From a Newegg review. Seems high profile memory might be a problem:
2 out of 5 eggsDid not fit Gigabyte 990FX
Pros: Massive size, good reviews, videos on youtube show drastic heat sapping ability.
Cons: Massive size.. 6.5" tall and is also quite wide... would not seat properly on my motherboard or processor. I ended up opting to stick with the stock AMD FX cooler until I locate a TRUE universal heatsink.
If you're getting a GIGABYTE GA-990FXA then avoid this heatsink since it will not clear the RAM sockets(let alone the cards, it blocks a single slot in its own right).
Two eggs on this one... nice construction, nice design... Bad design as well since it blocks a RAM socket, does not seat properly and does not mention on the description page it needs a specific case size(something I checked before ordering).
Other Thoughts: Really should slap a warning on this product "Might not fit all cases, motherboards..." and "requires 7.5" case width minimum."
It is a nice made heatsink no doubt... shame it didn't work with my rig. RMA'd.
YOU WILL NEED AT LEAST A 7.5" WIDE CASE TO USE THIS HEATSINK!!!
Look at the feedback section:http://www.newegg.com/Product/Product.aspx?Item=N82E16835106150