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Is my motherboard OK for overclocking?

post #1 of 9
Thread Starter 
Hi,
(First post on this forum, but I'm a long time lurker)
I've been recently considering overclocking my processor, however I'm not sure if my motherboard will be OK for this. My spec:

DFI Lan Party 790FXB-M2RSH, Phenom 965BE,
2x Sapphire 5750, 4GB G.Skill DDR2-800, 500gb WD,
CM 212+, TX650w, NZXT M59

I'm ready to begin, but I'm kind of worried about the VRM/Mofset (or whatever it's called) portion of the motherboard. It's 4+1 phase and the little black boxes next to the heatsink are very much hot to the touch. Not too hot to touch, but hot enough that I wouldn't want to keep my finger on one for more than a few seconds.

I've not got any fans blowing at them. Hopefully this picture explains better:

487
(The black boxes circled are hot to the touch. The Mofsets obviously have a heatsink on them.)

I'm assuming/have heard that those little black boxes are pretty much part of the whole VRM system. I want to make sure that, heat wise, this is going to be ok with a moderate overclock. I haven't really got the cash to replace the motherboard if something blows up. Besides, it needs to last another couple of years at the very minimum - the system will likely be re purposed after I replace it.

Another question which is semi related - I've heard that, if you have 8 pins on the cpu power connector, you should plug both plugs in. I only have the top one plugged in as the cable does not reach. Does this affect overclock stability much or at all?

Thanks in advance and I hope this isn't too much of a stupid question.
post #2 of 9
firstly DFI Lanparty boards are great overclockers, all you would need to do is get some airflow over the MOSFET heatsink.

the chokes (the grey boxes your referring to) do get warm to mildly hot, all they are is a iron core wrapped in copper wire then installed in a plastic shell and dipped in epoxy resin. they can take a fair amount of heat before they get close to dying. im sure that you would be fine with a 400mhz overclock on the cpu.

as for the cpu power, having an 8pin is preferable as it supplies more current to the VRM's if it is needed. having only a 4pin plugged in would half the current available. i think in your case with starting out you shouldnt need that much power coming from the VRM so the 4 pin would be fine.

as i said a 400mhz should be your realistic goal. issue some have when first starting to overclock is not taking it slowly, getting impatient and adding too much voltage for an unrealistic gain, and thats when things go wrong.
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CPUMotherboardGraphicsRAM
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60GB OCZ Vertex II / 3x 500GB Samsung Spinpoint EK Supreme HF Nickel, EK DCP4.0, Stealth GT 360... Windows 7 Ult 64bit Acer 22" G225HQ 
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post #3 of 9
Thread Starter 
Currently I don't really have a target - my goal is mostly one of learning. I currently don't have any intention of going much higher than the stock voltage. I'm usually quite paranoid about these things. Like I say, my goal is one of learning - I don't want to break anything. If I get a bit of extra CPU power then that's great - 400mhz sounds like a good target. I don't want to get too carried away =d.

As for airflow over the MOSFET heat sink, how would I accomplish this? I currently have one exhaust fan directly next to it blowing air out from behind the CPU heatsink. I'm going to be attaching another fan to the roof above the CPU heatsink (and the general MOSFET area). I don't see how I can aim a fan directly at the MOSFET though - there just isn't anywhere to mount them like that. Are there some form of specialist fans that you can attach this way?
Edited by Daichin - 1/10/12 at 12:28pm
post #4 of 9

This mobo actually has an awesome VRM setup with plenty of capacity but you will ideally want to active-cool the area; with the power phase count being smaller at 4+1 and the chokes so close they can definitely get quite hot.  Use a small fan or an Antec Spot cool fan.

post #5 of 9
Thread Starter 
Thanks! I'll definitely be grabbing one of those Antec Spot Cool fans before I begin overclocking. I can't think as to how I could aim at smaller fan at the VRM's although I do have plenty lying around.

EDIT: Wow, those things are shockingly expensive (almost a third of what I paid for the board) and/or out of stock where I live. If they are quality VRM's, how much does active cooling really matter or is it just an exercise in paranoia?
Edited by Daichin - 1/11/12 at 5:21am
post #6 of 9
g.gif I currently have one exhaust fan directly next to it blowing air out from behind the CPU heatsink.
post #7 of 9
That's not that much expensive ?
Antec SpotCool
post #8 of 9
2 words - cable ties.




Just get one of those small fans as close as you can. This will probably be determined by the size of your cooler. If you're still using the stock cooler, change it! Decent air coolers tend to give some airflow to the surrounding board.
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post #9 of 9
Thread Starter 
Thanks for the replies everyone! I've ordered an antec spot cool fan - I managed to find one for a price close to that amazon.com one. Hopefully that should do the trick.

One final question (and this one is most likely very stupid, but...) - Does having both cpu plugs plugged in (8 pin vs 4 pin) make any difference to the mosfet temperature etc?
Edited by Daichin - 1/13/12 at 4:04am
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