Inspiron 1525 successful overclock

Update 10-20-11: An easier TME-unlock based on the schematic is to simply disconnect the R374 pull-up resistor so the R373 pull-down resistor will set TME=0 (unlocked). Just need an owner to find where on the systemboard the R374 resistor is.




Reported here by FieroGT. Overclocked T7250-2.0 to 2.5Ghz with more reports to come.

How to pinmod the PLL to disable TME (trusted Mode Enabled)

ICS 9LPRS365BKL Pin 11 (TME/PCI2) above (11th down from the top left) is required to be cut from track, then routed to a GND point via 10k resistor to disable TME (trusted mode enabled) to allow setfsb overclocking.

 

is all this effort even worth it

 

FieroGT has a 2.0->2.5Ghz overclock. 25% more performance simply by cutting a track from pin 11 and soldering that track to GND via a 10k resistor to allow setfsb overclocking. I know a T7300 overclocked at 2.62Ghz levels gives cpumark values in the same range as a P8400. So let's see what "older" gear can do:

- Overclock as above -> increase CPU performance.
- DIY ViDock -> increase IGP performance by 10 times or more
- SSD in primary bay, HDD in optical bay -> increase HDD performance

The hardware purchased above can be transferred onto new gear later down the track. So does the overclock form the basis for an overall system overhaul? I guess the readership can be the judge of that. Though here it would be an "advanced" user doing such an overclock.

 

Quote:
Originally Posted by sa17dk

is all this effort even worth it

Quote:
Originally Posted by nando4

FieroGT has a 2.0->2.5Ghz overclock. 25% more performance simply by cutting a track from pin 11 and soldering that track to GND via a 10k resistor to allow setfsb overclocking. I know a T7300 overclocked at 2.62Ghz levels gives cpumark values in the same range as a P8400.


yup, i couldnt have said it better myself! i am very happy with the results!
and if any1 has any questions, or needs any more info, i'd be happy to help.

 

Hey FieroGT, I am looking into overclocking my Dell xps 1530m. I will look for the PLL chip tonight, but since we both have dells I am thinking there is a good chance we have the same PLL chip. Do you have any pictures of your board after the mod?

 

Fiero, got your pm, heres a pic of my PLL, its the same as yours.

Any suggestions on tools/methods used are welcome as well.

 

Use a very small tip on your soldering iron.
Take your time.

You might want to use a magnifying glass.

 

nando4, I can't see the picture..
can you please re-upload to another image hosting?
Thank You!

 

FieroGT posted the pic and I just linked it. Unfortunately the picture link no longer exists.

 

oic, I'd like to see the before and after pics for Inspirons.. Thanks nando4!

FieroGT, you've got a PM Thanks in advanced!

 

I also have a Dell Inpiron 1525, but my processor is the
Intel Pentium Dual Cpu T2370 @ 1.73GHz. Do you think it would be possible for me to overclock my cpu as well?

 

yes in the same way.

 

fiero, im pretty comfortable with cutting the pin and soldering, but im not sure what type of 10k resistor to solder to pin 11. do i just ask for any small 10k resistor from radio shack and solder 1 end of that to the pin?

 

Sorry for bring this back up, but where will I find the PLL Chip? Would I have to open the whole laptop up?

 

Anyone? =/

 

I want to overclock mine, 1525, help me to do it. not sure how to do it.

 

@ FieroGT, you have the ICS9LPRS365BKL
can you set 266fsb so I can see the registers ? please setfsb for a few values like 200/233/240/250/266/maybe more?[stability is a later purpose, not now] and make captures for every one using Diagnostics tab with your normal selection [ICS9LPRS365BGLF?] I want to study the registers for helping abo/others with 365BKL [I did the TME unlock, however I can't use SetFSB because it freezes, so I need to do this manually]
solved and posted on main topic

 

hi FieroGT , moral hazard and nando4

I have a dell 1525 notebookwith Intel Pentium Dual T2390 1.87ghz , Intel Crestline GM965 chipset , Intel GMA X3100 socket 479.
I recently upgraded my CPU to T8300 and it had 4gb ram with Hdd 7200rpm.
I try to go in bios and disable speed step and used ThrottleStop to do some tweaks and got it to run at 2.6 GHZ (8% more). I was wondering if i can still apply pinmod the PLL to disable TME to make it run better? I have the same chip as it's showing by FieroGT .
ICS 9LPRS365BKL Pin 11 (TME/PCI2) above (11th down from the top left) is required to be cut from track, then routed to a GND point via 10k resistor to disable TME (trusted mode enabled) to allow setfsb overclocking.

Let me clarify this, after cutting pin # 11th down from the top left , then routed to a GND point via 10k resistor to the chip side or the board side where it was cut?
From my understanding is to the chip right?

Thanks

 

Yes, the chip side is right.

 

Thanks moral hazard for your quick response.

 

I might add one thing, to do this mod you wouldn't really need to cut anything IMO.

As long as you connect the TME pin to GND with a resistor it should work fine.

If it doesn't disable TME, maybe use a 2k resistor or something smaller.

Safer than cutting pins/tracks (I think).

 

Thanks again moral hazard for your advise. I will try your way and if it doesn't work i'll try a 2k or 5k resistor. How do i know if it doesn't work or not? What size of wire do i need to do this PLL pinmod ?

 

Hi moral hazard,
I just took a peek at the chip in my dell 1525. It's in the same location as FieroGT"s chip but it has the different numbers on it , here's the number
ISL6262
ACRZ
B0828BF QX

from google i come up with this link
isl6262 pdf datasheet and application note, data sheet, circuit, pdf, cross reference, pinout | Datasheet Archive

take a look and see if i can still go on with this pinmod pll . I need help with this mod.

thanks

 

It looks like that chip is not a PLL, it's a voltage regulator:
http://www.intersil.com/data/fn/fn9199.pdf

 

okay, let me keep on looking for the PLL and report back. From the look in the picture, it look like the same chip that i have but it has the different number on it. i tried to look around cpu and the ram area but no luck so far.Any hint on finding this chip's location?

 

I don't know the location, but here is another photo:
http://forum.notebookreview.com/att...-pinmod-overclocking-methods-examples-1aa.jpg

 

Hi moral hazard,
sorry it took so long to respond. I had problems with my dell 1525, tried to take the laptop apart and it seem like my key board connection pins were damaged and i just got it back to working condition again and wrapped it up and not to tried to look for my PLL chip for now. i didn't want the key board to stop working from trying to look for the PLL chip. Maybe if i know exactly where to look for it , then it is ok to proceed with the mod. Thank you for your help.

 

hmm overclocking a dell?

i wonder if this would work on my old d820.

 

After all this, its gonna looks like that? Imageshack - img0127wj1.jpg Can i do the same, use bolt as the GND point?

 

I have a Dell inspiron 1520, with mobile intel 965 express chipset, CPU: Intel T7250 2.0 GHz and 1 GB (2*512MB) RAM.

I am wondering if this mod will work on my 1520

 

Hi,

I realize that this is a very old thread! But I couldn't help but post to find an easier way than soldering pin 11. I have located resistors R374 and R373 which is covered by plastic just under the WAN card. But I'm a little confused as to the exact locations of these components. I'm not sure if R374 is there or not? I have attached a photo for your viewing.

 

Anyone please ??