A friend is considering getting a Geforce 10 series GPU - likely a 1050 Ti or 1060 - but is stuck with 32 bit Windows 7. His E8400-based PC has 4 GB mainboard RAM and with his current 1 GB N9600GT installed has 3.5 GB left. How much mainboard RAM would be available to him after installing a 4 GB GTX 1050 Ti? How about a 6 GB GTX 1060? Moving to 64 bit Windows is NOT an option.