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Custom MOSFET Heatsink -- ASUS Z97-WS

post #1 of 4
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I just got this board for a new build (haven't used it yet, waiting on 4790K pre-order), and while it has pretty good heatsinks all around, I see two MOSFETs exposed. Knowing they can heat up, I'm thinking about adding a little heatsink to help transfer thermal energy to the air. I have some of these heatsinks left over from a previous project. One can cover both MOSFETs and would hang over a little (up and down as seen in the image below).

Even though I feel like this generally isn't an issue, one worry I have is that it will increase capacitance and maybe that's why the heatsink doesn't cover them in the first place. Also, I'm not sure if I should use the easily removable adhesive backing to err on the side of caution, or if I should use my Arctic Alumina thermal epoxy which I'm sure would work much better, the problem being that it would be permanent. I'm also thinking I could push the heatsink up against the big one already there with some thermal paste in between to help spread out the heat. I'm just in a brainstorming phase and I'm wondering if anyone has any advice for me as I have never really done anything like this to a mobo before. Is this a waste of time or should I do it? How would you do it?

post #2 of 4
Quote:
Originally Posted by soldier9599 View Post

I just got this board for a new build (haven't used it yet, waiting on 4790K pre-order), and while it has pretty good heatsinks all around, I see two MOSFETs exposed. Knowing they can heat up, I'm thinking about adding a little heatsink to help transfer thermal energy to the air. I have some of these heatsinks left over from a previous project. One can cover both MOSFETs and would hang over a little (up and down as seen in the image below).

Even though I feel like this generally isn't an issue, one worry I have is that it will increase capacitance and maybe that's why the heatsink doesn't cover them in the first place. Also, I'm not sure if I should use the easily removable adhesive backing to err on the side of caution, or if I should use my Arctic Alumina thermal epoxy which I'm sure would work much better, the problem being that it would be permanent. I'm also thinking I could push the heatsink up against the big one already there with some thermal paste in between to help spread out the heat. I'm just in a brainstorming phase and I'm wondering if anyone has any advice for me as I have never really done anything like this to a mobo before. Is this a waste of time or should I do it? How would you do it?




What are the marked as?

Enzotech makes some nice tall and short IC heat sinks that may work out.


Can you please remove heat sink and share photos of VRM? I am interested in the design of VRM on this MB.


Very nice MB. Thinking about getting one.
B.K.T.
(24 items)
 
  
CPUMotherboardGraphicsGraphics
De-Lidded direct die mount Intel i7-4790k No IHS ASUS Z97 WS Sapphire HD7950 OC 950mhz Edition Sapphire HD7950 Vapor X 
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GSkill 2400mhz CL9  Samsung 840 caviar black Hitachi 
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OCZ AGILITY 4 LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  
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BenQ XL2410T SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW 
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Steel Series sensei Steel Series sensei SS Experience I-2, SS 9HD Audio Technica ATH-AD900 
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B.K.T.
(24 items)
 
  
CPUMotherboardGraphicsGraphics
De-Lidded direct die mount Intel i7-4790k No IHS ASUS Z97 WS Sapphire HD7950 OC 950mhz Edition Sapphire HD7950 Vapor X 
RAMHard DriveHard DriveHard Drive
GSkill 2400mhz CL9  Samsung 840 caviar black Hitachi 
Hard DriveOptical DriveCoolingCooling
OCZ AGILITY 4 LG 16x BD burner DT Sniper CPU block Watercool HEATKILLER® GPU-X³ 79X0 Ni-Bl  
CoolingCoolingCoolingOS
Swiftech pump 655 Alphacool NexXxos UT 60 420mm 3x140mm Bgears 1800 RPM fans in pull on radiator Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
BenQ XL2410T SS 6gv2 Seasonic Platinum 860 Silverstone Raven RV02-BW 
MouseMouseMouse PadAudio
Steel Series sensei Steel Series sensei SS Experience I-2, SS 9HD Audio Technica ATH-AD900 
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post #3 of 4
those aren't MOSFETs in charge of the VRM, i doubt they would impact performance or get too hot. but yea do share whats under the heatsink. Its either IR3550 or the NexFETs.
X99 Main Rig
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X99 Main Rig
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel 5960X Extreme Edition @ 4.5GHz Always Changing VisonTek R9 290 G.Skill Ripjaws 4 16GB (4x4GB) DDR4 @ 3200MHz 
Hard DriveHard DriveHard DriveCooling
Samsung 128GB M.2 PCI-E 4x SSD Apotop 256GB SSD 1.82TB NAS Noctua NH-D15 with both fans 
OSPower
Win7 Pro Enermax 1000W 
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post #4 of 4
Do you think you can provide me the measurements of the heatsinks?

I'm actually planning to do a new heatsink for this board. Mine has yet to arrive though.
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