dothan bsel0 to ground?

I just bought a dell inspiron 6000 with a pentium m 715 (100x15=1500mhz)

The chipset supports 533fsb (sonoma?), so I'd like to get my p-m715 up at p-m760 (133x15=2000mhz) speeds.

From what I've read, these dothans should be able to do around 2.5ghz on stock voltage, at least in desktop computers. So, 2.0 should be fine in a laptop with regards to power and heat

I've been looking at the tech spec pdf off intel's website and found that if I change the BSEL0 pin from high to low, it'll make the cpu run in 533fsb mode.

At least this has been how it was with all the older pentiums (3, 4, etc) desktop line.

But I also noticed a bclk. What is that? Do I need to do anything to that, or can I just manipulate the bsel0?


Bringing it to low, I could just yank out that pin, correct? I know that there are two Vss (ground) pins next to the bsel0 that I could ground with?

High (1) results from no connection. Low (0) results from a pin being connected to ground.

Yanking the pin results in no connection (of course). There are pull up resistors (or network) connected to the BSEL[0-1] pins. To bring a pin low, you need to connect it to ground. To bring a pin high, you have to isolate it or break it off. I generally use laquer or glue to isolate pins.

edit: your other question. BSEL is used on 915 chipsets and BCLK is used on 855 chipsets.

ahhh thanks

good info

so you can buy an 400 mhz dothan laptop (with 855 chipset?)pull the cpu out ground out a pin, and now you have a 533 fsb cpu?

sounds like he has a dell 6000 with the 915 chipset already, just not a 533 fsb on the chip

anyone fiddle with bsel on these guys? or will i be the first to do it tomorrow?

consider it done guys!

awesome.

Most impressive! I've got a 760 that already is running @533 FSB
but i'm quite impressed that with that result. Congrats!

any pics of the mod?

Wow! I'd be too scared to do that ^^
Nice job.

proves the pentium m 1.5 715 to be the best to get

it's 400fsb means easy to oc to 533fsb via pinmod

just get it with the i915 chipset (for example dell i6000)

and it overclocks to pentium m 2.0 760 and performs identically

hundreds less

Great Job.

Could you point me in the direction of the correct document so I can look it over.

If you could provide a how-to guide or something, I could try this with my 9300...

LOL! That's awesome. Now I want to do this with my Laptop! 855 doesn.t support 533 though does it?

Hmm, 18x100=1.8Ghz... 133x18=2394mhz... I'd probably have to lower the multiplier somehow. =/

wow i didnt know you could do this either, that is cool. I would like to try this on my 9300 also.

edit: ah, it might not be possible with such a high multiplier as mine though... i see...

Originally Posted by YellowPeril

wow i didnt know you could do this either, that is cool. I would like to try this on my 9300 also.

edit: ah, it might not be possible with such a high multiplier as mine though... i see...

it looks like youre already running on 533fsb. this trick will only work for those with a 400fsb dothan

Originally Posted by ziddey

it looks like youre already running on 533fsb. this trick will only work for those with a 400fsb dothan

ah i see... thanks

Think it will work with my 1.6GHZ 725?

I believe the 7x5 are 400Mhz FSB and 7x0 are 533Mhz FSB.

Easy way to find out, download CPU-Z and run it. Take a quick look and you'll know more than you ever wanted to know about your processor.

guide is up at http://www.ijib.com/phpbb/viewtopic.php?t=3


as for the 725, what chipset is it? if its 915, then id say it has a good chance at 2.13ghz. and if not, id be willing to put money on 2.0