P4m in a desktop s478 board?

[Kivada]

Refurbishing an old Compaq Presario 6421US, can I use a mobile P4 in place of the 2Ghz Celeron it came with? If not is the Celeron faster then the 1.8Ghz P4 Willamette I've got in the junk pile?

I've noticed that I can't get contact with the stock block with the mobile P4 since it doesn't have a heatspreader, is there a way to fill the void? Should I chance killing it and use Arctic Silver Epoxy to attach the heatsink?

 

[Soulkeeper]

I ran a 1.8GHz p4m in a desktop motherboard for over a year
they do work, assuming your bios doesn't give you any trouble.

As far as the celeron vs. willamette it'll come down to:

.13 (castrated northwood) vs. .18u (willamette)
128KB vs. 256KB l2

been awhile since i've read P4 benchmarks, but i'd likely go with the celeron in that case, with the hopes that it would run cooler and overclock a little higher ...

 

[formulav8]

The first P4's at similar clockspeeds to the Celeron will walk all over the Celeron. The celeron has half the cache and half of the P4's hitrate. The Celeron scales Awefully! Just looks at some beches of those Northwood Celerons from 2ghz to 2.6ghz or something. Its just cut down way to much. If your only browsing then either cpu will be ok for that.

 

[JWade]

for $10 shipped from starmicro.net you can get a 2.2ghz P4 (512k, 400mhz bus) desktop processor.

 

[VirtualLarry]

Be aware that the P4M chips supported SpeedStep, and will be locked at a 12x multi in a desktop board. It's best if you can force FSB frequencies, because the default FSB on a P4M is 100Mhz, so if you can force that to 200Mhz, you can overclock it, and then you effectively don't have to worry about the 12x multi slowing you down.

I've used a 2.0Ghz P4M in a 845PE chipset mobo from QDI, and I have it overclocked to 200x12, or 2.4Ghz.

 

[Caribbean Geek]

I would go to that P4 2.20GHz, Celeron is too crippled and will slow down to a crawl with two or three Internet Explorer tabs. I've been in such situation with other people's PCs.

 

[TurtleCrusher]

Don't even bother with the celeron. It's branded that way for a reason. It's castrated. A slower clocked P4 should still walk all over it.

 

[Kivada]

Ok ,so how can I get contact to the P4M? It's shorter then the desktop chips so I can't get the stock cooler to make contact.

Also, I remember the Willamette cores where slower then P3s of the same era.

 

[VirtualLarry]

Interestingly, I had to source an original OEM Intel S478 heatsink to get it to work with the P4M, because it doesn't have a heatspreader. The OEM heatsink was the only one that would drop down in further, and make contact. So I don't know why you are having trouble with it.

 

[Kivada]

Interestingly, I had to source an original OEM Intel S478 heatsink to get it to work with the P4M, because it doesn't have a heatspreader. The OEM heatsink was the only one that would drop down in further, and make contact. So I don't know why you are having trouble with it.

The heatsink is from a compaq, which is likely why, it's completely flat on the bottom.