What is meant dy a dual mobo? Well my jija's given me a job for upgrading his celeron system. Its quite old . Purchaesed sometime in 1995-96. The config is... Celeron 333(socket 470 i think or is it slot??) The mobo is an orignal sis.Small babyAT formfactor board n cabinet. Its got onboard graphics i think but he has a trident 4mb agp card installed. The sound card is some 16 bit yamaha pci card. The ram is 64 mb(32+32) pc66 or pc100 sdram. The mobo supports hdds not more than 20gb. But he doesnt want to do away with the cpu. Is there any 440BX mobo available. I found one 440ZX n 440BX dual mobo. What is dual mobo.? Does it support 2 cpus to be installed on one system. Any suggestions for an upgrade. I know buying a new system would be more better than upgradeing. But he wants to retain the same system but wants better performance. Can this system support PC100 or PC133 SDRAM. Can i install this cpu n ram on an I810 mobo.? Also anyone willing to buy the cpu,ram n mobo.