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VRM and MOSFET cooling necessary?

post #1 of 19
Thread Starter 
Hi, I've had this pc running for a few months now, and I'd like to overclock it. I know how to overclock so that's not the issue, but the problem is my motherboard (in my sig rig) doesn't have any vrm or mosfet cooling around the cpu, and is only a 4+1 phase power design. I'm a little weary about overclocking on this board, having read a few reports of mosfets on MSI motherboards also with no vrm or mosfet cooling setting on fire because of it. I'd like to know if you think it's safe enough for me to overclock it anyway, considering I've not seen any reports of this happening to my particular motherboard, or any motherboard with my chipset? I know there are vrm and mosfet heatsinks I could buy, but I can't be bothered taking my motherboard and everything out of my pc to fit them, so don't suggest them please tongue.gif If you don't think it's safe I'll just leave it stock as I don't really need the performance gain anyway, I'd just like it tongue.gif Thanks in advance smile.gif
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post #2 of 19
Generally, the weaker the VRM, the more cooling it's going to need to operate under high current draw (an X6 qualifies) safely.

Fire up LinX, IBT, or Prime let it run a few minutes, then press one of your fingers right onto a MOSFET. If you recoil in pain immediately, you really should invest in some cooling.
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post #3 of 19
Quote:
Originally Posted by ajw93;11936142 
Hi, I've had this pc running for a few months now, and I'd like to overclock it. I know how to overclock so that's not the issue, but the problem is my motherboard (in my sig rig) doesn't have any vrm or mosfet cooling around the cpu, and is only a 4+1 phase power design. I'm a little weary about overclocking on this board, having read a few reports of mosfets on MSI motherboards also with no vrm or mosfet cooling setting on fire because of it. I'd like to know if you think it's safe enough for me to overclock it anyway, considering I've not seen any reports of this happening to my particular motherboard, or any motherboard with my chipset? I know there are vrm and mosfet heatsinks I could buy, but I can't be bothered taking my motherboard and everything out of my pc to fit them, so don't suggest them please tongue.gif If you don't think it's safe I'll just leave it stock as I don't really need the performance gain anyway, I'd just like it tongue.gif Thanks in advance smile.gif


Is it safe to OC without VRM and mosfet heatsinks? Yes. Does it exponentially increase the possibility of catastrophic failure? HELL YES!

Lets put it this way- the risk is large enough that if you are worried about damaging your equipment I would say don't do it - I say this as being one of those MSI owners that had the mosfets go boom. But then again that was on one of their boards lacking the pre-requisite cooling, on my GD80's they truck like a champ.
    
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post #4 of 19
4+1 phase is fine. The only reason the MSI boards failed is because out of the box the heatsinks make poor contact. You will be perfectly fine to overclock with something like this or this.
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post #5 of 19
Quote:
Originally Posted by Blameless;11936167 
Fire up LinX, IBT, or Prime let it run a few minutes, then press one of your fingers right onto a MOSFET. If you recoil in pain immediately, you really should invest in some cooling.


Well at least he didn't say touch your tongue to it. You can just buy aftermarket heatsink for a little amount of cash. Also could chop up some old school ram heatsink that was the stick-on-kind. Or aim a case fan towards them for the time being.
post #6 of 19
Thread Starter 
That's another problem, my heatsink is so big I can't get my hands in to touch the MOSTFETs, I've run prime95 on my pc for a few hours and done 20 passes of LinX before though to check weather I'd fixed my memory issues, and it was stable so I know the MOSFETs must be stable at their current temperature.
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post #7 of 19
Quote:
Originally Posted by ajw93;11936142 
Hi, I've had this pc running for a few months now, and I'd like to overclock it. I know how to overclock so that's not the issue, but the problem is my motherboard (in my sig rig) doesn't have any vrm or mosfet cooling around the cpu, and is only a 4+1 phase power design. I'm a little weary about overclocking on this board, having read a few reports of mosfets on MSI motherboards also with no vrm or mosfet cooling setting on fire because of it. I'd like to know if you think it's safe enough for me to overclock it anyway, considering I've not seen any reports of this happening to my particular motherboard, or any motherboard with my chipset? I know there are vrm and mosfet heatsinks I could buy, but I can't be bothered taking my motherboard and everything out of my pc to fit them, so don't suggest them please tongue.gif If you don't think it's safe I'll just leave it stock as I don't really need the performance gain anyway, I'd just like it tongue.gif Thanks in advance smile.gif


I had to do it because my mosfet was throttling down my overclock...... I can run 3.8 on all cores now..... I f I run it at 4 GHz they get hot and throttle down big time.

It sucks but I have a micro so it is what it is. thumb.gif
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post #8 of 19
Thread Starter 
Thanks for your input but it's just too much effort for me to dismantle my rig to put the heatsinks on, considering it's fast as hell as it is biggrin.gif I think I'll go with you werds and not bother with overclocking because I am quite worried about destroying my hardware frown.gif
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post #9 of 19
I would say then possible your larger cpu cooler is providing some cooling to them then. If it is stable then no worries then. I always like to keep a mini infrared thermometer handy.
[ame="http://www.amazon.com/Fluke-62-Mini-Infrared-Thermometer/dp/B000MX5Y9C"]Amazon.com: Fluke 62 Mini Infrared Thermometer: Home Improvement[/ame]

Though you can get them a little cheaper i like fluke's products.
post #10 of 19
Thread Starter 
Quote:
Originally Posted by Wenty;11936223 
I had to do it because my mosfet was throttling down my overclock...... I can run 3.8 on all cores now..... I f I run it at 4 GHz they get hot and throttle down big time.

It sucks but I have a micro so it is what it is. thumb.gif

Oh I just saw that Wenty, I've overclocked it before and it ran at 4GHz fine without throttling but I never kept the overclock because of my fear of burning the board.
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