At what voltage will a C400 turn to smoke?

[Godfodda]

I've finally ordered a slotket for my PCChips board/Celeron 400 combo. It's a Gigabyte with voltage adjustments up to 3.5. The Celeron (66x6) has a default vcore of 2.0. Since my only available FSB options on the board are 66 and 100, I'm planning to over-volt until it'll post and load at 600 (100x6). Any ideas on how much juice I can pump into it before I kill it (or anything else)? BTW, killing it won't, of course, be a big loss. :)

[wayshot]

As far as I know, 2.8 V or more could kill a [Mendocino] Celeron. Voltages up to 2.4-2.5 V should be safe.

Only 66 and 100 MHz FSB's? Check if SoftFSB or CPUFSB works with your 'board. Maybe you'd get 75 or 83 MHz or something...

[deez]

My 500 ran smooth at 600 at 2.3v

600 is about the max for the old cele's with air

[Godfodda]

Originally posted by wayshot
Only 66 and 100 MHz FSB's? Check if SoftFSB or CPUFSB works with your 'board. Maybe you'd get 75 or 83 MHz or something...

SoftFSB doesn't support it. I'd never heard of CPUFSB before now. I'll look it up, but I'm not holding my breath. Thanks for the info.

[D2DM]

if it's an old stepping mendocino 400 it may do 450 or slightly more. But no way 600.

The newer stepping can reach 540/575 and with better than average chip and cooling perhaps 600.

Voltage.. better cooling = higher voltage possible.
2.4 max on air.. me thinks.

[Yodums]

Those 400 Celeron's will most likely hit 500 no matter what but anything over 500 will mostly crap out.

[batboy]

A really good overclock for those old celerons is 500 to 550, so good luck going for 600, but you might as well try, who knows...you might get lucky. I suggest the best cooling you can get. I don't usually recommend anymore than 2.2v or 2.3v with the retail HSF, but if you use Arctic Silver and lap the heatsink, 2.4v might be ok. Above that gets risky unless you have exceptional cooling. I used to have a big honking heatsink with triple fans on it for my old Celly 300 and I was "only" able to hit 504 with it (but I never went above 2.3v). It's hard to find good coolers for those old Cellies nowadays without spending more money than they're worth.

[CrystalMethod]

I can't push past 500 with mine, but it migt be that the next FSB option is 94 Mhz, which is quite the jump from 83. It'll do it no matter what I raise the Vcore to. Couldn't get it past 450 with my P3V4X, which I thought was strange, after it went straight to 500 on this crappy Aopen board...

[Godfodda]

UPDATE

Got the Slotket in yesterday. It's a Gigabyte GA-6R7 (Plus or Pro, don't know which) with auto-detect FSB and jumper selectable voltage. Installed at 2.2 volts. BIOS read it at 2.13-2.14. Booted no problem at 600 and still running. BIOS, SETISpy, and Sandra report it at this speed.

I have a retail P3 HSF on the CPU and load temps are in the mid-40s, but ambient is pretty cool. Running SETI full-time since I started it up.

Wish I had more FSB options on this board now so I could see how far it would go. :)

[batboy]

Holy guano....that's amazing...congrats.

[Godfodda]

Originally posted by batboy
Holy guano....that's amazing...congrats.

hehe... Thanks. Think I'm headed to post it in the DB, too.

About time I had an easy one after all the trouble I've had with this 1100. :mad:

[Wam]

I o/c three Cel 400's... one could only do 500 but the other two were capable of 570+. Mine own Cel400 was stable at 618 using 2.3V. I reckon 2.3V will get you to the maxium of what the chip is capable of. If you can keep it cool enough than 600 is viable especially if you know the chip can do 550+... an addition of a 120mm case fan made 618 stable instead of 600.

[Sir-Epix]

Originally posted by Godfodda
I've finally ordered a slotket for my PCChips board/Celeron 400 combo. It's a Gigabyte with voltage adjustments up to 3.5. The Celeron (66x6) has a default vcore of 2.0. Since my only available FSB options on the board are 66 and 100, I'm planning to over-volt until it'll post and load at 600 (100x6). Any ideas on how much juice I can pump into it before I kill it (or anything else)? BTW, killing it won't, of course, be a big loss. :)

Have you used that board, I think it is the same one I use. If it is you have 66/75/83/100/112. I can't get my Celeron above 450, because I don't have anything to bump up my voltage. Let me know how you do!

[dude]

All this old celeron talk makes me want to bust out the old 333. I could get mine to post a 667. It ran stable at 600 with out any real tweaking. I wonder what it would do if a laped it and put a better cooler on it. I never had to adjust the voltage either. I just have to wait for my WB6 to come back. The WB6 is one cheap motherboard wiht great overclocking options.

[Kingslayer]

Originally posted by deez
My 500 ran smooth at 600 at 2.3v

600 is about the max for the old cele's with air

Deez, can you explain to me how you got CAK-38's to fit on a BP-6 and how you got two PIII's to run on it?

[Godfodda]

Originally posted by Sir-Epix


Have you used that board, I think it is the same one I use. If it is you have 66/75/83/100/112. I can't get my Celeron above 450, because I don't have anything to bump up my voltage. Let me know how you do!

This one is the M748LMRT. I'm pretty sure it doesn't have any other FSB options... but if you know something I don't, speak up!!! :D

Oh, BTW, I did find that it's supported by CPUFSB. One of these nights, I'm going to play with that. :)

[deez]

Originally posted by Kingslayer


Deez, can you explain to me how you got CAK-38's to fit on a BP-6 and how you got two PIII's to run on it?

I'm not running dual P3's but its possible with mods check here for more info http://bp6.gamesquad.net/PIII.phtml

The base of the CAK-38 is 60x60 and it will fit on both sockets of the BP6. I'm currently using powerleap Neo (PPGA->FCPGA)adapter which comes with a HS with oversized clip. You must use this clip on the CAK-38 with adapter in order to maintain proper pressure on the CPU.