Will pci express x16 graphics cards work with my emachines el1352g-01w

Yes, your machine has a pcie *16 slot available.
http://i.walmart.com/i/rb/0088448353767.pdf
Just make sure any card you want to get can fit in that small computer.

Be advised, it looks like the slot is a pcie *16-1 and not a 2.0. Newer pcie 2.0 cards will not work at full power.

Also, keep in mind the PSU gives only 220W, and I don't think that will power anything worth buying.

Thanks and if i decided to upgrade the psu, what would be a good psu unit for my emachines el 1352g-01w any recomendations