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Corsair SF750 750W 80+ Platinum Modular SFX Power Supply $239 + Delivery (Free Pick up) @ Umart

770

Great power supply for small form factor builds, essentially the industry standard and suitable for anything right up to a 3090 / 5950x.

Usual price is around ~$259, rarely see it drop below $250 (particularly with PC component prices on the rise).

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  • Worth noting that you can run most 3080 systems on an sf600 (even potentially with an OCed 10900k), especially with an < 100 w CPU or mild undervolting.

    But of course there's still a place for the sf750

    • +1 vote

      Sure, but the lower the power draw the higher the efficiency up to a point.

      I think it's 50%. So, a 600W PSU becomes less efficient with increasing curve of heat/noise past 300W. I'm probably wrong on the figures, and massively oversimplifying it, but I think that's in the ballpark.

      Tl;dr: The lower the proportion of the max power that you use, the cooler and quieter it will run.

      • Yeah to expand in that from memory most psus efficiency curve is best between 50-70% consumption. Too low and too high is not at its most efficient

        • Generally that's true, but the SF600 is a really great PSU. It's still at about 89% efficiency even at 600watts and deals well with spikes at 110% of its advertised capacity.
          The SF750 is great too and possibly allows for a longer life if some efficiency is lost over years of use, but the 600w model will be sufficient for the majority of builds.

          Source: https://www.tomshardware.com/reviews/corsair-sf600-platinum-...

          (Note: I use the even lesser SF450 in my Ryzen5/5700XT build with no issues)

      • Also the main reason to get the SF750 is for the lower fan trigger point. The SF750 can run higher longer before the fan kicks in.

        • That's definitely a valid point

        • PSUs will also degrade in efficiency over time - if you plan to keep your build for a long time or want it to have better resale value, might be worth considering. Also worth thinking about if your build is near the limit for SF600 (especially if you're overclocking an Intel chip) or you think graphics cards will become more demanding next few generations and you may upgrade.

        • I got the SF750 and from memory the manual says the fan doesn't kick in at all until 50% loaded

          • @TheLurker: Yes this is definitely the reason to get this model. It doesn’t heat up quickly to a point where the fan needs to run. Also higher wattage PSU typically uses higher quality components so it is a good long term investment.

            • @Davesday: It was a past comment here that convinced me to spend the money on this model. Someone said a PSU not only has a big impact on stability when pushing a system, but is also a component that will be reused for years across builds. I don't regret spending the money on this one at all.

              Only frustration with it is the CPU power cable is a tad too short for neat cable management. An extra 50mm would have made a big difference.

    • You can run, doesn't mean you should, same as you can daisy chain a pcie cable and should still be fine, but you shouldn't

      • It's certainly not unsafe or intrinsically a bad idea for most systems without extremely power hungry cpus. Most 3080 systems will be drawing peak 400-500w under full gaming load, with average draws even less. The sf600 plat is more than capable of delivering that reliably.

        It's good to be careful with PSUs, but at the same time there is such thing as overkill.

  • Thanks, I ordered one (and a mobo and thermal paste too) thanks to this post.

    I was actually holding out for the new SilverStone 1000W sfx-l psu, but after reading some early reports of it (prompted by this deal), I decided that the lower noise and rock solid reviews for this Corsair PSU make it the best choice today and totally capable of running a 3090 + whatever AM4 CPU I pair it with.

    Thanks Op.

    • Which board did you get? I’m looking for an itx myself, can’t decide.

      • +2 votes

        A shamefully expensive one: Asus x570-i Gaming

        I've been looking at it for a while and don't see it much below $400, so I bit the bullet and bought for $399.

        To be honest, the mobo doesn't do anything that a cheaper board can't, but I really wanted it.

        I also can't deny the influence that Buildzoid had when he gushed about this board on his Actually Hardcore Overclocking channel: https://youtu.be/pc2F1jVnPnY

        To be fair, he highly recommends other x570 boards too.

        You should probably look at his AM4 recommended motherboard roundup and skip to 21:51 for the ITX boards: https://youtu.be/S_FUe36jHaw

  • Not likely at this point, but check if the serial numbers fall in a bad batch that Corsair had to replace.

  • Can this support Ryzen 5900X and RX 6800 XT??

  • I have this in a 3900x with a 3060ti this thing is perfect (bit of overkill) but super quiet and future proof. You won't be unhappy.

  • Bought thanks!! OOS now..

  • small but crushes most high end normal sized PSUs out there.

  • The Platinum standard for SFX builds!

  • i have an r53600x and rtx 3080, 5 rgb fans, 4 SSDs,
    currently on a 650w gold (thermaltake)… Was going to go a 850W before i considered overclocking cpu. Got the GPU undervolted atm too. Could prob give the cpu a bump on this setup, but I don't want to risk it.

  • They're back in stock