Here is a AM4 motherboard VRM list compiled by various people and testing results. Also which ones support BIOS flashing without a CPU. Not all, but most boards that will support the new Zen2 CPU’s are listed here. Just thought some info on this would be relevant, with Zen2 and X570 motherboards about to be released.
(https://docs.google.com/spreadsheets/d/1wmsTYK9Z3-jUX5LGRoFnsZYZiW1pfiDZnKCjaXyzd1o/htmlview#)
Awesome.
I didn’t have time myself yet to make a write up,
on all the upcomming X570 boards yet.
But when i have time i will check them out.
I can change the title. (DONE) I guess the TITLE was a bit much. I also found some more info on some old and new Z390 Motherboard VRM’s. and finally found what Power PAK MOSFET"s the Z390 MEG ACE is using. Asrock has a few new Z390 boards with some intersil based VRM’s.
Anyways if the vrm info on the Gigabyte Gaming X is accurate,
then that is going to be a potential fire hazard with an 12 core.
Those 4C010N’s and 4C06N’s and its layout is just terrible 
They could’ve at least used 2 low side and 2 high sides on the Gaming X. They went 2 hi and 2 lo on the SOC. (WTH) another funny thing is they put the other low sides on the back of the board. The only good thing about this board is the ISL6617’s.
Buildzoid has a video about this board. lets just say its interesting.
Also not sure why Asrock went old school with Drmoss implementations.
It´s not a bad powerstage, but they are very basic.
They have likely done it for cost savings.
I would have loved to see them using Smart powerstages like IR´s / Infineon TDA´s,
or an fully ISL implementation with those 60A ISL99227B SPS powerstages on their highest end boards.
But yeah. 
My thought’s exactly. TYC Bryan tested the Z390 Asrock Phantom Gaming 7 and it could’ve been a great board but it falls short. They didn’t use the ISL99227B’s like in the Z370 Aorus Gaming 7.
(the real Gaming 7)
Well yeah those Drmoss power stages are basically just fine for Ryzen.
But i would have liked to see smart powerstages on their highend models.
There is only 1 board that does not have fan… but it does not have enough PCIe slots.
The whole AM4 is so frustrating. Always one step short for my needs.
Will have to stay on Threadripper and hope Zen2 will come shortly.
The chipset fan is ment to cool down the chipset.
Because the X570 chipset produces a significant amount of more heat then X470.
The chipset fan is completly pointless.
15W does not need any significant fins. However having to put real heatsinks and not chop-saw cuts in aluminium on the mainboard would “ruin” the co-designed by Fisherprice aestatic everyone has going.
I am with @MazeFrame on this.
15W is not high enough to need a fan with proper heatsink.
Gigabyte x570 AORUS Xtreme is proof of that.
But even the WS boards opt for small aluminium heatsink with fan.
I hate this form over function stupidity.
Another funny thing are mITX boards with chipset.
Why cant they build mITX with whats on Ryzen SoC?
7.1 audio, 4 USB, 1 PCIe x16 slot (x8 for APU), 2 SATA, 1 x4 or 2 x2 m.2, 10Gb NIC and WiFi 6 is possible.
But they need to waste space on chipset and active cooler and let you pay for it even when not needed.
Two examples:
Fischer ICK PEN 3 FC 22W capacity, 70x63mm area, 25mm hight
Fischer ICK PPC 51 14W capacity, 51x51mm area, 12mm hight
Both cost arround 1.50€ when buying greater 10k pieces.
Asrock has apparently released there X570 series motherboards ahead of schedule.
The spreadsheet hasn’t been properly filled in for the X570M Pro4.
Asrock’s site says it has a 10-phase, but we’ve got to wait and see what chips it’s using, or if it has doublers.
With the price of the boards, it looks like I’ll be avoiding doing an ITX build to save some money.
Asus X570 Prime-P.
Vrm info:
pwm: Asus own rebranded ASP1106, running in 4+2 phase mode.
4 phases for VCC and +2 phases for SOC.
With doubled up components per phase.
So it looks like an 8+4 but it certainly isn’t.
powerstages: Vishay Sic639 50A Drmos powerstages.
Caps: output filtering caps Nichicon 5K / input filtering Apaq 5K.
Memory vrm: single phase design.
Daisy chain topolgy.
Asus Strix X570-F gaming:
PWM: ASP1106 running in 4+2 phase mode.
With tripple the amount of components per phase on the Vcore rail.
So it looks like a 12+2 phase design, but it definitely isn’t.
powerstages: Vsihay Sic639 50A DRmos.
caps: 5K
Memory vrm: single phase design.
With two Vishay Sira mosfets on the highside and two on the lowside.
Daisy chain memory topology.
