有没有芯片既是双核又是64位的啊

有呀！
好的cpu价格表

AMD ATHLON 64 ADA2800 CPU (BOX) $ 1140
AMD ATHLON 64 ADA3000 CPU (BOX) $ 1297
AMD ATHLON 64 ADA3200 CPU (BOX) $ 1645
AMD ATHLON 64 ADA3400 CPU (BOX) $ 2269
AMD ATHLON 64 ADA3500(939) CPU (BOX) $ 2740
AMD ATHLON 64 ADA3800(939) CPU (BOX) $ 5620
AMD ATHLON 64 FX-51 CPU (BOX) $ 6050
AMD ATHLON 64 FX-53(939) CPU (BOX) $ 6930
AMD ATHLON XP 2200+ CPU $ 495
AMD BARTON XP 2500+ CPU $ 650
AMD BARTON XP 2600+ CPU (BOX) $ 736
AMD BARTON XP 2800+ CPU $ 1035
AMD BARTON XP 3200+ CPU (BOX) $ 1625
AMD MP ATHLON XP 2000+ CPU $ 970
AMD MP ATHLON XP 2600+ CPU (BOX) $ 1230
AMD MP ATHLON XP 2800+ CPU (BOX) $ 1588
AMD OPTERON OS242AU CPU (BOX) $ 1980
AMD OPTERON OS244B CPU (BOX) $ 2825
AMD OPTERON OS246B CPU (BOX) $ 3920
AMD OPTERON OS248B CPU (BOX) $ 5790
AMD OPTERON OS250B CPU (BOX) $ 6735
AMD OPTERON OSA148 CPU $ 3950
AMD SEMPRON 2200+ CPU $