64位开了AWE没什么潜在问题，另外最大内存设置强烈要求改掉，不要用默认的，一般留2~3G内存给操作系统。你是怎么看到20多G是被awe用了的？

如果内存大的话，只留1GB给OS会有问题，可以参考下面的设置：
Physical RAM                        MaxServerMem Setting 
2GB                                           1500 
4GB                                           3200 
6GB                                           4800 
8GB                                           6400 
12GB                                         10000 
16GB                                         13500 
24GB                                         21500 
32GB                                         29000 
48GB                                         44000 
64GB                                         60000
72GB                                         68000
96GB                                         92000
128GB                                       124000