The only mother boards that I remember causing prolem were asus P3B* series, I think prior revision 1.3... but I'm not sure.
There was also a Sony Vaio notebook...
Usually what also causes crashes is bad memory or old videocard drivers.
For some reson I can't access the Adobeforum's FAQ entry pertaining to crashes with Photoshop. In the meantime, look at this knowledgebase article:
http://www.adobe.com/support/techdocs/2bca6.htm