suggests, it is indeed very quiet so if you value fan noise, this is the one.

        • -1

          There are three tiers above the be quite straight power Gold

          Dark Power pro
          Dark Power
          Straight power platinum

          They are of equal performance.
          The Corsair however is better in two things
          1. It features a zero rpm fan mode for low to medium loads
          2. Double the warranty length.

          No need to justify your purchase, they are very equal PSU's.

          • -1

            @Axelstrife: im just letting ozbargainers know this isn't much of a deal (usual price in other shops) and there are better PSU for the same price, sure the corsair has 0rpm mode but if people are buying this for gaming and that 0rpm mode is never used for that, under heavy gaming load the straight power 11 is way less noisy compared to the corsair, yes warranty is double that's it.

            Also was talking about the categories, you are talking about the models,
            it starts off like this:
            1. pure power 11 (essential)
            2. straight power 11 (premium)
            3. dark power 12 (high end)


  • is 750w enough for a 3070 and r5 5600x ?

    • Im running a RTX 3090 + 5800x 750w Platinum PSU so you should be good.

  • What's the difference between the 650 and 650x

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