我的506只能超到3.8G

内存设置为266M，2.5-3-3-7。此时DRAM:FSB=1

      CPU 类型                                          Intel Pentium 4 506, 3800 MHz (20 x 190)
      主板名称                                          ASRock 775i65G  (3 PCI, 1 AGP, 1 AMR, 2 DDR DIMM, Audio, Video, LAN)
      主板芯片组                                        Intel Springdale-G i865G
      系统内存                                          1024 MB  (PC3200 DDR SDRAM)
      BIOS 类型                                         AMI (10/26/06)
      通讯端口                                          通讯端口 (COM1)
      通讯端口                                          ECP 打印机端口 (LPT1)

中央处理器 (CPU):
      CPU 类型                                          Intel Pentium 4 506
      CPU 别名                                          Prescott
      CPU 步进                                          E0
      Engineering Sample                                否
      CPUID CPU 名称                                    Intel(R) Pentium(R) 4 CPU 2.66GHz
      CPUID 修订版本                                    00000F41h

    CPU 速度:
      CPU 时钟                                          3794.3 MHz  (原始频率: 2667 MHz, overclock: 42%)
      CPU 倍频                                          20.0x
      CPU 前端总线频率(FSB)                             189.7 MHz  (原始频率: 133 MHz, overclock: 43%)
      内存总线                                          189.7 MHz
      DRAM:前端总线频率(FSB)                            1:1