Would two of these work on a 4870 X2 to air cool?

It might be possible with them set on alternate sides of the card, but the core closest to the case might not have enough distance from the back of your case to allow the HR03 to fit without colliding with the case. I think the holes around the cores on the X2 are the same as the 4870, so as long as their is space it might be possible. Would be a very heavy solution and take up 3 slots (or even 5 if use fans) tho.
 
Fair point on the distance from the back of the case, I'll try and find the measurements. Not too fussed about it taking up a few slots tho as I only have one gfx card. Tis a bit of a gamble to just order them and see if they fit but it might be the only way :(
 
From the their site's FAQ

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Will there be a solution for the ATI 4870x2 from the HR-03 series, or are there any other VGA coolers that can work on the new graphic card?

Answer :


The ATI 4870 consists of two GPU sockets and the mounting holes are different from any other graphic cards. Currently we do not have a solution for ATI’s 4870x2 but with some modification, you can have the Thermalright solution.
First you will need to purchase one HR-03 Rev. A and one V2 VGA cooler. Install V2 on the first GPU and then HR-03 Rev. A on the other in Type 1 method. For the HSI chipset, the HSI heatsink from the HR-03 Rev. A would suffice. Please refer to the picture for the HR-03 Rev. A/V2 installation.

Credit to Harley, a true overclocker at Chiphell-http://bbs.chiphell.com/
http://bbs.chiphell.com/viewthread.php?tid=30957&highlight=4870+x2

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