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Mounting thermal pads on full cover waterblock

post #1 of 8
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So I purchased ek fc waterblocks, and they come with thermal pads. I'm wondering whether I should put non-conductive thermal paste (1) between the RAM and the thermal pads, (2) between the thermal pads and the block, or both (1) and (2). Will thermal paste help temps or is it more of just a fail-safe thing?
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first build
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post #2 of 8
No just put the termal pad on the RAM that's all you need to do with that.
The thermal paste is just for the chip(s).
Ares
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Ares
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post #3 of 8
I put a very small amount of paste on the VRM's then the thermal pads on top. That is what I understood EK to recommend in the mount instructions for the FC7970
Kusanagi
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Kusanagi
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post #4 of 8
Quote:
Originally Posted by wtRiViaL View Post

So I purchased ek fc waterblocks, and they come with thermal pads. I'm wondering whether I should put non-conductive thermal paste (1) between the RAM and the thermal pads, (2) between the thermal pads and the block, or both (1) and (2). Will thermal paste help temps or is it more of just a fail-safe thing?


Don't use thermal paste at all? Thermal pads are an alternative to thermal paste, and are meant to replace them. The problem is they usually don't work quite as well as thermal paste, and the pads that DO work that well cost a LOT of money. Assuming you're not using IBM's M.R.A.M. then the heatload isn't worth worrying to much about, so any thermal pads will work just fine. Modern RAM cooling is more of a novelty for looks, unless you're using some really fast 2400MHz DSRAM. Then you MIGHT consider getting some aftermarket cooling, as those put out a notable amount of heat.



I would avoid thermal paste in your scenario, it seems redundant. Thermal pads and paste both have a LOT lower thermal conductivity than the copper heatsink, so you want as little of them as possible.
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post #5 of 8
Adding thermal paste to the pads just adds another medium for heat to have to go through, which I believe would increase temps (not very significantly).
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post #6 of 8
You do not need to put any thermal paste on. Thermal pads work by squeezing them to the point where paste inside of them oozes out a little. If they are properly sized pads (which they will be), they'll be squeezed by the mounting screws on your block.
post #7 of 8
Probably not needed on the Vram chips, but EK recommends thermal paste along with the thermal pads on the VRMS:
Quote:
1. PLACING THERMAL PADS ON PCB. Place thermal pads on chips so that numbers on chips match size of thermal pads. EKWB made sure users have more than enough pads to cover all surfaces that need to be covered to make block fully functional). EKWB recommends using small drops of electrically non-conductive (for example: Arctic Cooling MX-2™, MX-4™ or GELID GC-Extreme™) thermal grease on each phase regulator (that is being covered with thermal pad) in order to even further improve the thermal performance of the EK-FC Titan series water block. Repeat the procedure on the back side of the PCB after step 2 in this section.

http://www.ekwb.com/shop/EK-IM/EK-IM-3831109857144.pdf
    
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post #8 of 8
The thermal paste helps to keep the pads stuck to the card. This gets messy though and is a pain when you have to remove the block. I just breathe on the pad and it sticks that way. This works well with the non-sticky pads like the white phobya pads. You don't need to do anything with the sticky pads.
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