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Jerryrigging MOFSET heatsinks - Page 5

post #41 of 42
Thread Starter 
Quote:
Looks good, though I prefer thermal adhesive/epoxy and you'd likely see a bigger improvement in temps by cooling the back of the board under the mosfets.

Probably true, since I can feel the heat on the back of my mobo. Unfortunately, my case panel wouldn't fit if I attached a heatsink to the back.

As for temps before, I don't know, I didn't have a sensor. However, my fan controller that I just got, I attached a probe in the heatsink, and on the side of the base, and it says about 35-40/32-37 respectively, which is maybe 5*C lower?, at load, with the heatsink. When I touch the metal heatsink it feels slightly warm, so since metal is naturally heat absorbing and thus feels cold at room temperature, this means it's doing it's job of absorbing/diffusing heat.

I sawed up an old stock AM2 heatsink, not any fancy liquid/heatpipe ones.
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post #42 of 42
Thread Starter 
Updating this, I added a fan. I've been overclocking a phenom ii and reseated temperature diodes onto the heatsink, and was getting 91*C if i pushed my vcore to 1.568 (which seemed to cause more instability than help, so i only did that once and stopped 5 minutes in), it's usually at 65-85 depending on my vcore.

Now I noticed my VRM was warm to the touch upon shutting down after a prime95 test, of course (meant that they were working!), so i figured to add a small fan to the set-up. Here's the story in pictures:


40 MM fan (when hooked up, to my surprise, lights up blue/green/red like a christmas tree).


Ripped from this old, 2003 computer found in my dead uncle's garage.


Heatsink, fan on top, this on top of fan, screwed in.

This is how I got the idea to use the fan - there are no special brackets that held this 40mm fan onto the motherboard northbridge (***, why didnt my 2010 biostar a770e3 didnt have a fan on the mobo-northibrdge? I had to jerry rig one on...), it was straight screwed into the heatsink. I, too, would screw my fan directly into the heatsink then, having the heatsink fins hold it in place.


Theres the heatsink, but the rear 120mm hyper 212+ fan would be issues. If I put the fan on top of the mosfeat heatsink, i would have to move up the pull fan a cm or so. Maybe that'd raise cpu temps. maybe that'd lower it, who knows. And, maybe it would stick out too far that I woudnt be able to put my panel back on?

And then there were questions, shoudl I put this fan in a way where it's 'pulling' air through the heatsink, as in, instead of blowing down on it radially like a stock CPU heatsink, maybe I should set it up like a tower heatsink, and have the fan 'pull' air through the mosfet heatsink. Or, maybe with pull? Maybe I could sort of put the fan at an angle, on top of the heatsink, but not quite on top, sort of at an angle, to allow my pull fan to fit in with enough room (didnt give it enough room, so didnt do that).

I decided with blowing down, radially, onto the mosfet heatsink, in order to cool the chokes and capacitors as well as the mosfets and mosfet heatsink.


Notice how it glows! Note the best pic, it does look cool though:


Now maybe I screwed up my temp diodes when putting the fan in, i mean they are tight in there, and I had to remove the motherboard from it's standoffs to get the fan wires behind the motherboard, but I made sure to keep them in place (spent like an hour seating my 2 cpu diodes, god damn they still won't read the cpu temp no matter where i stick them, damn hyper 212+ being exactly the same size as an am3 cpu and direct contact copper pipes taking entire temp load so the top of the base isnt warm at all)...

but I think this fan has resulted in at least 15-20*C of cooling. My vrm temps aren't going above 56*C when the lowest they've ever been under prime95 is 65*C, and more than likely they should read 75*C during prime95 under the voltage I have right now.

Why buy a high end motherboard? Just buy the cheapest piece of **** you can find and slap mosfet heatsinks and a fan on it!
Edited by Belial - 11/13/12 at 6:06pm
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Colonial Blue Paracord Sleeving 
CPUMotherboardGraphicsRAM
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Jerryrigged VRM Heatsink (sawed off stock AM2 h... Hax'd W7 Ultimate 64bit Sanyo DP19640 19"1360x768 Ducky Cherry Browns 10keyless 
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Hard DriveCoolingOSMonitor
Samsung 830 128gb Corsair H110 w/4x 140mm Yate Loon High Blues W7 x64 Ultimate Yarrgh Matey Dell U2312HM Matte IPS 1080p 
MonitorMonitorKeyboardPower
Sanyo DP19640 18.5" 768p KDS Rad-7xp 1024p CM Storm Quickfire Rapids Brown Rosewill Capstone 750 
CaseMouseMouse PadAudio
Bitfenix Shinobi Modded CM Storm Spawn Steelseries Diablo 3 2 set CD Speaker + Big Sub 
Other
Bitfenix Recon Fan Controller Moded 
CPUMotherboardGraphicsRAM
Delidded i7-3770K 5GHz@1.499 Gigabyte Z77X-UD5H 1.1 Sapphire Dual-X 7950 3L Boost 4x2GB Mushkin Ridgeback 2200mhz 8/11/8/27 1.75v... 
Hard DriveCoolingCoolingCooling
Intel X25-M 80GB SSD NH-D14 SE2011 Noctua 120/140/140 Fans 3 x Yate Loon Mediums (Petras) 2 x NZXT Havik 140mm Fans 
OSMonitorMonitorKeyboard
Hax'd W7 Ultimate 64-bit Sanyo DP19640 19'' KDS Radius Rad-7xp 17'' Ducky 1087 MX Brown 10keyless 
PowerCaseMouseMouse Pad
Rosewill Capstone 550w Modular NZXT Source 210 w/Modded Window Razer Deathadder 3.5G Steelseries Blizzcon D3 
AudioAudioOtherOther
Phillips FW-C250 2 Speaker Set w/3 CD Changer JBL Sub 6 Subwoofer NZXT Sleeved LED Strip 1m Blue NZXT Sentry 2 Fan Controller 
Other
Colonial Blue Paracord Sleeving 
CPUMotherboardGraphicsRAM
Phenom ii X4 955C2, $31, 5 broken pins, works! ... Biostar A770e3 6.3 Red&Black MSI GTX 460 768mb Twin Frozr II 2 x 2GB Kingston HyperX 1333 OC to 1348CL7@1.65v 
Hard DriveCoolingCoolingCooling
Intel X25-M G2 80GB SSD NH-D14 SE2011 6 x Case Fans (4 x YL-M, NZXT case fan, CM Hype... Jerryrigged Chipset-Northbridge 80mm HSF 
CoolingOSMonitorKeyboard
Jerryrigged VRM Heatsink (sawed off stock AM2 h... Hax'd W7 Ultimate 64bit Sanyo DP19640 19"1360x768 Ducky Cherry Browns 10keyless 
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