PWM: ASP1405 which is a rebranded IR32201 running in 7+1 phase mode.
With double’d up components on each phase.
So it looks like a 14+2 phase but it certainly isn’t.
Because there are no doublers used on the board.
Powerstages: IR3555 60A.
caos 10K FP
Memory vrm: two phase design controlled by an ASP1103.
I see that this board has already been added to list, except for the soc part.
Probably not for any special reason. Neither of the boards is likely to be used with any APU class chip, and only the integrated graphics could use more than two well put together phases. But just in case anybody wants to go that way then the X570-E has a slight edge. Asus also “only” doubles the components though so there might well be some motherboard from another brand that has a beefier SoC VRM setup.
I couldn´t find a clear picture of the Asus X570-E Strix vrm yet.
But according to several sources the vrm is likely a 6+2 phase ASP1405 pwm,
with doubled up components on each phase.
So the soc vrm is certainly just a 2 phase.
According to this it should have 4 virtual phases. And if that’s correct, it should be more efficient with the IR3553 as opposed to the IR3555 that the Hero and Formula have (I can’t imagine the SoC pulling that much power anyway).
But here’s my question: would this result in less ripple? Maybe it can allow for more stable infinity fabric overclocks… hmmm
Since Asus is kinda hating on using doublers now days.
It will be just a 2 phase.
The ASP1405 is a rebranded IR35201 which on the Asus X570 Strix - E Gaming,
is running in 6+2 phase mode.
They double´d up the components on each phase for the Vcore vrm.
So it looks like a 12+2 phase but it isnt.
The only real benefit from doubling up components on a phase,
or to be more specific running two or more powerstages per phase in paralel,
means that you increase the overall current capabillity per phase.
It doesn´t really help improving on output ripple.
Of course when you use a doubling scheme instead.
You will generally get worse transient response,
compaired to vrm´s that don´t use doublers.
But of course there are ways to fix it.
And i would also say with modern pwm´s nowdays and decent powerstages,
it generally shouldn´t really matter that much.
Back in the older days when vrm´s were running on lower swithcing frequencies,
using a doubling scheme instead of a true phase design,
had a significant negative impact on output ripple.
But yeah thats kinda old talk.
I believe that the board doesn’t even support apu’s.
Also i would like to see a stronger 2 phase soc or a 2 phase with doubled components,
on the lower range B550 board for example.
Because it makes a little bit more sense to do that on the cheaper boards.
Unless we are going to get insane apu’s with 8 core 16 threads.
Then it kinda makes sense to do this on the higher end line of X570 boards as well.
But i don’t think that most people would generally put a apu on an $300,- ish + board.
Or a $200,- ish + even.