[20071016]让32位系统支持4GB以上内存!
现在的系统不是很好的支持4G的内存。
一般只有换64位XP才可以。所以你那个没有好办法。
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1 操作系统内存寻址能力:
32位寻址能力为4GB
64位寻址能力为16777216TB(1TB=1024GB)
也就是说32位的操作系统只能认到4G,那为何只显示3个多G或者更少
在传统32位构架中,3-4G的寻址空间是留给以下设备:
-系统 BIOS (包含主机板, 外加扩充卡, 等..)
- 记忆体对应 I/O
- AGP/PCI-Ex/PCI的设定
- 其它PCI装置的记忆体
简单点说:这1G的内存就是被他们占用了,而且根据外接PCI-E/PCI设备的多少:如双显卡,外接声卡网卡,那很可能就只有2G多接近3G了。
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2 关于VISTA是否能识别4G或以上内存
32位的VISTA版本由于现在还不支持PAE技术(Physical Address Extension : 物理地址扩展),
所以安装时就不要想32位VISTA认出4G来。Vista 从内核上来说应该是能够支持PAE,也许,Windows Vista(32位的)会在今后以Service Pack方式引入对PAE的支持
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所以建议我们的销售人员给普通客户应配3G或少于3G的内存
. 如果你的配置超过3GB, 以下两种状况必须符合::
1 硬件支持(芯片组):Intel 7520/7525(服务器/工作站用)、Intel 975X, 955X, Nvidia NF4 SLI Intel Edition, Nvidia NF4 SLI X16
2 软件则要64位操作系统或者SEVER2003
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你可能会困惑为什么会是3.5GB这样一个数字呢,为什么不是4GB呢?恩,事实上对此问题本有个很长的技术说明。简而言之就是32位操作系统只能支持最多4GB内存。事实上,这个数据是有变化的,而我就选了个3.5GB。除了随机存储器,你还有其他的存储设备,例如显卡。这些内存的总和在32位操作系统中最多是4GB。但事实上,对32位Windows Vista的用户而言,这并不停留在4,096MB。听我慢慢道来。
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如果你正好买的是4GB的内存,那可能非常好。我之所以说是“可能”,是因为许多32位的操作系统过了4GB这个坎之后会降低效率。因此,如果你拥有少于3GB的内存,没必要再出去买更多的内存。如果你想要利用更多的内存(在8GB与128GB之间),你总是可以转到64位Windows Vista中去的。OK,废话少说,我们开始吧!
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步骤:
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1、进入cmd:点击开始菜单,在搜索框中输入”cmd“,按下 Ctrl + Shift + Enter (进入cmd的管理员模式)
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2、输入如下命令
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BCDEdit /set PAE forceenable
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这里的BCDEdit是关于命令行的启动配置编辑器。使用上面的命令,你能启用物理地址扩展(PAE),让支持的内存大于4GB。
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