Celeron D330
http://ark.intel.com/products/27112/Intel-Celeron-D-Processor-330-(256K-Cache-2_66-GHz-533-MHz-FSB)
Celeron D351
http://ark.intel.com/products/27128/Intel-Celeron-D-Processor-351-(256K-Cache-3_20-GHz-533-MHz-FSB)
What socket of the D351 you have ....? if it is Socket 478 looks OK... but better check with your motherboard ...
Which board you got?