Windows 7 OS deployment Time

Dear All,

I'm trying to deploy Windows 7 on new H/W which have XP SP3 installed. i've captured the image with Standard Application from a reference computer. But the problem is its taking more than 5 hours to complete the deployment evenif local SCCM site server with DP and PXE point available. The image is around 4 GB.

Have anyone faced the same issue. i'm not able to understand why this is happening.