Not with SLi - no.
Both video cards had dual digital outputs. So four outputs alltogether.
Motherboard said it supported SLi, but any attempt to put a video card into the second slot resulted in a total loss of graphics.
Many oiks, geeks, guru's and tech support of the mobo company (ASUS) declared it as a motherboard "fault" and insisted it should be replced.
Identical symptoms on FOUR successive motherboards before I got tired of pratting about. Was only doing the SLi "because I could" (or, as it happened, couldn't)
When I went into deeper conversation with the incorrectly titled "support technician" at ASUS he eventually pointed out that the SLi would only allow one monitor to operate, despite four outputs across the two cards. If I wanted a second monitor (which I most certainly did), I would have to fit a third video card.
Machine runs an absolute treat with one video card, I'll leave it there.
Funnily enough, my back up power supply also went *BANG*, in a very spectacular and colourful way, one evening just before Christmas. It was, however, coincidental with me dropping a camera tripod on it.
Note to self: Buy new UPS.