Lga 1155 socket. Yes it is a desktop. I just bought a r9 280 OC, do you think it is acceptable to just upgrade my cpu and go to 8gb ram down the road or should i do a new build on blackfriday in which i would need a case, ram, cpu, processor, mobo. I can get a brand new i5-3570 cpu for around $135 after using rewards from a retailer.