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Oldie but a Goldie Question - Asus P2B

G

goobee

Platinum Member
Before I stick it in, does any know if the Asus P2B will accept a coppermine slot 1 processor? (voltage wise, that is) Both the manual and Asus' website is unclear to this respect.

Thanks.
 
Yeah it'll take a Coppermine.. might need a BIOS flash.. also, you may want to make sure of the CPU BUS frequency before you just go ahead and plug it in.. the board isn't rated to run @ 133 system BUS, but it will.. it's advised you get a 100MHz system BUS CPU for example a PIII 700E or 800E, anything ending in B or EB is a 133 CPU. 133 will work, but throws your AGP out of spec... so if you are going to be using an AGP card, and a 133 CPU, hopefully it's something in the GeForce family so that no problems will be had.. (They can handle high AGP speeds)

but to answer your basic question, yeah you can put a CuMine CPU in.. i'd make sure the BIOS is up to date first because if you put the CPU in with an old BIOS that won't support the CuMine, you won't be able to power it up to do the BIOS flash. you'd have to put the other CPU back in... just a word of caution 🙂

good luck!

 
Thanks, I'll boot it with a Celeron first. Oh, incidently, my board ver is 1.10 if that matters any. 🙂
 
Goobee....

The situation is a little bit more complex than Yield would lead you to believe. There have been several excellent threads in this forum which will answer your question in depth; I suggest you do a search for them.

I will say however, that depending on the revision of the P2B that you have, you have to be weary of which type of PIII you buy. I have a revision 1.02 Asus P2B, and the minimum cpu core voltage that it's able to supply is 1.8V. However, most PIII's request a voltage of 1.7 V (if I remember correctly). However, by getting a socketed form of the PIII (Coppermine), and using a slocket adaptor which allows me to manually select the voltage, I was able to select the voltage to 1.8 V. although this voltage is nominally greater than that "requested" by the processor, as long as you have good cooling, you'll be just fine.

If you try to use a Slot 1 processor in these early revision P2B's, they won't boot up (because they are "requesting" 1.7 V, and the mobo is only capable of providing 1.8 V minimum).

So, make sure to get a socketed Coppermine, and a slocket that allows you to manually select core voltage.

Previous posts, in particular by Andy Hui, should clear up any confusion.

I have a P2B running a PIII 700 overclocked at 933 (133 Mhz FSB) with absolutely no problems at all. IN my opinion, this is one of the best motherboards ever made; who'd guess that a motherboard purchased in 1998 can still provide such a high level of performance today!

Note, cooling is essential. I had the infrequent (yet still annoying) instances where I'd get blue screens, which completely went away only when I directed an additional fan at my cpu.

Good Luck.

Mko.
 
Thanks for the lead Mkoh, according to Andy, ver 1.12 and up are coppermine voltage capable. Rats, looks like I'll have to get another mobo for my processor.
 
I wouldn't give up quite yet. The P2B has such potential, and it would be a pity to let it sit idly....

Try it out first. Worst case scenario, it won't boot. I seem to remember reading that some rev. 1.10 P2B's might actually be able to output below 1.8 V.

Your other option, and this is more extreme, is to modify your processor so that it actually requests 1.8 V instead of 1.7. I believe that this might not only be possible, but easy.....

For example, I seem to remember reading (a long time ago), that if you "liquid paper" out one or more of the contacts on your processor, you can change the requested voltage. This was something that was done years ago, when people were trying to get their PII 300's (slot 1) overclocked to 450, using motherboards that didn't allow voltage manipulation.

I think that Toms Hardware might have some archived articles on this procedure (try searching for the keyword SL2W8). I believe that Firing Squad also had some articles on these types of mods.

If anyone else can offer some insight, it would be much appreciated.

Mko.
 
That's indeed one of the articles I was thinking of, but it doesn't give information in their table regarding the voltage setting that you need (1.8 V).

What I would do, is first try the Slot 1 PIII in your motherboard. If it doesn't work, than we can start thinking about alternatives.

There were other articles that offered more in depth information, but I couldn't find them using a quick search... I'm sure they still are around, but you might not even need to do any modifications. As I said before, I seem to remember some people having luck with revision 1.10 P2Bs.

Keep me updated!

Mko.
 
Some of the later revision 1.10 boards had a voltage regulator that could go down to 1.3v. Look for the following markings HIP6019BCB on the regulator. I had a revision 1.10 with the same regulator and was running a Celeron 566 in an Iwill slotket at 850Mhz at 1.5v (voltage adjusted at the slotket)
 
Man, it was tough but I was able to make out the regulator #, yes, it's a HIP6019BCB.

I guess the voltage is ok because it booted right up. I'm bench testing it on top of the box and it goes in and out of the bios fine.

Cool, I can put this sucker together now.

Thanks for the help guys. 😀
 
Glad it worked out for you.

The Asus P2B is amazing.

Mko.

P.S. Make sure you update your bios to the latest version (Beta Bios 1014 I think).
 
One of the, if not THE best board ever made... as already said running strong since 1998. In my case with P3-800 in a slocket adapter doing 960 MHz.. and in benchmarks it just completely smashes a P3-1000 on a i-815 board. I love it 🙂
 
This is great, according to the voltage monitor in the bios, vcore is at 1.7volts. Everything is peachy. 😀
 
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