It's the same. The FSB is the same in both cases but the potential to overclock the 6400 farther is greater, although there are always exceptions. Both chips will be limited to the max stable FSB the mobo has/can offer, but since the 6400 has a higher multiplier than the 6400 will reach a higher clock per fsb incremental increase. Just curious, why is this information useful?
It depends of the motherboard, some motherboard can take it really easy(400mhz) and some other its the extreme. With intel platform, the main stress is on the northbridge...
The e6300 and e6400 are both extremly OCable chips, with proper cooling, you wont hurt them!
CPU: no over volting/cool temps = really happy =)
Well my understanding was that OCing reduces the life expetancy of the components. If that was related to the bus speed, then you could justify getting a higher end CPU (i.e. more multis) to put less strain on the mobo or get a more robust mobo.
Also I am trying to figure out whether the Gigabyte S3 will last long enough under an OC environment, or whether I should get the DS3? Just trying to keep the cost down as it seems that for every component there is a good reason to get the next better model - eg. PSU , RAM, case, etc.