Hmm not sure if a Ceadar Mill P4 would work in there but they are 65watt CPUs, they are 800 FSB and the P4 HT 661 SL9KD (D0) is a 3.6ghz 65watt part, might be a little hard to find on on eBay but I have seen them up on there on a regular basis. (Avoid the C0 and B0 models, they are 86watt parts)

You wont get much lower than 65watts with the P4 and Ceadar Mill is the last models released, the P4 always ran silly hot.

TrashPanda wrote on 2022-01-24, 17:25:

Hmm not sure if a Ceadar Mill P4 would work in there but they are 65watt CPUs, they are 800 FSB and the P4 HT 661 SL9KD (D0) is a 3.6ghz 65watt part, might be a little hard to find on on eBay but I have seen them up on there on a regular basis. (Avoid the C0 and B0 models, they are 86watt parts)

You wont get much lower than 65watts with the P4 and Ceadar Mill is the last models released, the P4 always ran silly hot.

but cedar mill is only socket 775 isn't it? My socket is 478.

Rikintosh wrote on 2022-01-24, 17:57:

TrashPanda wrote on 2022-01-24, 17:25:

Hmm not sure if a Ceadar Mill P4 would work in there but they are 65watt CPUs, they are 800 FSB and the P4 HT 661 SL9KD (D0) is a 3.6ghz 65watt part, might be a little hard to find on on eBay but I have seen them up on there on a regular basis. (Avoid the C0 and B0 models, they are 86watt parts)

You wont get much lower than 65watts with the P4 and Ceadar Mill is the last models released, the P4 always ran silly hot.

but cedar mill is only socket 775 isn't it? My socket is 478.

ah well then it gets even harder.

Looking at the list the P4 HT 2.4c SL6Z3 (M0) at 66 watts is the lowest you could go for desktop P4's, if your bios support Pentium-M processors you could go a lot lower.

It is a weird laptop. According to a newegg listing, it did come with a 2.8GHz Pentium 4, but based on the specs, it supposed to be a desktop Northwood. I can't find a 2.8GHz mobile CPU on Intel's site with 800MHz FSB in the Prescott line either. I'm surprised a manufacturer made a laptop like this with a dedicated GPU and had the cooling capacity to make it work.

I wouldn't attempt anything higher than 54.3W, It'll be far from bottlenecking the Go5200.

RandomStranger wrote on 2022-01-24, 18:35:

It is a weird laptop. According to a newegg listing, it did come with a 2.8GHz Pentium 4, but based on the specs, it supposed to be a desktop Northwood. I can't find a 2.8GHz mobile CPU on Intel's site with 800MHz FSB in the Prescott line either. I'm surprised a manufacturer made a laptop like this with a dedicated GPU and had the cooling capacity to make it work.

I wouldn't attempt anything higher than 54.3W, It'll be far from bottlenecking the Go5200.

Im using this list here
https://en.wikipedia.org/wiki/List_of_Intel_P … um_4_processors

Weirdly the TDP listed on Wikipedia is different from the Intel Ark.

I could be wrong, but I think there was a version of this toshiba P25, which was S670 or something, that had a 3.2 or 3.4ghz processor, and an fx5700, but it uses the same cooling system. The system is well designed, and as far as I can consider it pretty quiet, I think my problem is that things on the motherboard are already old, capacitors, inductors, would need are already "tired", so I just want to go with something that gives less work for him to perform.

I once found I beat up, broken Packard Bell laptop that had a S478 P4 2.8GHz Northwood, it had a nice, efficient heatpipe cooler for the CPU. I disassembled it and kept the CPU + the cooler, the rest of the laptop was too broken to be of any use. The CPU was a standard s478 desktop CPU, I should have it somewhere. The laptop had full size desktop RAM slots also. It sounds like your Toshiba laptop was rather similar to the Packard Bell one I found.

Looking briefly at the CPUs at
https://www.cpu-world.com/CPUs/Pentium_4/TYPE … 0Northwood.html
You will have to chose a CPU with lower clock speed for lesser TDP.

If you can use a Pentium 4-M, these have a relatively low TDP as far as P4s go, and still will probably be OK when matched with a GeForce Go 5200, as RandomStranger mentioned.

Yes, but the P4-M or Mobile P4, use lower voltages, if I put them, they wouldn't fry? I don't know how this laptop's voltage detection works

RandomStranger wrote on 2022-01-24, 18:35:

It is a weird laptop. According to a newegg listing, it did come with a 2.8GHz Pentium 4, but based on the specs, it supposed to be a desktop Northwood. I can't find a 2.8GHz mobile CPU on Intel's site with 800MHz FSB in the Prescott line either. I'm surprised a manufacturer made a laptop like this with a dedicated GPU and had the cooling capacity to make it work.

I wouldn't attempt anything higher than 54.3W, It'll be far from bottlenecking the Go5200.

At one point I scrapped a Gateway desktop replacement laptop with Intel Extreme graphics. 3.06watt 533fsb Prescott, slapping it in a random VIA 478 board yielded a low power 1.8ghz mode you could switch on and off. Always thought it would have made an interesting 98/XP build.

I have an Acer aspire 1600 with a P4 2.4, https://www.cpu-world.com/CPUs/Pentium_ ... 400D).html . And the fan is working hard almost all the time.
It's the lowest TDP P4 Northwood desktop processor I think, 59,8W, the 2.8 is 69,7W and the 3.0 is 81,9W. There's more than 10W difference between the 2.8 and the 3.0 cpus, Sure it's enough to overheat the cooling system, consider the size of the cooler on desktop boards. But that toshiba laptop seems to have a very good cooling system, maybe a heat pipe failed, because I guess that when you upgraded the cpu the laptop worked well, If not, I imagine that you would have reinstalled the previous one.

Rikintosh wrote on 2022-01-25, 01:58:

Yes, but the P4-M or Mobile P4, use lower voltages, if I put them, they wouldn't fry? I don't know how this laptop's voltage detection works

It's not only lower voltage (though it's better to look up into a datasheet of a CPU).
Once I tried to run P4-M with a desktop motherboard (i865) . A CPU was "rock solid" but its clock was only 1200MHz and I couldn't make it higher.
So I read datasheets and undesrtood that a P4-M runs well with a motherboard based on mobile ICH hub only (eg ICH4-M).
Although, please correct me if I'm wrong about that and you had positive experience.

P.S. Also the schematics seems available for free

What's the exact stepping of the current CPU? Can run CPU-Z to find out.

For a first pass lookup, I always found these pages very handy https://www.pchardwarelinks.com/elec.htm they were originally at users.erols.com/~chare or something close, that's from memory. However, when you find something interesting, double check it at cpuworld or other resource.