I had. . . AMD Sempron 2400+ 1.7GHz (socket A???) AMD Athlon II 170U 2GHz (AM3) Intel Pentium 4 HT 630 3GHz(LGA 775) still have that 2x AMD Athlon II x2 250 3GHz (AM3) I fried one oth these so i had to buy another one AMD Phenom II x6 1055T 2.8GHz-3.30 (AM3) now i have . . . Intel Core I7 2600K OCed to 4.7 GHz (LGA1155) And 2x Intel Celeron (LGA 1150) machines for BTC mining. . .