Welcome to tsf. Integrated graphics should be fine for second life. It doesn't require any kind of heavy graphics power.
But if you still want to get one anyway heres a few. None require psu upgrades.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2918660&CatId=1603
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2563226&CatId=1603
But if you still want to get one anyway heres a few. None require psu upgrades.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2918660&CatId=1603
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2563226&CatId=1603