I have a HAF 932 and was considering upgrading to two 7990's to replace my 6990's does anyone who has 7990 crossfire have experience of temps especially the top card as THG reported one of the GPU's overheating pretty quick in crossfire? I have EX58 UD5 will be upgrading CPU very soon but for he moment the two cards would be right next to each other meaning not much breathing room between them if using the top 2 PCie slots.