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SingularNugget
Joined: 20 Sep 2025
Posts: 14
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 Posted: Mon Sep 22, 2025 2:16 pm Post subject: |
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This is the board the CPU was originally on I believe, an ASUS P5WDG2-WS|
(sorry for the image quality, my phone is not very good) |
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wren4777
Joined: 13 Dec 2016
Posts: 571
Location: Litija, Slovenia
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| Posted: Mon Sep 22, 2025 2:23 pm Post subject: |
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If you don't have any other 775 boards, it might be worth at least seeing if that one will post. Though try it with a spare CPU first, just in case...
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Calbris
Joined: 06 Feb 2019
Posts: 157
Location: Singapore
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| Posted: Tue Sep 23, 2025 6:06 am Post subject: RE: Intel Pentium Extreme Edition 980 |
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| xsecret wrote: | | A very interesting test would be to boot this cpu at 14x multiplier. The PNS could change accordingly. Some ES samples have the PNS read-only fuse not blown, leaving the BIOS program it at boot time. |
Will the BIOS reprogram the PNS again if the multiplier changes after booting up? There are many old tools that are capable of changing the multiplier of a Pentium 4 with SpeedStep if I'm not mistaken, such as CrystalCPUID and CPU MSR.
I'm assuming that the multiplier could be changed under any OS, then suspending to RAM (standby) or disk (hibernate) under XP in this case could allow the BIOS to reprogram the PNS after resuming from suspend. The problem is, I don't know if the PNS is set to read-write or read-only after the CPU boots into an OS. If it's set to read-only, this wouldn't work at all.
| SingularNugget wrote: | | Unfortunately I don't think the motherboard supports changing the multiplier, there isn't a setting for it anywhere in the bios |
It should, you just can't change it with a BIOS option since there aren't any available. However, you could change the multiplier in Windows XP using these two tools:
With CrystalCPUID 4.15.5.452e x86
Start CrystalCPUID.exe, then click the 'Function tab' and select 'Intel Enhanced SpeedStep Control'. A small window labeled 'Intel Enhanced SpeedStep' will show up, then click the dropdown menu on the right side of the 'New Multiplier' setting. Select '14.0x', and check if the multiplier has changed using the same program or with CPU-Z. Just so you know, the new multiplier setting applies immediately if you didn't tick the 'Show Confirmed Dialog' checkbox. I suggest not to mess with the core voltage via 'Enable Change Voltage', unless you know the highest stock VID set for this CPU.
With CPU MSR v0.90
Install the LLADrv 1.0 XP 32b driver first, otherwise it won't work because CPU MSR uses this driver to access the model specific registers (MSRs) to control your CPU. There should be a setup.exe that installs it in the driver's folder. Run that, and CPU MSR should work after it's installed.
Once installed, start CPUMSR.exe. If you have Hyper-Threading enabled, there will be two CPUs shown under the 'CPU Select' dropdown menu. I think you might have to apply this setting for both logical cores, though I'm not so sure about that since I always disable Hyper-Threading on my Northwood anyway.
Select the old Intel Pentium 4 logo on the left side of the main menu, there should be a scroll bar if you don't see the logo on the left side. Once you've selected the Pentium 4 menu, you should see the 'Frequency & Voltage Control' tab. Click that and select '14x' on the 'Change Multiplier to' dropdown menu, then click the 'Set' button. Before that, make sure the voltage is correctly set to 1.2625V via the 'at a Voltage of' dropdown menu. I assume that's your core voltage since CPU-Z reports it as 1.264 V and the closest VID option for that voltage is 1.2625V.
Note that you have to select a value for multiplier and voltage with CPU MSR as it needs both values to apply the setting. CrystalCPUID doesn't and will take either setting to apply it. |
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SingularNugget
Joined: 20 Sep 2025
Posts: 14
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| Posted: Wed Sep 24, 2025 12:08 am Post subject: |
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https://valid.x86.fr/4yki3y
Found a board that works and supports the CPU, unfortunately its a lower power board with only 4 pin CPU power connector, in CPU-Z i could see it constantly switching between x12 and x15 multiplier, I'm guessing it's a power limitation. |
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wren4777
Joined: 13 Dec 2016
Posts: 571
Location: Litija, Slovenia
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| Posted: Wed Sep 24, 2025 12:24 am Post subject: |
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That's probably just Intel speedstep, right?
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xsecret
Joined: 01 Feb 2004
Posts: 1847
Location: France
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Binary_Nexus
Joined: 26 Dec 2023
Posts: 25
Location: United Kingdom
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| Posted: Wed Sep 24, 2025 9:08 am Post subject: |
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| I wonder who on earth was just running this chip in the wild and never mentioned it. Maybe an ex-Intel employee? |
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xsecret
Joined: 01 Feb 2004
Posts: 1847
Location: France
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| Posted: Wed Sep 24, 2025 11:25 am Post subject: |
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Technically, the 4.00 GHz frequency isn’t unknown. There are over 50 Q-spec (and even S-spec) entries for 4.00 GHz Pentium 4s (Prescott-1M, -2M, and Cedar Mill) as well as Pentium Ds. In fact, the highest listed NetBurst sample is listed at 4.26 GHz.
What makes this one really special is that it carries its final PNS, meaning it isn’t an ES but a QS. That’s highly unexpected.
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ApostolCV
Joined: 26 May 2020
Posts: 207
Location: Ukraine
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| Posted: Wed Sep 24, 2025 12:46 pm Post subject: |
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| /to xsecret, is the sourses of Q-SPECS you had mentioned confidential ? Is it possible to get acquainted with the scientists’ data? |
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max1024
Joined: 15 Jan 2015
Posts: 636
Location: Belarus
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| Posted: Wed Sep 24, 2025 1:20 pm Post subject: |
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| Very interesting story! I can only suggest SingularNugget send this CPU to xsecret that to know all information about this CPU. |
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wren4777
Joined: 13 Dec 2016
Posts: 571
Location: Litija, Slovenia
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| Posted: Wed Sep 24, 2025 2:49 pm Post subject: |
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| xsecret wrote: | Technically, the 4.00 GHz frequency isn’t unknown. There are over 50 Q-spec (and even S-spec) entries for 4.00 GHz Pentium 4s (Prescott-1M, -2M, and Cedar Mill) as well as Pentium Ds. In fact, the highest listed NetBurst sample is listed at 4.26 GHz.
What makes this one really special is that it carries its final PNS, meaning it isn’t an ES but a QS. That’s highly unexpected. |
If I'm not mistaken, it's the only 4ghz netburst to have been physically documented, right? At least publicly. I don't remember reading anything about the Pentium 4 "580" being "found".
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max1024
Joined: 15 Jan 2015
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Location: Belarus
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| Posted: Thu Sep 25, 2025 12:44 pm Post subject: |
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I have a question, so why Extreme Edition 980? Previous model number was 840  |
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wren4777
Joined: 13 Dec 2016
Posts: 571
Location: Litija, Slovenia
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| Posted: Thu Sep 25, 2025 12:45 pm Post subject: |
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That was the 90nm extreme, the 65nm extremes were 955 and 965.
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max1024
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xsecret
Joined: 01 Feb 2004
Posts: 1847
Location: France
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| Posted: Fri Sep 26, 2025 4:42 am Post subject: |
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| wren4777 wrote: | | xsecret wrote: | Technically, the 4.00 GHz frequency isn’t unknown. There are over 50 Q-spec (and even S-spec) entries for 4.00 GHz Pentium 4s (Prescott-1M, -2M, and Cedar Mill) as well as Pentium Ds. In fact, the highest listed NetBurst sample is listed at 4.26 GHz.
What makes this one really special is that it carries its final PNS, meaning it isn’t an ES but a QS. That’s highly unexpected. |
If I'm not mistaken, it's the only 4ghz netburst to have been physically documented, right? At least publicly. I don't remember reading anything about the Pentium 4 "580" being "found". |
Not exactly. There is known samples of Netburst CPU listed as 4 GHz, but they're ES, so they're multiplier unlocked and their PNS is "Genuine Intel". You can't tell if they were built as 4 GHz sample, or 3.8 GHz or whatever, unless you have access to the Intel DB.
What makes this one special is that it behaves like a QS, being multiplier locked and carrying its final PNS. Note that the retail PNS on this one does NOT looks like a real retail marketing name. It may have be programmed this way for a marketing event, maybe IDF Fall 2005. I was there at the time and can't remember any 4 GHz part being demonstrated as Intel switched all marketing to the upcoming Conroe (Core 2) at that time.
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