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Looking for recommendations for thermal pads / thermal tape

post #1 of 10
Thread Starter 
I'm switching my reference GTX 660 Ti cooler to an Accelero Mono Plus (since the card is tiny and that way I'll also be able to keep the stock large aluminum VRM heatsink). I will not be using any of the heatsinks that come with the Accelero package and instead ordered some cheap copper ramsinks from Amazon:



They have so-so thermal tape in terms of adhesive properties, and I hear 3M tape being recommended all the time, but I can't find it for a reasonable price anywhere I've looked so far. I.e. if I just need a small amount, I'd rather not pay $10 for a small square of thermal tape. Is it possible to find it on the cheap someplace? I will be sticking to tape, because I don't want to scratch / damage anything in case of an RMA.

And another question is about thermal pads. I assume the stock VRM heatsink has a thermal pad under it (the narrow aluminum fin array to the left):



To give VRMs as good cooling as possible, would it help to swap stock thermal pad to a better kind? And if so, which? (links or names would be appreciated).

Many thanks!
Edited by ElevenEleven - 4/1/13 at 4:02pm
   
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post #2 of 10
get the phobya! They have 7W/km thermal pads <3

http://www.frozencpu.com/cat/l3/g/c487/s1481/list/p1/b189/Phobya-Thermal_Pads_Tape-Thermal_Pad_-_RAM-Page1.html
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post #3 of 10
Thread Starter 
Thank you for the recommendation. Am I correct to assume that the VRM has a thermal pad between it and the VRMs and not something more permanent?

ETA: looks like these come in various thicknesses: 0.5-1.5mm. I'm afraid I'm not sure which one I need. Is there a common thickness for reference GTX 670 / 660 Ti cards? I can see that the heatspreader has adjustable height thumbscrews, but not sure how much pressure those provide really.

---
Also, are there better VRM heatsinks I could get? Enzotech makes lots of various copper mosfet heatsinks, but they are meant mostly for motherboards--not sure which one would fit.
http://www.enzotechnology.com/air_cooling.htm
Edited by ElevenEleven - 4/1/13 at 5:33pm
   
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post #4 of 10
Quote:
Originally Posted by ElevenEleven View Post

Thank you for the recommendation. Am I correct to assume that the VRM has a thermal pad between it and the VRMs and not something more permanent?

ETA: looks like these come in various thicknesses: 0.5-1.5mm. I'm afraid I'm not sure which one I need. Is there a common thickness for reference GTX 670 / 660 Ti cards? I can see that the heatspreader has adjustable height thumbscrews, but not sure how much pressure those provide really.

---
Also, are there better VRM heatsinks I could get? Enzotech makes lots of various copper mosfet heatsinks, but they are meant mostly for motherboards--not sure which one would fit.
http://www.enzotechnology.com/air_cooling.htm

VRM heatsinks always have thermal pads,
Go with 1.5MM, I believe that's what the stock one is. And besides, the more compressed the pad is, the more thermal transfer happens, so its all good

Stock 670 VRM heatsink is great! Nothing else needed! Only thing you could add is VRAM heatsinks. I glued mine to my VRM, actually used thermal paste and epoxy...its permanent
post #5 of 10
Thread Starter 
Thank you -- that was my line of thought as well. Do you think the stock thermal pad is good or would I get significantly better VRM cooling with a Phobya pad? I'm all pro greater stability for overclocks--just not sure how much of a difference switching thermal pads will do here.

I wish I could monitor VRM temperatures in GPU-z as easily as it can be done for my 7970 =/ My nVidia cards' VRM temperature is somewhat of a mystery to me.
   
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post #6 of 10
You could always stick a temp probe on it/them. At some point in the near future I'm going to test better pads on my Komodo waterblock. I've been talking with swiftech and they just got back to me that their supplier for their thermal pad's rating is 2W/km, Those phobya's are 7W/km so I'm curious to see what difference they really will make. Memory on my 7950 is at 1800 so...every couple C's dropped maters now biggrin.gif
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post #7 of 10
Thread Starter 
I'm surprised this isn't already a well-known thing--barely any replies here frown.gif Especially when you can read VRM temperatures on AMD cards, so swapping pads and comparing should be easy.
   
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post #8 of 10
They do have extreme pads, 11w/mk, better than quite a few thermal pastes http://www.frozencpu.com/products/16878/thr-164/Fujipoly_Extreme_System_Builder_Thermal_Pad_-_14_Sheet_-_150_x_100_x_05_-_Thermal_Conductivity_110_WmK.html?tl=g8c487s1730
I did get some to try but haven't replaced the pads on any cards yet.

0.5mm is the most common one used, followed by 1mm. Thermal pad with the vrm sink you currently have on the card would be better new heatsinks with thermal tape.
    
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post #9 of 10
Thread Starter 
Thank you. Yeah, I'm keeping the stock VRM heatsink. The small copper ramsinks will be for the exposed memory chips--just in case... and they were cheap.

Ok, so but... confused about the thickness now. You say 0.5mm is the most common, and Cakewalk_S thinks the stock pad under that large aluminum heatsink is 1.5mm. Is it a safe bet to go with 1.5mm or should I try 1.0mm "in the middle"?
(Also, do you know how much of an effect pads of different thermal conductivity have on VRM cooling--like switching from stock to a Phobya 7W/mK or even the Fujipoly pads?)
   
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post #10 of 10
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Originally Posted by ElevenEleven View Post

Thank you. Yeah, I'm keeping the stock VRM heatsink. The small copper ramsinks will be for the exposed memory chips--just in case... and they were cheap.

Ok, so but... confused about the thickness now. You say 0.5mm is the most common, and Cakewalk_S thinks the stock pad under that large aluminum heatsink is 1.5mm. Is it a safe bet to go with 1.5mm or should I try 1.0mm "in the middle"?
(Also, do you know how much of an effect pads of different thermal conductivity have on VRM cooling--like switching from stock to a Phobya 7W/mK or even the Fujipoly pads?)

1mm should work fine, the way the VRM sink is a single unit on your card a thicker pad should still work as well, so shouldn't hurt to go thicker, & it may even help, I've never tried thicker pads.
It isn't like the heatplates a lot of gpus have where too thick in one area might make bad contact in the area next to it.

It probably won't make much difference in temps, like TIM where they are almost all withing a couple degrees of each other. Never hurts to use the best but it may not be much if any improvement.
    
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CPUMotherboardGraphicsRAM
i7 990x/3930k/3770k/4770k GB x58a-OC/Asus RIVE/x79 gd65/z77 mpower/z77 MV... gtx480s/gtx580s/7970s/680s/Titan Hyper/PSC/BBSE/Hynix/Samsung 
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Overclock.net › Forums › Graphics Cards › NVIDIA › NVIDIA Cooling › Looking for recommendations for thermal pads / thermal tape