Just like to share my experience with my R9 290. Having bought one second hand (3 months oldI got hold of a MSI 290 one with the stock reference cooler, which was pretty loud and useless at cooling compared to the DCUII cooler on my 7970. It overclocked okay, with a core clock of 1050 and 1450 on the memory (hynix). However one thing that drove me up the wall was the coil wine!
first time I've ever had to deal with it, as all my previous cards since the radeon x1300 pro days never had such a thing.
Luckily the seller was a friend and helped me RMA and for a small fee I upgraded to the DCUII version of the card, having had a ASUS card since my GTX 480s and never had any issues with them. This card clocks much better as well with a core clock of 1100 and memory clock of 1475 (even though it has the supposedly inferior elpida chips) all stock volts. With a bit of voltage tweaking hoping to hit 1200 but even at 1100 all my games never go below 60 fps on max settings. I actually appreciate how these cards need some seriously good airflow in the case to keep them cool even with aftermarket coolers, had to install a fan on the case floor to blow directly on the card to keep it from going back to the usual 90-95C that the reference cooler was doing. Now in the 70-80 range when OC'ed and no throttling
As much as the Asus DCUII cards get a lot crap for falling behind other vendors when it comes to getting a 'golden chip' or needing it's on custom waterblock, they do make solid, silent:D, good looking cards.
Hopefully this will help anyone who is thinking of getting an Asus 290.
Sorry if this post may seem pointless to anyone.