need help to Finish my first Rig of 8 GPU titan x? (perhaps somthing is missing?)

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totaly right, i mean if i am ready to go for titan x so surely for the TI.

i asked tyan support to tell me how much space will be between the cards and from what i understand from tyan tech support is not alot, a fraction of a inch between each card.

is that ok? i mean is that enough? i want to keep the system cooled enough, between they also provide an air dust for the gpu is that any good?