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Improving VRM Cooling with FX-8350

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anonymous9

New Member
Joined
Aug 3, 2016
Hi guys,
I've installed a closed-loop watercooler on my 8350 but now I'm having problems with voltage drops and FPS spikes (even when simply watching a video, for example). As you can see in the attached picture, cooling around the VRM is less than ideal:
OZsLsgG6DvO9gB3zoEIUAfE211PJpqlwn9_-apdt2QQi_eoHI1_JdXptTyRuaXSrHXfXRas6mWtt-ZZI--dcVtFCp4_y1GrgDyQGoz44HonI6dQDS3flfr1onrY4lIZSMTm3iog9vJ4lZID7dXX5oQSKTfMVT_b1TbeqFmEPnsV5z_S_uA8lya_cvGbvUc09ZZVHyMCNpFzIBW4a35wLfx2E1m-TZDy2xS_z9jEd8ky1k-f0MhYWV35K83oAkia2yPxbELg-VuOkZaBqDr4dfxoyaRA4J1bq_Sr1skuc4NOKusfMVr2-B2flJnBqrDroAuchaPF_mxnfwblPMrUItpCxK2Cs-z0Okb9MCR_MItYLc1n7pShweFA5-ASzFzFZDOgZElCmrV_c3XDvo1SHnGZWoI05LSroSkcCxvSkWDSwbNQK0i9rrTxOCH56r1dcSOd4IRpfpEgIJvM_0CSX7O-cO738pnvrGfIGlac6hMADBpG7fnj0goV3UhGDRiZDplGZWkmIoMGDz6e-rPCvGknNP3AvmNE5Mdrh7GYTNO9Jife1vMd99CB3zveukEehtYmmGIAkGAKGF_tOUliCdivvtcVRPqI=w1709-h963-no


So I'm thinking of switching my ASRock 970 Pro3 R2.0 board with 4+1 power phasing to a Gigabyte GA990FXA UD3 R5 with 8+2 power phasing. Apparently it's a known issue with ASRock 970 boards as they need active cooling for the components surrounding the CPU, so switching to a 990FXA board with a better VRM and included heatsink/heatpipe should (I think) solve the drops in VCore.

Just wondering if I can get any input to how effective this might be as well as other ideas for improvement.

Current PartPicker List: http://uk.pcpartpicker.com/list/FVP9Gf


Thanks all
 
OP
A

anonymous9

New Member
Joined
Aug 3, 2016
That MB will handle the FX-8350 just fine.

How about the VRM cooling? Kinda worried cause it's still a bit of a dead zone for air movement, thats why I'm hoping the heatpipe between the VRM and NB should help spread it out a bit but I'm not too sure if it's worth the upgrade cost
 

Tír na nÓg

Member
Joined
Sep 19, 2015
Stick a 92mm fan on the VRMs heatsink (I usually use thick double sided tape, or use a wood screw in any of the heatsink hole).

You can also use a fan at the back of the motherboard, like this (it is a x99 socket, but it works all the same on a AM3+). Socket temps dropped by 7/8c on my X99 Extreme6/3.1.
backplate 2.jpg
backplate 1.jpg
 
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A

anonymous9

New Member
Joined
Aug 3, 2016
Stick a 92mm fan on the VRMs heatsink (I usually use thick double sided tape, or use a wood screw in any of the heatsink hole).

You can also use a fan at the back of the motherboard, like this (it is a x99 socket, but it works all the same on a AM3+). Socket temps dropped by 7/8c on my X99 Extreme6/3.1.

Thanks for the ideas Tír na nÓg, but my ASRock board doesn't even have a heatsink on the VRM, tbh I think I expected a little too much for a relatively cheap 970 board :p

Might try sticking something on the back though, I was also thinking of attaching a fan to the back of the GPU to push air up and out of the top exhausts, but it really seems like just delaying the inevitable at this point
 

caddi daddi

Godzilla to ant hills
Joined
Jan 10, 2012
"but it really seems like just delaying the inevitable at this point"

get a better board, you going to let the magic smoke out of all your gear with the one you have.
 
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anonymous9

New Member
Joined
Aug 3, 2016
Okay so I've ordered the 990 board and I'll let you all know how it goes, if it still runs a bit hot I'll have a look at some of these homemade options too
 

SeanJohn

New Member
Joined
Aug 12, 2016
Not only will the 8+2 help but the ability to adjust llc. Does your 970 board allow llc adjustment? My mobo is a rev 1 and doesn't but later rev of my 970 mobo do allow llc adjustment.
 
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anonymous9

New Member
Joined
Aug 3, 2016
I read somewhere my old board supposedly supports it, but I could never find it myself :p

New one's in and temps are much better, never above 60° on load and no more throttling. Still gonna have a look at some extra VRM cooling on the back though (could always be a little better!)