Are there any 533 MHz FSB P4's that do hyperthreading?

[midnight armadillo]

My moboard (some Asrock cheapo one, socket 478) has a max FSB of 533 MHz...and claims to support hyperthreading.

I can't find any actual P4 that does this though - all the HT ones appear to be 800 MHz FSB. Am I out of luck here?

[RoyGBiv]

1. Processor speed ...

Up front, I'm assuming Intel processors work the same as AMD processors when it comes to things like this. I'm much more familiar with AMD than Intel.

Anyway, the FSB spec for the processor is its maximum. You can step it down, which means as long as the socket is the same, you can install it in a mobo and just run it at the lower FSB speed. Of course, the performance will be lower than what the spec sheet says for the processor you get, but it would be lower for a processor that was only rated at 533MHz anyway. What I don't know is if you'd get the benefits of hyperthreading running it stepped down like that.

I've put a lot of AMD processors rated at 333MHz in mobos that can only acheive 266MHz FSB.