I have an e-machines model EL1331G mini tower. The PSU sticker reads:
Rating: 100-127/220-240 Vac, 6/3A 60/50Hz
it has an AMD Athlon 2850e processor, Nvidia Geforce 6150SE integrated chipset,
and currently only 2 GB DDR2 Ram.
I would please like to know what options I have for upgrading the performance for
online gaming such as WoW and DDO. Thank you.
The processor certainly isn't good at all but saying it can't handle anything better than 5 year old cards is a bit much. The question is whether your motherboard has an AGP or PCIe x16 slot. You need to figure that out.
An HD4650 would probably be a decent choice either way.