Dual-forward and ACRF PSUs still good?

[KEIN NEIN]

AFAIK dual-forward PSUs may have coil-whine issues when paired with high-end hardware.

 

and ACRF PSUS don't like transients a lot.

 

So are they worth considering for any gaming-workstation PC? Or should you opt for half-bridge/full-bridge + LLC instead.

[Jurrunio]

@Stefan Payne is this guy speaking the lost language?

[Guest]

1 hour ago, KEIN NEIN said:

AFAIK dual-forward PSUs may have coil-whine issues when paired with high-end hardware.

 

and ACRF PSUS don't like transients a lot.

 

So are they worth considering for any gaming-workstation PC? Or should you opt for half-bridge/full-bridge + LLC instead.

In this day and age, they're not worth considering.

 

Also, the noise associated with dual forward is not coil whine.  Any PSU, DF or LLC can have coil whine.  The noise associated with DF topology is transformer noise from the hard switching characteristics of DF.

 

If anyone is smart enough to ask "what kind of PSU should I get", the right answer should always be one with an LLC resonant controller.

 

[Stefan Payne]

8 hours ago, KEIN NEIN said:

So are they worth considering for any gaming-workstation PC? Or should you opt for half-bridge/full-bridge + LLC instead.

Depends on the Budget and price of the PSU.

 

For 50€ and less -> maybe.

For 100€ -> absolutel not.

 

Also depends what you are doing with your PC and what Component its using...

[Guest]

14 hours ago, Stefan Payne said:

For 50€ and less -> maybe.

If Cooler Master can sell an 80 PLUS White, 230V Only, entry level, fixed cable PSU with LLC and D2D, I think it's safe to say DF is dead. 

 

[KEIN NEIN]

On 6/14/2019 at 7:42 PM, Stefan Payne said:

Depends on the Budget and price of the PSU.

 

For 50€ and less -> maybe.

For 100€ -> absolutel not.

 

Also depends what you are doing with your PC and what Component its using...

I am assuming you find a good deal on a double-forward/ACRF PSU, and initially I was refering to PSUs for gaming/WS pcs as you can see below.

On 6/14/2019 at 11:14 AM, KEIN NEIN said:

 

 

So are they worth considering for any gaming-workstation PC? 

But you made me formulate my question, are they worth considering overall? even if you are planning on builing a basic computer?

[Stefan Payne]

8 hours ago, KEIN NEIN said:

I am assuming you find a good deal on a double-forward/ACRF PSU, and initially I was refering to PSUs for gaming/WS pcs as you can see below.

But you made me formulate my question, are they worth considering overall? even if you are planning on builing a basic computer?

It depends on the System and Wattage.

For 400 and 500W, ACRF is fine. Wich means mid range Gaming PC for example Ryzen 5/7 with an RX5x0.

Navi is unknown at this point. On the nV side I'd say 150W, maybe 200W tops.

If you want higher end and OC, you might want to look at LLC-Resonant mode.

 

Or rather:
Pure Power 11/400W is just 50€.

IF you need a VEGA, a Bitfenix Formula or Whisper M or be quiet Straight Power is recomended (650w Bitfenix, 750W be quiet due to Connection and so on)

[Stefan Payne]

On 6/15/2019 at 4:55 PM, jonnyGURU said:

If Cooler Master can sell an 80 PLUS White, 230V Only, entry level, fixed cable PSU with LLC and D2D, I think it's safe to say DF is dead. 

Listan was first with dirt cheap, 230VAC Only, entry level fixed cable PSU with LLC and D2D

 

https://geizhals.de/?cat=gehps&asd=on&asuch=Performance X#gh_filterbox

 

OK; just dirt cheap for an 80plus Goldish PSU, but still battles with Pure Power and your CX on the Price but with slightly higher efficiency - and lower fan RPM (my 750W goes down to 350rpm - WITHOUT bearing noise).

[Guest]

7 hours ago, Stefan Payne said:

Listan was first with dirt cheap, 230VAC Only, entry level fixed cable PSU with LLC and D2D

 

https://geizhals.de/?cat=gehps&asd=on&asuch=Performance X#gh_filterbox

 

OK; just dirt cheap for an 80plus Goldish PSU, but still battles with Pure Power and your CX on the Price but with slightly higher efficiency - and lower fan RPM (my 750W goes down to 350rpm - WITHOUT bearing noise).

Missed my point AND went off topic. Gee... That never happens.  And don't call Corsair PSUs "my" PSUs.  That's borderline trolling.

 

My point was:  Once DF was used over LLC when efficiency didn't matter because DF has been cheaper for the last 10 years.  Then people went to LLC because it was easier to get higher efficiency.  That made LLC parts cheaper.  Now you can build anything with LLC for the same price as DF.  You can even build one that's "just" 80 PLUS, "just" 230V, and comes in at a price point below ANY Bronze PSU using LLC.  So why use DF?  Given the choice... why?

[KEIN NEIN]

14 hours ago, Stefan Payne said:

It depends on the System and Wattage.

For 400 and 500W, ACRF is fine. Wich means mid range Gaming PC for example Ryzen 5/7 with an RX5x0.

Navi is unknown at this point. On the nV side I'd say 150W, maybe 200W tops.

If you want higher end and OC, you might want to look at LLC-Resonant mode.

 

Or rather:
Pure Power 11/400W is just 50€.

IF you need a VEGA, a Bitfenix Formula or Whisper M or be quiet Straight Power is recomended (650w Bitfenix, 750W be quiet due to Connection and so on)

so ACRF isn't suited for systems that draw more than 500W, bc of transient response I suppose

 

and DF is out of the question due to lower efficiency

[Guest]

1 hour ago, KEIN NEIN said:

and DF is out of the question due to lower efficiency

Lower efficiency and the hard switching doesn't like the high transient loads of higher end graphics cards.

 

Of course, I already said that.  But if you want to ignore me, that's cool.