More people are getting into SFF and mATX builds now that more mATX mobos are able to overclock. We know the G33 and G35 chipset can overclock but often the manufacturers put limits on their mATX mobos to severely limit overclocking. Unsuspecting buyers buy one thinking it will overclock and find out to their disgust it wont. So I made a list of the ones that are confirmed overclockers to help people. Here are the ones that I know of that overclock decently to very good (as far as mATX goes).
ABIT F-!90 HD (Has a higher than normal death rate - Not Reccommended)
ASUS P5K-VM
ASUS P5E-VM HDMI (This new G35 is currently only availble in Europe but soon to relase elsewhere)
GA G33M DS2R (No 1:1 divider for 800MHz FSB CPU)
GA G33M-S2
MSI G33M-FI
All these mobos have different features and they all have some quirk about them. Be sure to research them thoroughly before buying. Also remember when it comes to overclocking your results may vary from other's results. Each of these mobos will do at least 333FSB and some will go 500FSB with a low multi (example: 6) chip or setting. Also take note that new BIOS often come out that alters or enhances performance of these mobs so the info above is subject to change.
ABIT F-!90 HD (Has a higher than normal death rate - Not Reccommended)
ASUS P5K-VM
ASUS P5E-VM HDMI (This new G35 is currently only availble in Europe but soon to relase elsewhere)
GA G33M DS2R (No 1:1 divider for 800MHz FSB CPU)
GA G33M-S2
MSI G33M-FI
All these mobos have different features and they all have some quirk about them. Be sure to research them thoroughly before buying. Also remember when it comes to overclocking your results may vary from other's results. Each of these mobos will do at least 333FSB and some will go 500FSB with a low multi (example: 6) chip or setting. Also take note that new BIOS often come out that alters or enhances performance of these mobs so the info above is subject to change.