If you mean those 8 chips on the back of the board at the vrm area,
those are the IR3598 phase doublers.
They dont need cooling.
That whole VRM doesnât need cooling. At typical clocks that VRM puts out like 6W of âheatâ.
Theoreticlly it could work without a heatsink yes.
Still i wouldnt recommend it doe.
Itâs funny that the boards with proper VRMs that donât really need cooling usually get really good heatsinks (and sometimes a waterblock), but the boards with the trashiest VRM get no or very very bad heatsinksâŚ
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Cost savings pretty much.
Cheap boards are cheap for a reason. 
Gigabyte X470 Ultra Gaming and Gaming 5.
The vrm on this particular board looks like a 8+3 phase design.
But its not, because this board is using the ISL95712 pwm,
which is a 4+3 phase pwm but only comes with 2+1 intergrated gate drivers.
This means that you cannot properlly double the phases from this pwm.
What they basiclly did is just double up the components on each phase to make it look like an 8 phase.
But its only a big 4+3 phase.
Now lets get into the specs.
-
pwm: ISL95712 4+3 phases, they doubled up the components on eacht phase to make it look like an 8+3 phase design.
But it definitelly isnt.
They added 4 additional drivers to utilize the full 4+3 phase capabillity of this particular pwm.
4 phases being used for the Vcore rail and 3 phases being used for SOC. -
mosfets: On semiconductor 4C10N for the highside, and 4C06G for the low side per phase.
-
Inductors: unknown.
-
caps: 5K FP.
Memory vrm:
- Single phase configuration with a single 4C06N on the highside,
and dual 4C06N on the low side.
This is a budget board with not a great vrm basiclly.
One of the strong points is that the board has some reasonable heatsinks.
But overall the used mosfets are a littlebit cheapish.
Still this board would be fine running an 6 core Ryzen cpu,
and even an 8 core would basiclly work.
BUt if you are a overclocker and or tweaker, then this board isnt really going to be a thing for you.
Msi X470 Gaming pro Carbon.
This particular board looks like a 10+2 phase design.
But in reallity its basiclly a big 5+2 phase design.
Its not a proper doubling scheme allthough its still uses the IR35201 pwm in 5+2 phase mode.
Main vcore vrm:
-
pwm: IR35201 in 5+2 phase mode.
5 phases being used for the vcore rail with doubled up components on each phase driven by a ChiLL CHL8510 mosfet driver.
And the +2 phases are being used for SOC rail. -
mosfets: Onsemiconductor 2x 4C029N´s on the highside and 2x 4C024N´s on the lowside for each phase.
These are the same decent low rds mosfets as used on the Msi X470 Gaming plus.
Just in a sightlly specâd up configuration. -
Inductors: Ratings unknown to me, but my guess is that they are arround 40A to 45A ish.
But i will update on this wenn i have the exact details on those.
Memory vrm:
The memory vrm is the same as on the Gaming plus.
Its a single phase configuration with dual highside 4C029N and dual 4C024N´s on the lowside.
This board basiclly has a okay vrm for a midrange board.
Its very similar to the Msi X470 Gaming plus, but just in a speced up configuration.
Also it used the IR35201 pwm instead of the Richtek RT8894 pwm on the Msi X470 Gaming plus.
This will give you better overclocking, voltage and LLC control basiclly.
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Will doubled up components make much improvements compair to just doubled Low-side mosfets?
Msi X470 Gaming M7 vrm
The vrm on this board differes slightlly regulation wise from other X470 board that Msi has created.
The vrm on this board this time arround does use a proper doubling scheme.
Main Vcore vrm:
-
pwm: IR35201 in 6+2 phase mode.
6 Phases being doubled to 12 for Vcore using IR3598 doubler.
And the +2 phase are being used for SOC.
This results in a 12+2 phase design. -
Mosfets: On Vcore vrm they used a One single high-side and One single low-side mosfet configuration with ON Semiconductor NTMFS-4C029N´s for the Highside and NTMFS-4C024N´s for the Lowside per phase.
And on the SOC rail they used One single highside and two lowside fets per phase configuration.
Using the same mosfets as for the Vcore rail.
Inductors: Unknown.
Memory vrm:
- pwm: Richtek RT8125E single phase configuration.
With 2x 4C029N fets on the highside and 2x 4C024N´s on the lowside.
Gigabyte Aorus B450 Pro Wifi.
The vrm on this board looks like an 8+3 phase.
But it isnt.
Its a 4+3 phase with doubled up inductors and lowside mosfets per phase.
The ISL95712 pwm which is used on this board is a 4+3 phase pwm.
But only comes with 2+1 intergrated gate drivers,
which means that you have to add 2+2 additional ISL drivers to utilize all 4+3 phases of this particular pwm.
This also mean that you basically cannot properlly double the amount of phases on this pwm.
Thats why this vrm can NEVER be a 8+3 phase.
Main Vcore vrm:
-
pwm: ISL95712 in 4+3 phase mode, adding 2 additional ISL6625A drivers on the Vcore rail and 2 additional ISL6625A drivers on the SOC rail to utilize the full 4+3 phase configuration capabillities of this pwm.
4 Phases being used for Vcore and +3 phases being used for SOC.
Like i mentioned above this particular vrm looks like an 8+3 phase,
but it just isnt, they just doubled up the lowside mosfets and inductors per phase. -
Mosfets: On the Vcore vrm they use a single highside dual low-side mosfet configuration per phase + two inductors.
For the highside fet they use a Onsemiconductor NTMFS-4C10N´s.
And for the lowside mosfets they use NTMFS-4C06N´s.
For the Soc vrm they use a single highside / single lowside configuration per phase with the same fets. -
Inductors: unknown.
-
Caps: 5K
Memory vrm:
pwm: Richtek RT8120D single phase configuration.
With a single highside / dual lowside mosfet configuration.
Using the 4C10N´s.
The vrm on this particular board i personally really concider lackluster.
Its probablly fine for running a 2600 / 2600X.
But it will not be a great board for a 2700X and some overclocking.
I know itâs a necro, but I just remembered the Hardwareluxx community has been compiling AM4 motherboard VRM info. Pictures for some of them too.
https://www.hardwareluxx.de/community/f12/pga-am4-mainboard-vrm-liste-1155146.html
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