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Dysthymia
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Ryzen 3000 on ITX B450 VRM question

Sun Jun 30, 2019 5:48 pm

So I have been planning new builds for myself and the home server, and I have everything purchased now except for the Ryzen 3000 CPU[s]. After reading that it basically had the best VRM and seeing the price, I went with an MSI B450i Gaming Plus AC board for both systems -- one is replacing my existing server in a Node 304 case, and another is going in an H200. I have good aftermarket air coolers for both.

My question is -- assuming I don't overclock, will this motherboard's VRM be able to deal with a Ryzen 3900X? The Node 304 has the standard two small intakes and one exhaust and I purchased a Noctua U12A for it. The H200 has a SFF PSU with Noctua fans replacing the stock ones in the stock configuration, and I purchased a Dark Rock Pro 4 for it. I do plan to make full use of the CPUs, whether I have them folding, mining, or encoding videos.
 
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Re: Ryzen 3000 on ITX B450 VRM question

Sun Jun 30, 2019 6:40 pm

Who knows. We don't know anything about the turbo behavior of the 3000 parts. We're living in the day and age where 95 or 105 watt TDP's mean 155 watt+ power draws. We'll find out in a week.

Great board by the way. I have the same one for a R5 2400g Apu build.
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just brew it!
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Re: Ryzen 3000 on ITX B450 VRM question

Sun Jun 30, 2019 7:07 pm

Assuming they've got a BIOS update for Ryzen 3000 series I don't see why it wouldn't work.

Are you doing a lot of on-the-fly media transcoding or other compute-heavy workloads on your server? If not, the 3900X is massive overkill for a home server...
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Dysthymia
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Re: Ryzen 3000 on ITX B450 VRM question

Sun Jun 30, 2019 8:14 pm

just brew it! wrote:
Assuming they've got a BIOS update for Ryzen 3000 series I don't see why it wouldn't work.

Are you doing a lot of on-the-fly media transcoding or other compute-heavy workloads on your server? If not, the 3900X is massive overkill for a home server...


Yes. The server hosts Plex, Minecraft, a Windows virtual machine, and will be running Handbrake or RipBot264.
Edit: I realize Plex (with multiple simultaneous 1080p transcodes) and Handbrake/RipBot264 are the only notable uses for a 12 core, here.

From the 6 core to the 12 core, the Ryzen 3000 offerings are all about ~$41/core. There's no real price penalty for going 12 core over 8. And it seems like AMD has been more strictly adhering to the power usage that they indicate for their CPUs... It is an MSI board though, maybe I should check for MCE? I'm just worried that since I'm not using downdraft coolers, it might get too toasty.
 
Dysthymia
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Re: Ryzen 3000 on ITX B450 VRM question

Tue Jul 02, 2019 8:02 am

If anyone else is interested, I found a resource on this here.
 
Srsly_Bro
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Re: Ryzen 3000 on ITX B450 VRM question

Sun Aug 18, 2019 2:00 am

This review might help.

https://www.techpowerup.com/review/amd- ... therboard/

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Re: Ryzen 3000 on ITX B450 VRM question

Fri Sep 20, 2019 3:07 pm

I don't remember where I read it, but under load a 3900x apparently doesn't pull more power than a 2700x thanks to its die shrink. People ran 2700x's in B350 and B450 motherboards all the time, so unless your board has a reputation for a badly underbuilt VRM it will probably work fine with proper cooling.
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thecoldanddarkone
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Re: Ryzen 3000 on ITX B450 VRM question

Sun Sep 22, 2019 7:54 pm

Concupiscence wrote:
I don't remember where I read it, but under load a 3900x apparently doesn't pull more power than a 2700x thanks to its die shrink. People ran 2700x's in B350 and B450 motherboards all the time, so unless your board has a reputation for a badly underbuilt VRM it will probably work fine with proper cooling.


The 3900x takes more power than the 2700x at stock (fyi).
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Re: Ryzen 3000 on ITX B450 VRM question

Sun Sep 22, 2019 9:15 pm

thecoldanddarkone wrote:
Concupiscence wrote:
I don't remember where I read it, but under load a 3900x apparently doesn't pull more power than a 2700x thanks to its die shrink. People ran 2700x's in B350 and B450 motherboards all the time, so unless your board has a reputation for a badly underbuilt VRM it will probably work fine with proper cooling.


The 3900x takes more power than the 2700x at stock (fyi).


Oh. Good to know, sorry about that.
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Waco
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Re: Ryzen 3000 on ITX B450 VRM question

Mon Sep 23, 2019 9:23 am

thecoldanddarkone wrote:
Concupiscence wrote:
I don't remember where I read it, but under load a 3900x apparently doesn't pull more power than a 2700x thanks to its die shrink. People ran 2700x's in B350 and B450 motherboards all the time, so unless your board has a reputation for a badly underbuilt VRM it will probably work fine with proper cooling.


The 3900x takes more power than the 2700x at stock (fyi).

Not much at all, though. If the board can handle a reasonably clocked 2700X, I highly doubt you'll have trouble with a stock-clocked 3900X. The power circuitry on modern boards is pretty stout even on budget boards and unless the board makers lie to the CPU about the capabilities of the board, it will happily run without issue.

https://www.anandtech.com/show/14605/th ... the-bar/19
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thecoldanddarkone
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Re: Ryzen 3000 on ITX B450 VRM question

Mon Sep 23, 2019 3:41 pm

Waco wrote:
thecoldanddarkone wrote:
Concupiscence wrote:
I don't remember where I read it, but under load a 3900x apparently doesn't pull more power than a 2700x thanks to its die shrink. People ran 2700x's in B350 and B450 motherboards all the time, so unless your board has a reputation for a badly underbuilt VRM it will probably work fine with proper cooling.


The 3900x takes more power than the 2700x at stock (fyi).

Not much at all, though. If the board can handle a reasonably clocked 2700X, I highly doubt you'll have trouble with a stock-clocked 3900X. The power circuitry on modern boards is pretty stout even on budget boards and unless the board makers lie to the CPU about the capabilities of the board, it will happily run without issue.

https://www.anandtech.com/show/14605/th ... the-bar/19


While I agree with you for the most part, some b450 boards will not run a 3900x comfortably (or 2700x for that matter). I haven't taken the time to run my 3900x on my b450.

I do expect it to run it just fine. While stressing my 2700x I could touch the vrm heatsinks.

https://www.msi.com/Motherboard/B450-A-PRO
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Waco
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Re: Ryzen 3000 on ITX B450 VRM question

Mon Sep 23, 2019 4:59 pm

https://www.msi.com/Motherboard/B450I-G ... cification

Given it's rated for Ryzen 9, I wouldn't give it a second thought.
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