oh one more thing,
even though thid motherboard (v671) has an onboard DC-DC psu. i hotwired a morex 60W ATX psu to it, and it powers the board fine, however if i connect the 1290 in line with the morex, the morex 60W receives 12V from the 1290 but wont power the board !!!
i also just read elsewhere that the 1290 is the first in the series with an onboard relay for compatibility with ALL motherboard ACPI power headers, so i shouldnt be getting problems with power up either !!