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Heads up for everyone that is using a Universal Water Block on their HD7970/7950

post #1 of 3
Thread Starter 
After installing my MCW82 on my HD7970 I saw the temps jump up to 84c under benching load and nearly freaked. I knew immediately it wasn't making good contact. I emailed Swiftech and Gabe responded with this:

"The silicon of the 7970 & 7950 is .2mm below the frame. So your 82 is sitting on the frame, not on the GPU.

Some manufacturers use a shim to compensate. Such solution adds a performance robbing TIM joint as you might realize.

I have designed:

• a new base plate for the 82 which is specific to 7970 & 7950.
• a hold-down plate which is specific to the 54mm hole to hole distance (standard is 53.2)
• a cross-bracket identical to the stock solution (with AMD’s blessings)

All these parts should arrive within 2 to 3 weeks.


Meanwhile, using thick thermal pad as a gap filler. But if your temps don't drop at least into the 60's then re-install the stock cooling.

[Edit] I see that Stephen ok'd a shim.. I think you might want to save your dough for now, and use thermal pad if you have some. Give it a try.. The spacing between frame and silicon as I said is very tiny (0.2mm) so a pad will fit. Less than ideal thermal conductivity granted, but a cheap bandaid for now."

So until the proper solution gets here I am going to try the thermal pad as a spacer and if I can find a piece of copper that thin and see which works the best. My gut says it will be about the same, but I am curious to see.

Anyway, Swiftech is the only company I know of addressing this, so if you have an EK, Danger Den, XSPC, Koolance or even an older D-Tech block, you may want to take a look at using something to make up the lack of contact or email the respective companies to see what their solution is.
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New Custom Case
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8350 Asus 990fx Sabertooth Diamond hd7970 Diamond HD7970 
RAMHard DriveHard DriveHard Drive
Gskill Ripjaws OCZ Agility 3  2Tb Seagate Sata3 3Tb Western Digital Green Drive 
Optical DriveCoolingCoolingCooling
LG Bluray Burner Swiftech HD Koolance MVR-100 Koolance CHC-125 
CoolingCoolingCoolingOS
Swiftech MC35x2 with dual top Feser Triple 120 Radiator Corsair SP120 Quiet x 3 Windows 7 Ultimate x64 
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post #2 of 3
Thread Starter 
Ok, so I played around with using a thermal pad and an aluminum shim and both failed big time causing the GPU to shut down. For now I would suggest folks stick to the stock cooler until the proper solution is released.
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RAMHard DriveHard DriveHard Drive
Gskill Ripjaws OCZ Agility 3  2Tb Seagate Sata3 3Tb Western Digital Green Drive 
Optical DriveCoolingCoolingCooling
LG Bluray Burner Swiftech HD Koolance MVR-100 Koolance CHC-125 
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Gaming Rig
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New Custom Case
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CPUMotherboardGraphicsGraphics
8350 Asus 990fx Sabertooth Diamond hd7970 Diamond HD7970 
RAMHard DriveHard DriveHard Drive
Gskill Ripjaws OCZ Agility 3  2Tb Seagate Sata3 3Tb Western Digital Green Drive 
Optical DriveCoolingCoolingCooling
LG Bluray Burner Swiftech HD Koolance MVR-100 Koolance CHC-125 
CoolingCoolingCoolingOS
Swiftech MC35x2 with dual top Feser Triple 120 Radiator Corsair SP120 Quiet x 3 Windows 7 Ultimate x64 
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Corsair AX750 CaseLabs M8 
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post #3 of 3
Thanks for posting this. I am considering a Unviersal waterblock for my GTX670 and it will something I know to check before installing.
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