Original quote "For example, the mother board says supports Socket 478, and hyper thread ready. Can I put on a processor that is Socket 478 without hyper thread technology??"
Previous replies to that original question are acknowledged.
I'm assuming that everyone knows that the ONLY P4B that Intel shows as H/T-capable processor is the 3.06GHZ*? Hmmm .... anyway, I digress.
I'd love to be proven wrong on this, hype aside, but according to The Gods** socket 478 compatibility alone is not a valid measure. According to my (amateur) research;-
a) a m/b with an 875P(/E?) chipset won't support a P4B below 533 FSB and that means the P4B 2.4 is the slowest processor you can use with an 875P m/b*.
b) a m/b with an 865P chipset won't support a P4C because the P4C FSB is too fast for the chipset
c) a m/b with an 865PE or an 865G chipset will support all suffixed P4's (A/B/C) but will not support any of the original, "standard", non-suffixed socket 478 P4 i.e., the "Willamette"-core P4.
d) I've no idea about Celeron processors, but my guess is "not a chance"
e) I haven't researched all the non-Intel chipset compatibility rules, sorry!
Like I said, I'd love someone to prove that a P4 1.4 Willamette processor works on an 875P m/b or that a P4 2.4B overclocked to 3.06+ will hyperthread ... honest.
A final word of caution - I recently read that certain m/b's "run like a dog" with a unless they have a 3+ghz processor. Do I smell shinola or ?
* why? Can't a mildly overclocked 2.8 P4B support H/T??? I read a 2.4B was overclocked, reliably, far beyond 3.06B
** various Intel references and various issues of the UK's press e.g., Micro Mart (neither of which are 100% accurate - e.g., the original, alledged statement that the "875PE doesnt physically contain PAT" & "HT begins at 800mhz FSB" respectively. Both statements being innacurate according to each other's published documentation.)