The H61 chipset MB has the pcie3.0X16 so you can use the gtx750ti with your MB, but you also make sure your PSU can or can not power the new GPU, which is very common mistake for upgrading the new GPU without check the PSU can or can not power the new GPU. Because the new one, gtx750ti, need 350-400W PSU with 20A on the 12V rail, and the GT610 requirement less Amp and wattage. If the PSU can't handle the new GPU, and your PC will have black screen or does not boot.