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AMD Ryzen 9 3900X Tested on Cheap B350 Motherboard

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Benchmark Scores CB R15 64bit: single core 99p, multicore 647p WPrime 1.55 (8 cores): 9.0 secs
VRM needs cooling with a fan pointing on it when the cpu is watercooled, or else... :banghead:
 

WaraiOtoko

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Thanks for the test, that board handled it quite well.

I know you must be overwhelmed with all the testing right now but I would love similar test down the line with better vrm-per-buck board, something like MSI B450 Tomahawk.

Another interesting data point would be how these low-end vrms affect PBO as vrm temps seem to be part of that algorithm.
 
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Nice to know that the whole throttling and temperature-treadment works even on the older 50$ boards.
thanks @W1zzard

Maybe you can write something about the VRM-Cooling-Problem directly in the X570 vs. B350 diagram, to better the TL,DR-efficiency.
Like " VRM-throttling because no airflow around socket." @W1zzard

good job AMD
 
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W1zzard

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I love the marriage of clickbaity title and even Youtuber lookalike thumbnail for this review, with the actual content. This is some really good stuff, very useful, to the point, and not forcing me to watch your face for 15 minutes :toast:

View attachment 126487

W1zzard's gonna take over the world like this. I feel it. Steve is toast! :rolleyes: (just like that VRM under water...)
I didn't know what else to use for the title and small image. Not a fan of these clickbaity images
 
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but ... just works
 
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msi still not release any bios for their b350/x370....i'm still holding x370 titanium and gaming pro carbon ( cross finger)
 
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Most B350 use uber crap mosfet, MSI/Asrock used Nikosem fire-fet and Gigabyte similar junk as Asus (4C09B/N+4C06B/N). Best part is that both Gigabyte/Asus went the same root for B450, out of 10 people who buy B450 8 are buying MSI due to the fact that they switched to better Mosfet and bigger heatsinks. Even one of the worst MSI B450 the B450M PRO-VDH Plus will be miles ahead Vs the other manufacturers B450's.
 
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all for science :)
3950X in september on a B350 ?
I'm just amazed, I went out and bought the absolute cheapest board I could find on b350 around zen1 launch.. yet now a 3900x is chugging along on one...
also the same motherboard people said doesn't handle the 8 cores but 3.9 1700 for almost two years... it does 4050 on a x370 so I assume it ripples worse than the north sea.
 
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Thank you so much for all the work you put into this. :) I've been reading your reviews for over a decade now and you guys are consistently the best when it comes to how thorough and consistent you are, and I love that for people that want to get a performance or power efficiency overview you always have a performance summary.

I have a question that many of us with X370 and B350 motherboards have been wondering about upgrading to Ryzen 3rd gen: does installing one of these CPUs onto these motherboards present the option of enabling Precision Boost Overdrive (PBO) and PBO options like Auto OC? If they do, are they working as intended/just like X570 as long as temps are within spec? The reason I ask is because Robert Hallock from AMD stated PBO should be an option that is presented by the motherboard if it detects there's a Ryzen 3rd gen CPU installed and some people wanted clarification into whether that was the case or if it's something that's still up to the motherboard manufacturers--in which case we won't get it.

Again, thank you so much for all your amazing work!
 
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Good to know things don't appear much different on the lower end MBs when pairing the Zen 2 chips. I'm sitting here reading through all these reviews, wishing I had a good $400-500 to spare to get a new CPU/MB/RAM.......I can dream.....I can dream.
 
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Now I feel kinda proud of my mobo!
 
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so a nice B450 is a good way to go then
 
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probably wont work ever
Oh not again please. There is nothing magic on this subject and nothing wrong with ‘cheaper’ chipsets.

 
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so a nice B450 is a good way to go then
B450 was already a good way to go.

What is interesting is that even B350 boards can hold these CPU's just fine !
(And they are dirt cheap today... I don't think they will last long, if everyone and their dog buys 3600, 3700X and some 300 generation chipsets)
 
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sounds like a golden B350 board. I'm impressed that the VRM managed to handle the beastly R9 3900X without making the magic smoke or sparkles.
Not at all, 105w back then was quite normal on 1700x, 1800x.

VRM needs cooling with a fan pointing on it when the cpu is watercooled, or else... :banghead:
Exactly, that is something I did not understand. Why change the cpu cooling while the vrm was the thing was very hot hehe

so a nice B450 is a good way to go then
There is nothing better for the price than a b450 if going for maximum 3900x undervolt it and keep at stock clocks.
 
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Looks like those little stick on heat sinks are gonna start selling again.

$8 for 20
 
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Looks like those little stick on heat sinks are gonna start selling again.

$8 for 20
Heh, I added some I had from a VGA cooler to my motherboard a year ago. Future proofing.
 
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sounds like a golden B350 board. I'm impressed that the VRM managed to handle the beastly R9 3900X without making the magic smoke or sparkles.
I've been drawing 180 watts through my ab350m pro4 for 20 months now, 24/7, it's never really idle either.
it's so crusty, it was the cheapest board I could find.
you can find them at 75$ and probably cheaper
 
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