Hello, I have an Inspiron 530. Over time I've upgraded the power supply to a Corsair ATX 450, installed a HIS Radeon 6850, and upgraded to Win7. I'm a little worried about possible heat problems and cards in the future that won't fit in the case. The 6850 is a tight squeeze in the my case so I want to get a Three Hundred. I also want to get a new motherboard so I can overclock my Q6600 but I don't want to get one yet. The problem is, I'm not sure if I can change the dell motherboard or even move the dell motherboard to a new case since dell is pretty restrictive on changing their system. I want to get a new case first because I'm kind of low on money, and change the motherboard later. Will the dell motherboard work with a new case?