Pretty much... I think just about all the 775 boards support HT now-a-days. The only thing to watch out for on a Prescott core is the motherboard manufacturers made the power circuitry more robust for the higher power draws of the Prescott chips. So when they say "Prescott Support" they mean the board can supply adequate power for a power hungry chip like that.
The 630 chip you are looking at has 2 meg L2 cache which also adds to the power draw...
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