|A excerpt from an Amazon reviewer:|
....Unfortunately, I think this card's absence of additional power connections may be its only flaw. When using my external SSD, my computer couldn't turn off when plugged into this expansion card. It would just restart over and over again. Unplug the SSD, my computer turned off normally.....
The reason I am angling towards drivers being the issue is buggy drivers can cause hardware and software conflicts which can cause improper shutdown (among other problems) of your PC.
If you haven't already yet, take a look at Initeck's website and see if there are updated drivers for your card.
In any event the seller has said it is compatible with Windows 7, if you are experiencing problems using it with your Windows 7 PC this could be classed as a compatibility issue and be grounds for return.
Take a look at the reviews at Amazon, other purchasers have returned their card and mentioned their alternatives.
message edited by btk1w1