64 bit & HT Technology

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Hi all,
I have a few questions regarding cpu's.
In the Mike Meyers book he talks about the Intel Itanium and the AMD Opteron. With regard to the Itanium does it have HT Technology like the Opteron does or did that come later on with the Pentium 4's. Also why this unique OLGA ( Organic Land Grid Array ) and what does it mean? With regard to the Opteron, being that it's backward compatible with 32bit, does this mean you dont have to use a 64bit o/s to run it?
My last question is in the tech spec of the Opteron it lists it as having a external speed range of 6.4 ghz because of the HT.
It has a multiplier of 14-20. How is this calculated to give a internal speed range of 1.4 - 1.8 ghz? Or does it still have a 133mhz bus speed?
Look forward to your replies.

 

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um, perhaps im missing something
but when did the Opteron get HT? HT is an intel technology in its P4s

Itaniums dont have HT
but Pentium4 Ds do (64 bit, Dual Core and HT, so one purchased processor, is two physical cores, which are two logicial processors each, thus one of them would show up as 4 processors, or some such lark)

Opterons are 64bit, but not HT
new Opterons are Dual core tho, and 64 bit


AFAIK

its possible were mixing Accronyms up, being HT both means Hyperthreading and Hyper transport (AMDs northbridge bus terminology) my post assumed you were talking about Hyperthreading, ignore it otherwise

 

Hi Phoenix,
He talks about the Opteron having Hypertransport. Sorry i should have made myself clearer. Describing it as having a built in northbridge with a direct link to other devices enabling it to transfer data at up to 6 ghz per sec.

 

http://en.wikipedia.org/wiki/Hypertransport

check out this link in regards to Hypertransport

 

Thanks phoenix but that link seems to be out of date. It came up with Object Not Found but i will go to wikepedia and look directly. Thanks