hyperthreading questions

Did you read what Hyperthreading really is from Intel?
http://www.intel.com/business/bss/products/hyperthreading/overview.htm

These are the best 3 I could find that you really should atleast look at (if not read all of them)
http://www.lostcircuits.com/cpu/p4_306/
http://www.pcworld.com/news/article/0,aid,106898,00.asp
http://www.zdnet.com.au/reviews/com...20270038,00.htm


Also:
Advantages

Intel claims threading an application can result in increased performance on a uni-processor machine or for a multi-processor application. Threads can make a GUI more responsive. They can also facilitate the overlap of I/ O and computation. If multiple processors are available, threaded applications may see substantial speedup.

Disadvantages

Threading an existing serial application increases the complexity of the application, Intel says. Sharing of resources, such as global data, can introduce common parallel programming errors such as storage conflicts and other race conditions. Debugging such problems is difficult as they are non-deterministic, and introducing debugging probes, such as print statements, can mask these errors.

Source:http://www.tomshardware.com/cpu/20021227/hyperthreading-01.html (Looks like the next link from Babaloo's Link?)

I have been using the 3.20 NON HT processor since I built this machine in January.  I run it on as Asus P4800 Deluxe Motherboard with 2gb PC 3200 DDR400 RAM.

When prices dropped dramtically, I got the 3.20 HT Processor and yes it made a difference in my Apps I run, which are mostly Processor intensive.  When you use HT, the system will actually see two processors, you too can see this in the Device Manager.  It isn't a great noticable difference in overall speed until you begin to multi tasking (running serveral Processor intensive programs) then you will see the real difference.

In the upcoming months, software makers are already getting inline to produce their programs to especially gear towards the benifits of HT, some are already available.

There are only 2 P4 HT Processor that have the 90.nm core, and also has a 1mb L3 cache, it is a faster processor due to the fact that all others in the 478 pin catagory are .13u cores with L1 cache 8kb, L2 Cache at 512kb and they come in speeds of

Socket 487 Prescott 3.0E $187.50
Socket 487 Prescott 3.20 $217.50 These are the only 478 Pin Precotts out there w/90nm cores, the rest or Northwood

No offence boxrick, but I thhink you mean Socket T with the Prescott Processors which are smaller, all are .90nm and 775 pin.  There is a list of the Prescotts:

http://www.zipzoomfly.com/jsp/ProductList.jsp?ThirdCategoryCode=010426

All are 90nm cores, Socket T 775 Pin and they range from:

Prescott 2.8 800 FSB $158.00
Prescott 3.0 800 FSB $177.00
Prescott 3.2 800 FSB $215.90
Prescott 3.4 800 FSB $278.00
Prescott 3.6 800 FSB $435.00

In late 2005 or in 2006, you befing to see dual core Intel Processors, most liley 2006.

Thanks

wlennon

I have run Dual processor computers for a long time now, and I dont think there is a speed difference in the HyperThreaded CPU of the same speed rating at all. The speed comes totally from the computer being smarter about how to do simple tasks. As wlennon stated, you see all the benefits when you multitask. Your clock functions are separated from your Word functions, etc. I do computer graphics quite heavily and the programs I use can use multiple processors, so they definitely benefit from Hyperthreading. The games do not, however, if I am downloading a security update in the background and playing a game, or doing email, etc.. the system has more area to do its "thing". (The intel links above really show that and it does work like that).

It is my opinion though that you are never going to exceed the speed of your hard drives and if you are concerned about speed of your system, I would personally look there first. All of my systems are SCSI based for some silly reason.