There are a few different slotkets:
ppga (basicly celeron only),
fcpga (coppermine supported, regulator on motherboard must support the right voltage),
fcpga2 with tualatin support (motherboard must support low voltage for tualatin. Example upgradeware Slot-T adapter),
fcpga2 with tualatin support with voltage regulator on the slotket (for example Powerleap ip3/t).
In all cases it is best that the bios version supports the cpu.
So, if the regulator on your board can go as low as 1,5v you should be able to run the tualatin celeron with an adapter like the slot-T. If the regulator does not go that low you should look for an adapter like the powerleap.
If you have the right regulator, a coppermine supporting adapter should also work if you have a modded tualatin cpu (like from the chinese ebay seller).
I don't know the ''slot wonder''. If it supports Tualatin cpu's and has it's own regulator it should work fine. Without the regulator make sure the board can at least do 1,8v and use a good cpu cooler. 1,5-1,6v is best but it can run with 1,8v. Some boards cannot go lower than 2.0v and i don't think that's healthy for the cpu....
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