Restoring stock speeds on a FSB downclocked CPU, possible?

Hey!

First of all i would like to thank you all, thanks to the incredible amount of info around, i was able to do the impossible, and put a 1066mhz FSB CPU on my good 7 years old Dell Vostro 1500 that has a PM965 chipset.

I was't completely sure if the BIOS would recognize it, if i would succeed setting the wire or if i would somehow fry the CPU, the MOBO and be left without a computer for a while.

So i had a T7250 @ 2.20Ghz (using ThrottleStop w/Dual IDA) 1.1250v 800Mhz FSB , and got a T9400, yesterday i installed it and did the BSEL mod posted in the forum to lower the FSB from 266Mhz to 200Mhz, after turning the computer on it didn't boot, however after resetting the RAM the computer booted!, i went into the BIOS and the CPU was recognized just fine.

So now, after getting some nice sleep, i am doing some tests and stuff,
i have my CPU clocked at 2.0Ghz right now (it would run at 1.9Ghz if not for ThrottleStop Dual IDA), and then i suddenly realized that umm... it never came to my mind that doing the BSEL mod would allow a 1066Mhz processor to run in a 800Mhz MoBo... at lower clock speeds...

So, have i just got an upgrade that could make my laptop actually slower?, or am i missing something?

Thanks for the help.

 

To get it to run at 266mhz FSB, you now need to perform a PLL pin mod.

Otherwise sell the T9400 and buy an X9100.

Though I bet your new T9400 is much cooler than the t7250.

 

Haha yeah it is, it runs around 30c when idle and around 60c when stressed by ORTHOS, a lot of difference compared to my T7250 which used to hit around 74c.

Also even when running at 2Ghz it outperforms my older CPU, (guess the 6MB cache has something to do about it)

So i was reading your thread "PLL Pinmod Overclocking Methods and Examples", honestly i do not know about electronics, but i am reading about the procedure , and i would like to give it a try after i gather enough information, is this basically the way it should look after the job is done? >>

Well thank you all for the help, i am really happy i was able to put a newer CPU on my laptop and breath some new life on it.

 

You don't necessarily need to do that. You can just try setFSB or his tool called setPLL. Though it does help to do a hardware mod on the actual motherboard so your CPU might have a chance of speeding up your boot time, and you don't have to mess with it every time you boot up etc.

Although I seem to remember something that you could integrate into the grub2 bootloader (a bootloader thats made for linux but can boot windows) that would overclock your FSB before your OS even boots.

It all depends on your laptop PLL, some simply can't be overclocked with software, and also depends on whether your more of a hardware or software guy. Either way, there's no easy way to do it. (unless you're moral_hazard of course in which case it comes naturally)

 

Haha yeah, you know?, most of the people that know me thinks i am some kind of tech genius because i know a few tricks here and there, to the point of running to me for help when they have problems, which is cool as i like to help others, but i know... you guys are the true computer geniuses.

I tried setFSB without success (i just tried all the PLLs on the list ), however i could not try setPLL because is set to private, perhaps i have to ask for permission.

According to some user Dell Vostro 1500 PLL is SLG8LP550V however i would like to verify this (i will open my laptop again anyway, my GPU hits 78c when busy after applying Artic Silver 5, i probably did it wrong), and then get setPLL to program the PLL yay!.

Is the general idea to program the PLL to run the FSB at 266mhz? or change a byte to unlock the PLL then use another program to increase the FSB speed?

I am after all more of a software guy... not that it means i am an expert or something like that, however if it can be done via software ill try it that way first.

Thanks for the advice people.