Bus speeds for Celeron 400A on P3V4X?

[smithpd]

I just put a slot 1 Celeron 400A (the original celeron) into my P3V4X and found that the only CPU speeds available under the Manual setting are 600, 600, and 800. It won't post at 600 (100 MHz bus speed). Is there any BIOS setting I can use to select intermediate bus speeds like 75 MHz or 83 MHz (or in-between) to use with the Celeron?

By the way, the P3V4X has a broad range of CPU speed selections for my PIII-550E, so there seems to be something peculiar about the Celeron implementation, or bus speeds less than 100, with this motherboard.

If the answer to the above is no, what motherboard would you recommend to overclock the Celeron? It must also work with PIII coppermines, so I can upgrade later. Any ideas?

 

[smithpd]

So, there are no Celeron enthusiasts out there? I know it's not current. I just want to use it in a second computer a little while longer.

I was mistaken in my original post. The manual adjustment was there all along -- I had just forgotten how to work it.

The P3V4X gives limited choices: 66, 68, 75, 83, and a few above that. My celeron worked one time at 75 but failed to POST at 75 three times. 2.1 V didn't help. That's it. No overclocking on this one.

I will make another post on the overclocking forum to see if this is expected behavior.

 

[Klosters]

The 68, 75, and 83 Mhz FSB's are selectable. You might want to sit down and read the mainboard manual. Asus's manuals are top notch.

*Edit. I see that I should have read your second post carefully. Hoisted by my own petard. The shame!

If you want a shot at 450, 498, or the holy grail 600 Mhz you have to take steps. If you have a FAB-28 HSF for instance, put the biggest(same diameter. If 50mm's are on it now, get 50mm's that are a lot taller and push some air) fans on it you possibly can. The stock fans are weaklings. Lap your Celly's slug. Directions can be found at http://www.overclockers.com.au . Use Arctic Silver thermal paste, it's expensive, but transfers heat three or four times better than generic goop. However, it's very nice to work with and looks cool, too. Get the "large area" type.

If your case doesn't have at least one 80mm intake fan and one exhaust fan of the same size, get them.

Prudent OCer's add no more than 10% to the spec Core Voltage. Your C400 can take 2.2 volts. The extra tenth of a volt may make all the difference. Good luck, and please keep us posted.

 

[birddog]

My old celeron 400 was not a good overclocker at all. other celeron speeds seem to clock better than the 400. You may want to consider selling is (you should be able to get $50 for it) & then buy a celeron 466 -533 (should be able to find one for @$80). Besides being faster, they clock better than the 400. I sold mine & picked up a new P3500e for $145 (for my #2 system)

 

[smithpd]

Thanks for the advice, all.

Birddog,
Where and how would you sell an old CPU? Just curious. In fact, I would probably give my wife the celeron 400 and sell her PII-233. Where could I sell THAT one?

 

[birddog]

I sold it th Heat23 on the Anandtech fs/ft forum. Put up a post & asking price in it if you want to sell. I use pricewatch.com to get an idea of what new ones are selling for & then take a % off. Also, if you do a search in the fs/ft forum for the item you have, you can see what others have been asking for theirs.