You need to check if you motherboard supports SLI and if your PSU can handle the extra card. I doubt the motherboard support SLI if you're saying it only has 1 PCIe. I'm not even sure if 750 ti's can be SLI'd either.
You need to check if you motherboard supports SLI and if your PSU can handle the extra card. I doubt the motherboard support SLI if you're saying it only has 1 PCIe. I'm not even sure if 750 ti's can be SLI'd either.