Randall R Schulz wrote:
On Wednesday 31 May 2006 07:16, Per Jessen wrote:
Hyperhreading is different - only one processor that pretends to do more things at the same time :-)
The difference is more a matter of degree. In an HT CPU there is less duplicated internal machinery. A dual-core CPU has two full CPUs that operate largely independently. In the current dual-core chips, I believe, there is a single, shared level-2 cache.
I've been thinking of getting a dual-core Pentium D for a new workstation, and the specs I've seen all say 2 x 1Mb L2 cache. I believ the two CPUs operate fully independently.
It seems HT CPUs were just a transitional state between older single CPU chips and modern multi-core chips.
Hmm, that's stretching it a bit I think. The P4 Hyperthreading is AFAIK an improved version of the Xeon <something>threading. The HT bit still resides on the same die, whereas the dual-core has two dies. I tend to think of a dual-core as simply two processors, nothing more, nothing less. But a lot cheaper to buy and to run! /Per Jessen, Zürich