Originally posted by FadingTheory
But those CPUs rely on redunduncy (more then one processor). No AMD CPU has hyper threading, correct?
actually any opteron in the 2xx series and 8xx series can do the same thing hyperthreading does, although they don't give it the name "hyperthreading" or anything fancy like that. only the 1xx series opterons do not have the multi-way support.
Opteron 2xx processors are 2-way (2 virtual CPU's per 1 physical CPU)
Opteron 8xx CPU's are 8-way (8 virtual CPU's per 1 physical CPU)
you can have up to 2 Opterons in one board if any of them are in the 1xx or 2xx series
that means you can have 2 physical X 2 virtual per physical CPU = 4 virtual CPU's if they are both in the 2xx series
you can also have up to 4 Opterons in one board if all are in the 8xx series
4 physical CPU's X 8 virtual per physical CPU's = 32 virtual processors!!!
that's no typo either!!
although if you actually did buy 4 Opteron 8xx CPU's, it would cost a significant amount of money. I believe the only quad 940 board out ATM is from Tyan, which costs about $1500 US (that's just the motherboard!!)
the cheapest Opteron in the 8xx series is the 840, which costs at least $770 each.
now, 770 x 4 + 1500 = $4580
and that's with the lowest end of the 8xx series opterons
if you got the highest end, the 852 it would cost $1474 for each CPU (from monarchcomputer.com, about $300 cheaper than the only other place I saw it)
$1474 x 4 + $1500 = $7396