Tom's Hardware > Forum > CPU & Components > CPUs > Question about HyperThreaded CPU?

Question about HyperThreaded CPU?

Forum CPU & Components : CPUs - Question about HyperThreaded CPU?

Tom's Hardware: Over 1.4 million members in 6 different countries available to answer all your high-tech questions. Sign up now! Its free!
Ask the community Add a reply
Word :    Username :           
 
randomguy   12-20-2003 at 07:50:47 PM

Hey everyone. This is my first post!

I just upgraded from a 2.4GHz P4 to a 3.2 w/HT. My motherboard is an Intel 865 PERL board. So the 2.4 ran just fine, but the 3.2GHz chip is always displayed as a 1.6GHz CPU.

For example, under my "system properties" it says "Pentium 4 CPU 3.20GHz" and then right below that it says "1.60GHz"

It shows up the same way in Sandra, listing that its a 3.2GHz chip running at 1.6.

It shows up in my BIOS as a 1.6GHz chip. Here's where it gets weird though. I moved a jumper on my motherboard to bring it to "setup" mode. When I did that, it opened up a new category in the BIOS where I could adjust the multiplier, but it was identified already as a 3.2GHz chip! So I figured everything had sorted itself out and set it back to normal. When I did that it was being seen as a 1.6! CRAP!

So my question is, does Hyperthreading cause it to look like there are two 1.6GHz chips instead of a single 3.2GHz chip?

also, in my device manager it lists two 3.2GHz CPUs. Isn't this weird?

Add a reply
Sponsored Links
Register or log in to remove.
Crashman   12-20-2003 at 09:55:43 PM
- 0 +

Nope, HT makes it look like 2 3.2GHz chips. It sounds like your bus speed is running at "400MHz" (100MHz clock) instead of "800MHz" (200MHz clock).

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

Reply to Crashman
randomguy   12-20-2003 at 10:00:29 PM
- 0 +

Thanks for your reply. In my BIOS there is a setting for memory speed and the options are 266, 333 or 400. I have 1GB of DDR400 (PC3200) installed, so selected 400MHz. According to the "setup mode" the mulitplier is set at 8, so 8 x 400 equals 32 yes?

Obviously it seems like the memory is set at only half-speed, thus half the processor speed showing up. I just don't know how to change that.

Reply to randomguy
randomguy   12-20-2003 at 10:13:29 PM
- 0 +

Also, in my BIOS it says the following:

Processor: 1.6AGHz
System Bus speed: 800MHz
System memory speed: 400MHz

and like I said earlier, the only setting for memory in the BIOS is under the "chipset settings" menu, and then "memory settings" where it allows me to change the memory settings from 266, 333, or 400MHz. The only weird thing is that whatever I set it to doesn't get saved as the second I return back to that page it's set to "auto" rather than "user defined."

Reply to randomguy
Crashman   12-20-2003 at 10:29:07 PM
- 0 +

A P4 3.2GHz runs with a multiplier of 16 and a bus clock of 200MHz. The "800MHz" bus is based on a true clock speed of 200MHz, using Quad Data Rate technology.

BIOS should report your actual bus speed at 200MHz and your DDR SDRAM speed of 400MHz, even though that's also really 200MHz.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

Reply to Crashman
randomguy   12-20-2003 at 10:50:49 PM
- 0 +

Thanks for your responses. I really appreciate it!

I moved the jumper again to go into "setup mode" in the BIOS. When I got there it said "CPU multiplier" and it was set at "8" but right below that it said "actual multiplier ratio" and it said "16." I was unable to change the multiplier.

But when I moved over to the main screen (the screen that normally says I have a 1.6) it said it was a 3.2. So I click "save changes" and reboot and it's back to a 1.6. I don't have any idea why it's doing this!

Reply to randomguy
Crashman   12-21-2003 at 02:24:55 AM
- 0 +

You should email Intel!

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

Reply to Crashman
Vapor   12-21-2003 at 02:40:06 AM
- 0 +

Or send it to Scottchen...he could get a SICK OC outta that (if the multiplier is really only at 8)! Of course, he'd need DDR800 or greater...

Damn Rambus.

Reply to Vapor
juin   12-21-2003 at 03:23:57 AM
- 0 +

When you run sisoft benchmark are score are similar to a P4 3.2GHZ or 1.6GHZ

I dont like french test

Reply to juin
Crashman   12-21-2003 at 05:00:40 AM
- 0 +

No, just the reverse would be true. If the multiplier really was 8, he'd never find a board capable of making it to the CPU's rated speed of 3.2GHz

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

Reply to Crashman
Vapor   12-21-2003 at 05:43:58 AM
- 0 +

What I'm saying is that if he gets it to run at 3.2 (he's a genius at OCing...I bet he would find SOME way, but only if he had the right components), it would be the fastest chip that any of us would have. He would have a 1600MHz FSB--if he got it to work--and 12.8GB/s of bandwidth. Chances are, however, that it is completely impossible (because of any board's incapability to run that fast [as you said]).

Wow, I just realized that I repeated what you said, but in a lot more confusing way. Oh well.

Damn Rambus.

Reply to Vapor
randomguy   12-21-2003 at 08:43:40 PM
- 0 +

I did that and the scores were equal to a P4 1.6.

So, to summarize, when in "setup" mode the BIOS reports the CPU as being a 3.2.

In normal Windows mode the BIOS says it's a 1.6.

Device manager shows two 3.2 chips.

also, i don't think this makes any difference but it is an unlocked engineering sample CPU.

Reply to randomguy
juin   12-21-2003 at 11:08:33 PM
- 0 +

are you saying you got one or you ask if that is one

I dont like french test

Reply to juin
randomguy   12-22-2003 at 12:44:41 AM
- 0 +

I'm saying it is one.

Reply to randomguy
Crashman   12-22-2003 at 05:36:10 AM
- 0 +

Intel CPU's have a CPU ID imprinted in them. BIOS is telling you it's a P4 3.2C running at 1.6A speed.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

Reply to Crashman
randomguy   12-22-2003 at 08:36:02 AM
- 0 +

yes, that is correct. I really appreciate everyone's responses by the way! So I still don't have a solution to this problem though. This is so frustrating.

Reply to randomguy
Crashman   12-22-2003 at 09:11:10 AM
- 0 +

Have you tried talking to Intel's tech support?

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

Reply to Crashman
Ask the community Add a reply
Tom's Hardware > Forum > CPU & Components > CPUs > Question about HyperThreaded CPU?
Go to:

There are 1074 identified and unidentified users. To see the list of identified users, Click here.

Forum map
Bestofmedia Forum ©
2000-2009 Bestofmedia Group
Page generated in 0.341 seconds
Please mind

You are about to answer a thread that has been inactive for more than 6 months.
If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.

Add a reply Cancel
Sponsored links
  • Ask the community now
  • Publish
Ad
Related Topics
See all relatives topics
They won a badge
Join us in greeting them
How do I win badges?