How did you "notice a short"? If you have a short, your system would either burn out or have serious issues working.
If you get a board with the same RAID controller, or possibly one that's the same brand/product line, there's a good chance that the array will be detected by the new chipset and not have to be modified. If the new board has a different controller, then you will without fail need to wipe it out and build a new array with the new board, then restore your data (of course if you get a different board, you'll want to at least do a repair install of Windows anyway).
Even if somebody told you it was guaranteed that it would work, you still shouldn't change out something like that without a backup. That's just asking for it to fail and leave you with no computer and all your files lost.
Get a cheap hard drive and an external enclosure (or a cheap prebuilt external hard drive) and make a backup. Or back up to CDRW. If you actually have nearly 160GB of data that'd only take 125 or more CD's with high compression. 🙂