Have you still got that 200Gb drive. It may be, that you could only create a primary partition of 157Gb, and a second partition could be made, and the space regained.

Also what operating system are you using, I have read a few articles, where that is the limitting factor.

I've never heard of a motherboard being a limitting factor in Hard Drives, only RAM. Anyone else know different?

I've never known RAM to be a limiting factor with how much harddrive space can be addressed. In a broad sense, motherboards can be a limiting factor. In reality, it is the BIOS that limits the space a board can address.

If your motherboard has a BIOS that limits the size that can be addressed on a partition, it is possible that the manufacturer created an updated BIOS that you can flash to in order to add large partition support.

I agree with MartyMcFly. Check your Disk Manager to see if you can format the remaining portion of the harddrive to an additional partition.

Sry, I meant incompatability of Ram modules with Motherboards as my example.

and...... Welcome to Daniweb Bayoubabe12345.