Good luck,
AGP = Old Tech
1333MHz FSB = High FSB to begin with
mATX = not the best OC'ing features (generally)
When you consider that most mATX max out at 1333 FSB, that AGP is not used in new boards, and OC'ing mATX boards are slim to none to find with your needs, you might want to reconsider using AGP. You will have an easier time finding mATX boards with PCI-E and some OC'ing features.
Get your post could higher than 100+, without spamming, and you can either sell/trade your AGP card with something better. Because as of right now, you are asking to be disappointed.
Again good luck,
bryan d