Some truth about Dual-core & Hyper Threading

To put to rest the talk of why there is no HTT enabled Dual-Core CPU's I have compiled this. As it turns out the Pentium Extreme Edition is a Dual-Core Procceser, That also supports HyperThreading Technology(HTT). So, therefore it shows up as 4 CPU's in Windows although a Qaud-Core is much faster.
Source C Magazine ''PC Biulding Bible''

Now An Article From Wikipedia
Original Article Here​

Smithfield​

.Pentium Extreme Edition was introduced at the Spring 2005 Intel Developers Forum, not to be confused with the "Pentium 4 Extreme Edition" (an earlier, single-core processor occupying the same niche). The processor was based on the dual-core Pentium D branded Smithfield, but with Hyper-threading enabled, thus any operating system saw 4 logical processors (2 physical x 2 virtual cores). It also had an unlocked multiplier to allow overclocking. It was initially released as Intel Pentium Extreme Edition 840 at 3.20 GHz, in early 2005, at a price point of $999.99 (OEM version) or $1,200 (Retail). The only chipsets that worked with the Extreme Edition 840 were the Intel's 955X, NVIDIA's nForce4 SLI Intel Edition, and ATi Radeon Xpress 200. Using a Pentium Extreme Edition branded CPU with an Intel 945-series chipset will disable Hyper-threading effectively turning the processor into a Pentium D branded equivalent.

Presler​

The Pentium Extreme Edition based on the dual-core Pentium D branded Presler was introduced as the 955 model, at 3.46 GHz, and used a 1066 MT/s FSB compared to the 800 MT/s in the non-extreme edition. A second version, the 965 at 3.73 GHz followed in March 2006. Many overclockers, however, have been able to overclock the core to 4.26 GHz using air cooling simply by raising the unlocked CPU multiplier.

The Presler Extreme Edition would only run combined with the Intel 975X chipset. The i975X featured the ICH7R southbridge and supported all Socket T (LGA775) Pentium 4, Pentium D, and Pentium Extreme Edition branded processors.


Original Pentium Extreme Edition logo Spring 2005

Pentium Extreme Edition logo as of 2006

 

Thanks buddy.

 

Out of curiosity, what's the point of this thread?

 

To put to rest the talk of why Intel doesn't Have HTT enabled Dual-Core CPU's. It actually did & Says it will in the Future but, for now its to pricey.

 

so my T7500 has no hyperthreading ? That really SUCKS

 

No Alkaeda, it doesnt the only Proc.s to support this were the Pentium 4's standing out but, you have Dual-Core which is way better then HTT could ever be.

 

Nehalem-based chipped will support HyperThreading.

The 8-cored, single die version of Nehalem with HyperThreading will be interesting, indeed.

 

Very, Wonder what the price will be I know I won't by them as its a waste. Who could need more then 8 threads????
Wonder what the WPrime times will be?

 

Hmm, too big images. But Nehalem will be awesome. Think of two 8 core Nehalems with HTT enabled. That's 32 simultaneus threads! Crazy...

 

or a quad socket board.

HT was more of a gimmick for P4's though and due to this it was less effective than it could have been. In many instances the lack of being able to tell HT to turn on or off for certain programs caused performance degredation.

Intel 5000x chipsets almost have a form of HTT with the 16mb integrated snoopfilter, it can be seen that when using two quadcore Xeon cpu's the snoopfilter is overrun as well and performance is lost on many applications. This is also partly due to the non-inclusive nature of the L2 on the separated dual-dies of each CPU causing excessive system bandwidth useage on the already limited FB-DIMM's...

 

Well, if they stick with a similar form of hyperthreading as P4 used, it won't run 2 thread simultaneously. It'll just switch between them so when one thread gets stalled, the other is allowed to run. But each core will never run more than 1 thread at a time.

SMT will only really get interesting when they make each core able to run multiple threads simultaneously.

 

Oh yeah. I forgot that HTT is not the best implementation of SMT.

 

HTT was a Failure Intel's trying to cover up with this ''transistor prices'' thing.
I amagine Nelaham will have a better implement of SMT.