From swiftech's site:

The MCW60 in stock configuration is fully compatible with ATIŽ's new 3800 Series graphics cards (shown above with Sapphire Radeon HD 3850).

The MCW60 is shown above with ATIŽ's 2900XT. The optional A2900 adapter kit is required for installation with this card.
I guess the layout for the 2900 series were much diff than the 3800 series.

Thanks for all your input Saved myself $6 + s/h