well its kind of a stupid problem really and maybe in the wrong section of this thread but here goes. The mobo i have has these slots in this order. Master PCIe X16 PCIe PCIe Slave PCI X16 PCI PCI now the crap i have to put in them is 2 x Radeon 1GB 2900XTs Razer sound Card Asus Physix accelerator (an i need a way of connecting this computer with another one) anyway the problem is these GPUs take up two brackets so they partialy cover the ports lower of them making it impossible to fit my other cards unless i remove the Fan/heatsink and go fo a watercooling block however this is expensive and the only other option i could find (External PCI box) is £600 upwards for just 2 slots which is rediculous. firstly if anybody could help me with a solution to the space problem it would be great and secondly this is the first time i have tried to set up two pc's on lan an run them off the same net connection so what will i need? They are both XP. will i need a seperate ethernet card or do some mobos have imbedded lan support? any help would be extreamly appreciated.