GA-970-DS3 vrm mosfet cooling advice

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explainitlikeimanidiot

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Nov 3, 2009
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Hi all.
I am upgrading my system at the moment and want to look at cooling. I have a fx 6350 cpu on its' way and would like to look at the vrm/mosfet cooling.
Any advice on what to use and where to get it? I'm uk based. I have seen some copper jobbies from enzotech and scan uk have some heatsinks, but i'm not sure what to get or if it will fit.

Advice appreciated
 
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Easy way: *hm... you have a lot mosfets to cool down here - better use hard way method 😉
http://www.ebay.com/itm/Enzo-Tech-Pure-Forged-CopperLow-Profile-MOSFET-Cooler-MOS-C10-/391019576881?hash=item5b0a953e31
http://www.ebay.com/itm/Enzo-Tech-Copper-MOSFET-Cooler-10PK-MOS-C1-/271691299892?hash=item3f42103c34

Hard way:
Take old CPU box cooler and cut it in right dimensions and mount in on VRM section :)
Similar cooler to this http://c.shld.net/rpx/i/s/pi/mp/2497/prod_5152576316?src=http%3A%2F%2Fimages.shopletcdn.com%2Fproductimages%2F300x300%2F10863448.JPG&d=cc79b4bf3ce2a4eddf08c136cfcfa8e1aee3dc89&wid=140&wid=180hei=140
 
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MOSFET heatsinks & thermal pads are worthless mate.
There's not enough heat transferral through the pads to make a difference unless you're prepared to drill the board & fasten a block down using sprung screws & silver based compound.

On a board like the ds3 which has a 4 phase vrm albeit very good mosfet quality is plain & simple airflow.
What I can't recommend highly enough (from personal experience as I use it myself ) is a raijintek Pallas.

https://www.overclockers.co.uk/showproduct.php?prodid=HS-005-RT

This is absolutely 100% all you need for cooling & stability with a 6350 on your board.
 
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I argue with you about this before I installing heastinks via thermal pads I have Voltages drops on VRM in range 0,126V
after installing heastinsk I have only drops in range 0,05V * and I can lower CPU Vcore from 1,525 to 1,45V.
This guy recommend me using thermal pads on VRM http://hwbot.org/user/ivanov/ * and he know what how to OC 😉
Everything depends about quality thermal pads if you buy cheap low quality one they will no help you.
 
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Thanks. I got a good deal on the 6350. Due to that and the fact that I have no vrm cooling and 4+1 power phase, I was dubious about overclocking. Apparently the stock 6350 heatsink is better than the 6300 also? I was just dubious about oc on this board. I also want to overclock my 7850 and not sure if the mobo is affected by this or just the power supply?
So heatsinks are no good unless compressed in place, or thermal pads are no good unless compressed?
Would an extra fan be enough?
 
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Thermal adhesive pads are good enough.
I use this http://www.alphacool.com/product_info.php/info/p946_Alphacool-double-sided-thermal-adhesive-pad-100x100x0-5mm.html
But also 3M brand is good.
My mobo VRM :
A88_XM_1.jpg
 
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The stock 6350 pulls far more vtage/wattage than an overclocked 6300 - thats a plain & simple fact.
Amd overstate the voltage when they program the die on the 6350 for the base clock increase just to 100% ensure stability (you can't honestly expect them to test every chip they produce) - you can undervolt it yourself easily enough .

Good quality Vrm sinks may drop temps a few degrees with the stock cooler - IMO though they're a waste of time & money for the result.
That gigabyte board will manage a 6350 as it stands with the stock 6350 cooler (it is a twin heatpipe one also supplied with the 8 core chips)

Tried vrm sinks & assorted coolers on the little Asus board in my SIG (the vrm's are about the same quality as yours)

Tried Combinations of the enzotech vrm sinks above with a stock 8320 cooler ,a big shuriken downblower ,a zalman cnps5x mini tower etc.
Results were all fairly similar , apart from a tower cooler with the vrm sinks actually increased vrm temps by 3c due to lack of airflow.
The sinks dropped literally 2c off the temps in conjunction with a downblower - we were looking at 40-50c vrm temps with my 6300@4ghz- in spec not dangerous but in a quest to lower further I purchased the Pallas ,removed the vrm sinks (they were touching the pallas bottom as theyre high).

We are now looking at a rock solid 4.3ghz with a max CPU temp of 55c under prime testing & - wait for it - max vrm temps of 26c after an hour of prime testing.

If you have an understanding of his impressive that is on a 4 year old 4 phase 760g board you can u derstand why I recommend it above any other option suggested.
Its fairly expensive but ultimately 110% worth it.


These readings were not done via unreliable board sensors but with a physical decent quality hl150 infrared thermometer.
 
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Just an update.
I have installed a noctua nh-l12 which came with 2x nf-s12b-redux and 1 x nf-b9-redux.
I swapped the side case fan, a coolermaster 140bc with one of the 120 noctua fans and the 80mm exhaust fan (about 12mm thick) that came with the case for the 92mm fan. I fitted the cooler with one 120mm noctua fan on the top. I used prime 95 blend for 10-15 minutes on the standard cooler and had 68deg. I turned off auto voltage and dropped to 1.275 (1.250 would not boot) and got 64deg with tmpin0 at 35 tmpin1 at 70 and tminp 2 at 76.
I fitted the noctua fans and cooler and repeated at 1.275 and had 43deg and 33,51,55 on tminp0,1,2.
I got the noctua purely because it meant that I did not have to remove the motherboard (no hole at the back of it in the case) and I was a little trigger happy on ebay.
I had decided 100% to take madmatt30s' advice and get a topdown cooler, whichever one it might be. Very glad I did.

Thanks all for the advice.

Now to look at undervolting
 
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