EllieYo :
aka the Sapphire Vapor X coolers that they used on the 7950, 7970, 7970GHZ.?
i heard the 290's stock heatsink doesnt cool very well and i'm a huge fan of how the heatsink on the Sapphire HD 7900's look.
Sapphire make a version on the 290 with the vapor X cooler, Not looked up specs but I'd guess they are similar
http://www.amazon.co.uk/Sapphire-290-Vapor-X-Graphic-Card/dp/B00I940L6C/ref=sr_1_3?ie=UTF8&qid=1421010739&sr=8-3&keywords=vapor+x