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Will Upgrading My Notebook CPU work?

K

KurskKnyaz

Senior member
This girl I know was about to throw out her Toshiba Satellite A105-S2071 because it was broken but before she did that she asked me if I needed parts. I did.

Basically the only problem with it is a broken LCD and it only has 512MB of 533MHz DDR2 RAM. I ordered a new LCD and 2GB of RAM for a total of $87.

The CPU is a Celeron M 1.7GHz on (socket 479). I want to upgrade the CPU as well. I already learned that Pentium 4 M CPUs are designed for socket 478 and won't work (but correct me if I'm wrong. The Current CPU is running at 1.7GHz on a 400MHz quad-pumped FSB which means that the multiplier is at x17. CPUID tells me that my motherboard is an ATI SB450 but I can't find any literature on it.

These are my questions:

1. Can I just pop in any socket 479 Pentium M and have it operate.

2. What if the CPU runs on a 533MHz FSB but on a lower multiplier. Will my motherboard set the appropriate multiplier to get the stock frequency or are the Pentium M CPUs multiplier locked.

3. Is my motherboard even capable of automatically selecting the right FSB or is it just stuck at 400MHz. Say I was to get the Pentium M 770 which runs at 2.13GHz on a 533MHz FSB and a x16 multiplier. As you can imagine the laptop is not made by Asus and so my BIOS are stripped of any significant options. Will the motherboard run the FSB at 400MHHz or 533MHz

4. If the above works. Will my notebook be able to withstand the extra heat generated by the faster CPU. The notebook is designed to run a 1.7GHZ Celeron M, I will be running a 2.13Ghz Pentium M 770. the two CPUs do have the same Thermal Design Power at 27W (whatever that means).

5. I my CPU soldered onto my motherboard?

6. I it worth putting in $100 of parts into this notebook. I plan to sell it later.

Thank you for your help!

UPDATE:

I popped in a Pentium M 770 and the motherboard automatically set the FSB and it worked properly.
 
First off the pentium M and the P4M are not socket compatible. As far as the investment. I wonder how much you are expecting to get out of selling it? If for a 87 dollar investment you can turn around and sell it for 200 then go right ahead. The pentium m even at 1.7 is quite capable of doing most tasks. the cost of trying to upgrade the cpu at this point is not worth it imo.
 
I took the laptop apart and put it back together so I answered most of my questions. I only have one left: If I pop in a 533MHz FSB CPU will the bios automatically set it to 533 given that i have no options to change the FSB and that the current CPU is running at 400MHz?
 
First thing you need to do is some research to see what the availible CPU options for that model where. Chances are that the main board bios is locked to only accept those CPU options that where availible. So poping in a CPU that is faster then one of the options will either not work or the CPU will be forced to operate at the speed of the fastest CPU it was designed to hold. Laptops are very limited in there BIOS options and for the most part are locked into using the CPU they come with and thats it.
 
I know that the motherboard supports Socket 479 Pentium M CPUs. I currently have a Celeron M 390 running at 1.7GHz and a 400MHz FSB. I want to get a Pentium M 760. It differs from my CPU only in that it has a 2.0GHz clock speed, 2MB of cache, has a 15X multiplier, and a 533MHZ FSB. Manufactures usually use the same motherboards in similar models. Most new BIOSs automatically detect the CPU and the appropriate FSB. I hoping that I can just pop this one in and it will run lite it is intended to. But if anyone has done this before I would like to hear your results.
 
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