GT 740 is a lackluster card. two major generations back ( there was no 8xx series for desktop cards)
I suggest a GTX 1060, or possibly a GTX 1050 ti
The 1060 comes in 3GB and 6GB versions.
www.bhphotovideo DOT com/c/product/1275083-REG/msi_geforce_gtx_1060_gaming.html
www.bhphotovideo DOT com/c/product/1292076-REG/msi_gtx_1050_ti_gaming_x_4g_geforce_gtx_1050_ti.html
Both will work with the OEM power supply in the 8500.