启动android模拟器没有反应，Failed to open the HAX device!

在eclipse启动android,半天也没有打开，后台显示如下信息

Starting emulator for AVD 'android720'

Failed to create Context 0x3005
could not get wglGetExtensionsStringARB
emulator: WARNING: Could not initialize OpenglES emulation, using software renderer.
could not get wglGetExtensionsStringARB
could not get wglGetExtensionsStringARB
could not get wglGetExtensionsStringARB
could not get wglGetExtensionsStringARB
could not get wglGetExtensionsStringARB
could not get wglGetExtensionsStringARB
could not get wglGetExtensionsStringARB
emulator: Failed to open the HAX device!
HAX is not working and emulator runs in emulation mode
Failed to allocate memory: 8
emulator: Open HAX device failed
This application has requested the Runtime to terminate it in an unusual way.

Please contact the application's support team for more 

原因是内存不够，有些创建模拟器，默认是1024M，启动时机器内存不够分配，把这个值设置小一些就可以启动模拟器了，

如设置为512M大小