exactly its an old p4t 423 model
i sold this board nib to my brother who started looking into it, he said a plate was missing & sent me some links showing a back panel the board went to.
i didnt know if it was needed or not? would the board bolt in a std aftermarket case & be fine w/o it? Asus shows nothing on their website about it? the board is/was new so i thought it wasnt actually put into production & sold with that panel?