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Home made 7970 water block

post #1 of 22
Thread Starter 
So I got a reference 7970 that i love to bits performance wise but the noise is driving me up the wall!! I decided water cooling the thing would help plus the generally lower temps is another bonus which might improve my overclocking headroom. Waterblocks are super scarce in South Africa where I live and importing makes the already expensive blocks even more expensive. So I decided to put my thermodynamics knowledge to the test and design my own water block. I have a friend at varsity in engineering that has access to a 5 axis mill so he can cut the final design for me. My problem is that I need the card in my pc to design the block so I don not want to continuallu remove and replace the cooler until the design is finished. I need a few measurements on the card and was hoping if anyone could help either if they are willing to remove their cooler or if they are in the process of replacing a cooler or if someone has a waterblock at hand. Firstly I need to know the relative heights of the GPU, RAM and VRM's since I need my block to touch all of these.

333

The image above should explain what I mean: I need the block tou touch all the marked components and it's easy enough to calibrate the image to get the x and y sizes of all the components but I need heights. Can someone please measure (ideally with reference to PCB height) the height of the RAM chips, the GPU and the VRM's? Also of importance will be the height of the components that are higher than the highest of the afore mentioned three, specifically the capacitors next to the VRM's. Please please please, this information is very important. Any help will be great.
post #2 of 22
Thread Starter 
Honestly is there no one that can help me with this?
post #3 of 22
Thread Starter 
308

So maybe I wasn't clear enough... I mean, surely there must be someone out there with a 7970 waterblock or even just someone replacing an air cooler on a 7970...?? In the image above I need to know the heights of the different colour coded components with respect to some reference, perhaps the height of the GPU contact in green. are the RAM chips and VRM's (red) the same height? Are they the same height as the GPU maybe? Also how deep do the cavities marked in blue in order to clear the caps and other components? Also what is the height of the thick part of the standoffs marked in yellow? With this information I can model the borrom of my block, the top is a completely custom design putting to work my understanding of heat flow through different media. Please people, for the sake of science!!!!
post #4 of 22
Just take all the measurements you need from your card at one time instead of hoping someone will do it for you... I doubt anyones gonna take the time to do it themselves.
Megatron
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Megatron
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post #5 of 22
Thread Starter 
I was hoping someone was gonna take apart their card anyway and could do it then. I guess i will have to do it myself. Do you know if there are any thermal pads under the stock sink? I will have to put it back together again to finish the design so I don't want to remove the sink if I won't be able to put it back on afterwards
post #6 of 22
Thermal pads can be reused. They are not very sticky.
Megatron
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post #7 of 22
Quote:
Originally Posted by HungryDuck View Post

I was hoping someone was gonna take apart their card anyway and could do it then. I guess i will have to do it myself. Do you know if there are any thermal pads under the stock sink? I will have to put it back together again to finish the design so I don't want to remove the sink if I won't be able to put it back on afterwards

Quote:
Originally Posted by skatpex99 View Post

Thermal pads can be reused. They are not very sticky.

^ This. However, you should exercise caution and patience when dealing with thermal pads. They generally break/tear very easily. They're not made to be handled roughly. So be careful when removing the stock cooler and you should be fine.
post #8 of 22
Thread Starter 
Quote:
Originally Posted by ArkAngel666 View Post

^ This. However, you should exercise caution and patience when dealing with thermal pads. They generally break/tear very easily. They're not made to be handled roughly. So be careful when removing the stock cooler and you should be fine.

Thanks for that thumb.gif
So I was doing a bit of research on water block and general HSF cooling on the 7970 and it looks like just about everything uses thermal pads on the RAM and VRM's. Has anyone found a cooler that makes direct contact with these components? I had the idea of machining my block to make close contact to all components and only require some TIM, is there a reason everyone is using pads apart from allowing higher machining tolerances?

Also does anyone have experience with cool laboratory liquid pro TIM? I ordered some for my CPU but it arrived late so I used AS5 instead that I had on hand, the liquid pro doesn't agree with aluminium but is it any good on GPU's? Especially the naked silicon type like AMD cards.
post #9 of 22
Quote:
Originally Posted by HungryDuck View Post

Thanks for that thumb.gif
So I was doing a bit of research on water block and general HSF cooling on the 7970 and it looks like just about everything uses thermal pads on the RAM and VRM's. Has anyone found a cooler that makes direct contact with these components? I had the idea of machining my block to make close contact to all components and only require some TIM, is there a reason everyone is using pads apart from allowing higher machining tolerances?
Also does anyone have experience with cool laboratory liquid pro TIM? I ordered some for my CPU but it arrived late so I used AS5 instead that I had on hand, the liquid pro doesn't agree with aluminium but is it any good on GPU's? Especially the naked silicon type like AMD cards.

I don't know if I've ever seen any block on any card that makes direct contact to any parts on them. As a quick guess I'd assume that there must be a medium for heat transfer to take place otherwise chips and such would burn out under stress I would believe. That's just an uneducated guess though so don't take my word for it, but I don't think I'm far off the track.
post #10 of 22
Good Luck.
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Blue
(23 items)
 
Dirty 6
(11 items)
 
 
CPUMotherboardGraphicsRAM
3770k @ 5.0ghz HT  MSI z77 gd 65  Asus DirectCU 7970 @ 1300/1775 16gb Gskill 2400 @ 10-12-11-30  
Hard DriveOptical DriveOptical DriveCooling
2xCorsair Gt 120gb Raid 0 2tb HDD (2x1tb [ Raid 0 ]64mb cache) 500gb HDD Custom Watercooling Loop 
CoolingCoolingCoolingCooling
XSPC 750 XSPC Raystorm 240mm Radiator Stealth 120mm Radiator 
CoolingCoolingCoolingCooling
140mm Radiator HyperX Dual Ram Fan Cooler 7 x Artic F12 Case Fans Custom Sleeved in White... Xigamatek 4-in-3 HDD 5.25 to 3.5 bay. 
OSMonitorKeyboardPower
Win 7 64bit 3 x 21.5in Led 1080p Eyefinity Corsair K90  750 Evo Blue 
CaseMouse
Haf 932 Ikari Laser & Rat 7 & Deathadder & Laichesis 
CPUMotherboardGraphicsRAM
Amd 1100t x6@3.8ghz Stock voltage MSI 890GXM-gd65 Crossfire 6870's @ 1000/1125 16gb Gskill DDR3 1600@ 8-8-8-24 
Hard DriveOptical DriveCoolingCooling
750gb Western Digital None Sycthe Big Shuriken 2 Modded Titan TTC-HDC4 HDD 
OSPowerCase
Window 7 64bit  750w Evo Blue Modular PSU White Silverstone Sugo sg02 
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