MSI x470 gaming plus is completely fine with 3700x even with 3900x don't waste your money...No, and here's why.
https://www.anandtech.com/show/12990/the-msi-x470-gaming-plus-review
It only has a FOUR phase design, just like B450. It too is at the very bottom of the stack for it's chipset family.
If you HAVE to go cheap, I'd look at the Gigabyte X470 AORUS ULTRA GAMING which has an 8+3 power phase design, and is only a few bucks more than the Gaming plus.
MSI x470 gaming plus is completely fine with 3700x even with 3900x don't waste your money...
Refer here View: https://www.reddit.com/r/Amd/comments/c7qj5e/am4_vcore_vrm_ratings_to_help_you_decide_on_a/?utm_medium=android_app&utm_source=share
There's numerous articles about the Aorus 8+3 VRM being fake marketing and they are really only phase 4
I agree that that Msi B450m Pro-vdh should be avoided. As to the rest of this post.....The Chipset has nothing to do power delivery. There are plenty of b450 and x470 boards with terrible power delivery. The Gigabyte X470 AORUS ULTRA GAMING you suggested is a prime example. There are probably in the range of 10 b450 motherboards that have objectively better VRMs than that motherboard. New Ryzen 3000 builds with 400 series boards should be reserved for b450 and Ryzen 5/7 IMO. If you already have a compatible 400 series board, and the power delivery is up to task, then by all means go for it. If you want to do a new build with R9 just buy a $200 x570. There are several excellent x570 boards in this price range. Most of the x470 boards worthy of an R9 are going to cost $200-$300 anyway.I would HIGHLY recommend not trying to use that CPU with that motherboard, or even with the B450 chipset for that matter. You would be MUCH wiser to look at X470 chipset boards only. Not only does B450 struggle with 8 core Ryzen parts in terms of power delivery and management, but that is just about the worst B450 board out there, bar none.
In fact, you'd likely need to look at A320 chipset boards to find a worse board model to try and run any high end Ryzen CPU on, whether 2000 OR 3000 series.
That may be true on the Intel side (I don't know for sure I haven't seriously looked at b360/b365 VRMs) but it's patently false when discussing b450 and x470 boards. The flagship x470 boards have the best VRM's available. This includes 7 boards plus some Wifi variants. Many other x470 boards have exactly the same, and in some cases worse, VRM designs/components then their B450 counterparts. You are making an apples to oranges comparison on the Intel side. B450 is a budget overclocking chipset where many of the board partners built capable b450 VRMs on certain motherboards. B365 is intended for locked CPUs adhering to strict TDP limits. Furthermore, the new CPU's are extremely power efficient and don't draw very much current. Overclocking headroom is extremely limited on these new CPU's making many b450 and crappy x470 boards perfectly suitable for zen 2 8 cores. Even overclocked.The chipset has EVERYTHING to do with power delivery, because the manufacturers base what power delivery designs to include with a motherboard off of what that particular chipset is likely to be used FOR and WITH.
For example. You would never see the same kind of power delivery configuration on a B360 board that you would see on a Zxx series board. So while the chipset is of course not responsible FOR power delivery, it still has a great deal to do with the probability of what they ARE going to pair it with in terms of component quality and capability. Low end chipsets don't get high quality components OR extensive power delivery configurations.
As for the Gigabyte board with the creative marketing power phase design, I guess I missed that one among all the others using "fake" doubled designs. A mentioned a lot has to do with the power handlers and other components used, but after looking more closely at that board's VRM design then I'd agree it's just as bad as the others.
The bottom line here is that you are going to get (mostly) what you pay for in terms of power delivery. You don't get good VRMs at budget prices for the most part AND even less so now that there are various political and material availability concerns as well as import duties and tariffs involved to an extend far beyond what has been commonplace for the last several years.
I'd just focus on buying the best motherboard and power supply that I can fit into the budget, as these are going to have a big impact on performance and operation for any Ryzen CPU, and make choices regarding the rest of the hardware around whatever is left afterwards in terms of budget.
A properly designed four phases VRM is all anyone needs for normal use, ridiculous phase counts are mainly for overclocking beyond the normal power range where per-phase losses and board power dissipation even of a good VRM design may become issues. This usually doesn't happen until about 150W or about 4W of losses per phase, which is what the square inch of PCB space a phase typically occupies can dissipate.What you WON'T find, EVER, are board models on the lower end chipset boards that are as good as the VRM configurations on SOME of the higher end chipset boards.
Let me clarify something I said earlier that I think you misconstrued, or I simply didn't convey my meaning about well enough.
When I say the chipset has everything to do with the VRM configuration, and without going through it all again, what I meant was this. On a lower end chipset you CAN, yes, CAN, have some models with VRM configurations that are as good as SOME models on the higher end chipset boards.
What you WON'T find, EVER, are board models on the lower end chipset boards that are as good as the VRM configurations on SOME of the higher end chipset boards.
For example, the VRM configuration on a B or H series Intel board will not EVER be as good as it is on the higher end Z series boards. There may be B or H series boards with VRM configurations that are equal to some of the lower end Z series boards, but NONE of them will be up to par with the better mid to upper tiered boards from the unlocked chipset that is specifically intended for mid range to high end overclocking.
On AM4, yes, there are B450 boards that have VRM configurations that are just as good as SOME of the lower end X series boards. But there are NO, NONE, NON, NEIT, (Are we seeing a pattern here?) B450 boards that have VRM configurations as good as ALL of the X series boards, hence the higher end X470, X570 chipset has EVERYTHING to do with having a higher end VRM configuration, at least on the boards that DO have a higher end configuration, because they cannot be found on any of the lower end chipset boards.
There are NO B350 or B450 boards with 6, 8, 10 or 12 phase VRMs. Those are ONLY found on X series boards. Therefore, clearly, the chipset has everything to do with that. By intent.
COULD they put more power phases and higher quality components on these boards with lower end chipsets?
Sure. Of course they COULD.
Do they? No. Because they ARE lower end chipsets, and by intent, they are not meant for use under the same kinds of conditions or for the same level of hardware that the higher end chipset boards were designed for. That, is by design, and is why they ARE cheaper to buy.
Don't let fancy heatsinks fool you: the junction-case thermal resistance of TSOP style packages typically exceeds 20C/W vs less than 5C/W for the drain pins. Unless the heatsink is heatsinking the pads the drain pins are connected to, you would have better results scrapping the heatsinks then replacing them with a fan blowing air at the VRM FETs and their drain pins/pads to keep the PCB itself cooler.There are disadvantages and advantages to using a 4 phase VRM. The disadvantages are fairly easy to overcome with good heat sinks and high switching frequency.
Jeez dude. I thought I was stubborn.