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VRM on the new AM4 motherboards - Page 117

post #1161 of 2005
Quote:
Originally Posted by bloot View Post

So because I like the K7 so much I tried to put a 12" fan directly on the VRM zone (case open, the fan isn't attached to anything as I have no way to do it)

After 20 minutes of prime 2.91 custom test max vrm mos temp is 66C, but was generally staying between 60 to 65. Still not great temperatures if you ask me, but they're better than before.
Warning: Spoiler! (Click to show)

The fan used is the one labeled as "system pump fan 5" at 1200rpm

It's pretty clear my major problem is the poor airflow vrm area is getting, despite the heatsink Gigabyte provided is absolute garbage, so I ordered this little thing hoping it helps cool it down https://www.amazon.co.uk/gp/product/B005JSA4K4

Wait you have a 12" fan that runs at 1200rpm and connects to a mobo header? The biggest one I can find is 230mm (9")..and those only run at 900rpm and draw I think 0.4A. Where do you buy such a fan?
post #1162 of 2005
Quote:
Originally Posted by bardacuda View Post

Wait you have a 12" fan that runs at 1200rpm and connects to a mobo header? The biggest one I can find is 230mm (9")..and those only run at 900rpm and draw I think 0.4A. Where do you buy such a fan?

It's a pretty old papst no pwm fan, I bought it several years ago, but I also have a noiseblocker b12-p that runs fine at 2000 rpm. I thought almost every fan should run at its rated speed tbh.
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post #1163 of 2005
Well a b12-p is a 120mm fan so not the same thing. The smaller ones can run faster. I've never heard of a papst fan, I'll have to look into it.
post #1164 of 2005
Quote:
Originally Posted by bardacuda View Post

Well a b12-p is a 120mm fan so not the same thing. The smaller ones can run faster. I've never heard of a papst fan, I'll have to look into it.

Sorry I meant 120mm not 12" my mistake biggrin.gif
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post #1165 of 2005
Quote:
Originally Posted by DADDYDC650 View Post

MSI B350m PCB breakdown.

Just finished watching that video, basically it came down to it probably won't catch on fire tongue.gif and buy something better

4 Core Ryzen and 6 Core nothing to really worry about but 8 core on it is....not recommended.
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post #1166 of 2005
Ah ok thumb.gif

Has anyone tried remounting the VRM heatsink on their Gigabyte boards? Maybe with some arctic thermal paste on the vrm side of the new pad?
post #1167 of 2005
Quote:
Originally Posted by bardacuda View Post

Ah ok thumb.gif

Has anyone tried remounting the VRM heatsink on their Gigabyte boards? Maybe with some arctic thermal paste on the vrm side of the new pad?

I already pulled mine to check contact.

Reality is the pads paste are only as good as the sink.

Crap water block (aio) versus a ek...same paste...etc etc.

You get the idea.

As far as temps go lower temps ( within reason ) = longevity with anything silicon related.
post #1168 of 2005
So remounting didn't help any? What about removing the shroud?
post #1169 of 2005
1c when i tested last night. My sunon is no slouch and wired to psu not a fan header.

My two 290x vrms run cooler...then again they are on awesome water blocks.
Edited by chew* - 4/27/17 at 9:48am
post #1170 of 2005
Wow. Hard to believe the sink could be that bad though. The ones on the X370 Gaming boards don't really look any different than the one on my board, and I think the hottest temp I've seen is 63°C in IBT Max @ 1.4V with a 24°C ambient. Did they forget to use metal for the material? lol.
I guess the 'fets just run that much hotter.

EDIT: Wait, though, didn't you measure them with IR and were seeing 40-something when software was reporting 60-something? Maybe the Gigabyte boards are actually measuring choke temp instead of mosfet.
Edited by bardacuda - 4/27/17 at 10:07am
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