SFX PSU help

[Favahutt]

wondering what a good sfx/sfxl PSU would be. Personally debating between 

Seasonic Focus SGX-650 650W 80+ Gold with the sfxL 120mm fan 

or 

Corsair SF750, 750 Watt, SFX, 80+ Platinum with a 92mm fan

 

 

is the larger fan worth it over the higher wattage and platinum rating of the Corsair?

 

or if someone knows a better alternative lmk!

id really like the larger fan and higher ratings. 
 

quietness under load is key

Budget: under USD $200?

Country: USA

 

Other (parts list)

Lian Li o11 Mini

asus x570-i 

ryzen 5 5600x

asus strix GTX 1080 (looking to upgrade to Rx 6800)

crucial ballistix 3600mhz cl16 2x8gb rgb

crucial p5 1tb nvme

[suedseefrucht]

25 minutes ago, Favahutt said:

Seasonic Focus SGX-650 650W 80+ Gold with the sfxL 120mm fan 

or 

Corsair SF750, 750 Watt, SFX, 80+ Platinum with a 92mm fan

They are both Tier A (PSU Tier List - Power Supplies - Linus Tech Tips), so both should be good.
The difference between gold and platinum are like 2-4 % of efficiency.

For noise, I would pick the 120mm fan. Your case supports up to 140 mm power supplies and your power supply is 125 mm.
 

PSU calulator says: 610 W for 5600X max overclocked + RX 6800 XT max overclocked

and 490 W if nothing is overclocked.

 

 

[kampcom]

My opinion would be go with the highest watts and better rating. Seasonic is good but the cables aren't interchangeable. I did see a evga 850 watt gold for around $199(i know your budget is under $200 but minus well go higher just incase you upgrade more). My build got the evga 650watt gold sfx and can't even hear it under load.

[NunoLava1998]

I'd probably go for the SF750, it's an excellent power supply and it'll leave more space in your case

[Zmimgo]

51 minutes ago, Favahutt said:

quietness under load is key

then defintaly the SFX-L PSU.

 

if you are willing to spend more to achive both things:

 

https://www.silverstonetek.com/product.php?pid=731&area=en

 

but tbh an 650W PSU should be able to do 700W without tripping OPP.

[seon123]

41 minutes ago, Favahutt said:

is the larger fan worth it over the higher wattage and platinum rating of the Corsair?

The only "benefit" of the larger fan is the higher noise you get. Personally, I don't consider that to be a benefit, but if you like noise, then sure. The 80+ rating is also meaningless, as mUh EfFiCiEnCy does not equal a better PSU. Same way as you don't pick a CPU or GPU based on TDP, but instead on other things like performance and noise.

 

With a 1080, you would expect around 250W under a gaming load, which would result in about 1000 RPM and 24 dBA with the SGX, while the SF750 would likely just run with its fan off. With the RX 6800, you would expect a bit over 300W under load, which would be around 1300 RPM and 33 dBA on the SGX, compared to fan off on the SF750. All numbers from Cybenetics reports, under the same conditions.

https://www.cybenetics.com/index.php?option=database&params=1,0,12

https://www.cybenetics.com/index.php?option=database&params=1,0,28

[Favahutt]

3 minutes ago, seon123 said:

The only "benefit" of the larger fan is the higher noise you get. Personally, I don't consider that to be a benefit, but if you like noise, then sure. The 80+ rating is also meaningless, as mUh EfFiCiEnCy does not equal a better PSU. Same way as you don't pick a CPU or GPU based on TDP, but instead on other things like performance and noise.

 

With a 1080, you would expect around 250W under a gaming load, which would result in about 1000 RPM and 24 dBA with the SGX, while the SF750 would likely just run with its fan off. With the RX 6800, you would expect a bit over 300W under load, which would be around 1300 RPM and 33 dBA on the SGX, compared to fan off on the SF750. All numbers from Cybenetics reports, under the same conditions.

https://www.cybenetics.com/index.php?option=database&params=1,0,12

https://www.cybenetics.com/index.php?option=database&params=1,0,28

Wouldn’t the larger fan be quieter? As it’s able to move more air at a lower rpm than a smaller fan? 

[Favahutt]

6 minutes ago, Zongohihello said:

then defintaly the SFX-L PSU.

 

if you are willing to spend more to achive both things:

 

https://www.silverstonetek.com/product.php?pid=731&area=en

 

but tbh an 650W PSU should be able to do 700W without tripping OPP.

I’ve heard not great things about silver stone PSU. Am I the one tripping?

[Juular]

2 hours ago, kampcom said:

My opinion would be go with the highest watts and better rating.

Wrong way to pick a PSU.

1 hour ago, Zongohihello said:

then defintaly the SFX-L PSU.

Doesn't mean a thing. Theoretically - yes, a larger form factor may mean quieter PSU, but 'reality is often disappointing'. And although in this case, SX-LTI seem like a quiet unit, i'm not sure if i can recommend it over already mentioned options, reviews we have on it are somewhat lacking in detail even though there are a lot of them, and with SFX PSUs it's especially important to make sure that the product is good because the form factor puts more restrictions on a PSU design and something can go wrong.

 

Corsair SF Platinum is practically the best SFX PSU out there, and so far only a few SFX-L units can come close. Seasonic Focus SGX and it's rebrand - Fractal Design ION SFX-L included, so if they're cheaper and you're fine with SFX-L then go for it. Otherwise SF Platinum is better choice.

[kampcom]

1 hour ago, Juular said:

Wrong way to pick a PSU.

 

how so?

[Juular]

21 minutes ago, kampcom said:

how so?

Because you can make a high nominal wattage PSU with higher efficiency that would be worse than lower wattage, lower efficiency one, it's the whole design that matters, not brand, OEM, wattage, efficiency or capacitors. If you want to get a high quality PSU then make sure that it has at least some proper reviews on it, not the kind of 'spin a PSU on camera for 5 minutes while babbling about it's spec sheet', but from reviewers with actual proper test equipment, a load tester and a DSO at least, for protection tests and ripple measurements.

[leclod]

Surely higher efficiency is a good hint towards quality.

Bigger fans tend to be quieter at same airflow

[Juular]

1 hour ago, leclod said:

Surely higher efficiency is a good hint towards quality.

Bigger fans tend to be quieter at same airflow

If only there was such thing as reviews so we wouldn't have to rely on 'hints'.

[leclod]

27 minutes ago, Juular said:

If only there was such thing as reviews so we wouldn't have to rely on 'hints'.

Well, reviews can often be doubted too

[Juular]

Just now, leclod said:

Well, reviews can often be doubted too

Sure, that's why ideally you need multiple. Any unit that has no reviews should be doubted by default.

[leclod]

I didn't mean what you wrote was wrong, I meant it was too strong,

Judging a psu by its efficiency isn't the best way, but it isn't wrong.

If you had only that efficiency information, honestly which one would you pick, gold or platinum ?

[seon123]

17 minutes ago, leclod said:

If you had only that efficiency information, honestly which one would you pick, gold or platinum ?

I would avoid that PSU. Just like I would avoid any product without reviews

[Juular]

54 minutes ago, leclod said:

If you had only that efficiency information, honestly which one would you pick, gold or platinum ?

Neither lol.

[Dogzilla07]

Going by efficiency information is completely pointless. There's white PSUs which do silver at >100w, there's gold units which do near platinum, there's no rules. There's dozens of 80+ Gold PSUs which are horrible (and any decent bronze would be a better choice), 80+ certification is useless as anything but a basic guideline (and with prior knowledge).

 

From the 2 listed Corsair SF750 is gonna be quieter than the Seasonic, but the Fractal Ion which is based on the seasonic is gonna be closer to the SF750 and quiet enough.

 

Corsair SF series is very quiet even compared to ATX psus.

[GoldenLag]

8 hours ago, Favahutt said:

Corsair SF750, 750 Watt, SFX, 80+ Platinum with a 92mm fan

doesnt really get much better in terms of SFX powersupplies (even including SFX-L). So as far as between those two, the SF is the obvious choice. 

an SF600 tho would also be plenty good. 

[Favahutt]

43 minutes ago, Dogzilla07 said:

Going by efficiency information is completely pointless. There's white PSUs which do silver at >100w, there's gold units which do near platinum, there's no rules. There's dozens of 80+ Gold PSUs which are horrible (and any decent bronze would be a better choice), 80+ certification is useless as anything but a basic guideline (and with prior knowledge).

 

From the 2 listed Corsair SF750 is gonna be quieter than the Seasonic, but the Fractal Ion which is based on the seasonic is gonna be closer to the SF750 and quiet enough.

 

Corsair SF series is very quiet even compared to ATX psus.

Why is the fractal designs closer to the Corsair?

[IkeaGnome]

5 hours ago, kampcom said:

how so?

 

4 hours ago, leclod said:

Surely higher efficiency is a good hint towards quality.

Bigger fans tend to be quieter at same airflow

Ratings don't mean everything and can be faked easily.... Yes, this is for a different brand, but shows that rating isn't everything. Also, we could talk about the gold rated Gigabytes that are having big issues.

 

[Dogzilla07]

4 minutes ago, Favahutt said:

Why is the fractal designs closer to the Corsair?

Im talking purely noise. A combination of some of the following ( better fan, better fan curve, better/bigger heatsink, changes in design). Whatever Fractal asked Seasonic to change for the Ion SFX maxes it a quieter PSU compared to the SGX.

[Juular]

46 minutes ago, Dogzilla07 said:

but the Fractal Ion which is based on the seasonic is gonna be closer to the SF750 and quiet enough.

Eh, i'm not sure i can see the difference here :

Spoiler

 

 

 

But they're both are quite quiet, for an SFX unit still. But SF Platinum is somewhat quieter.

Spoiler

 

 

[Dogzilla07]

4 minutes ago, Juular said:

Eh, i'm not sure i can see the difference here :

Yes, the Aris reviw shows them the same. I was going by some additional reviews, and additional discussions and people's experience on various forums. But I am pulling from memory and mostly closer to launch for the Seasonic SGX.

 

It's possibly it varies unit by unit, or that Seasonic fixed the fan curve, or that the other reviews didn't test as adequately as Aris, or that the users had problem with general fan motor sound or something else.