CPU upgrade A135-S4656

[gshv]

If BIOS supports dual-core, than you don't have to replace it with single core. Unfortunately, it's not possible to tell if the BIOS supports dual-core or not.

Maximum FSB frequency is limited by the chipset. If you have 945GML then it's 667 MHz, and the 940GML has maximum 533 MHz FSB.

Gennadiy

[gshv]

Here is BIOS for your laptop:

http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/download.jsp?ct=DL&soid=2249220&ref=EV

Version 1.20 of the BIOS fixed some issues with T2060, so dual-core CPUs are supported by your BIOS. Also, I found some references on the net that the T5200 will likely work in your laptop.

Gennadiy

[peddleagain]

OK in Everest it tells me the chipset is Mobile Intel Calistoga-GML i940/i943 Posting screenshot. I haven't looked at youi bios link yet but I have Pheonix V1.9 updated 1-12-09. It was done at Toshiba where they turned on my lojack and won't turn it off unless I pay them. Absolute tells me they cannot find my machine online.
Here's a partial shot of the chipset window in everest.

[peddleagain]

I saw some guy had gotten a T7200 or T7300 to work o a A135-S4666 or something like it but I think thats a completekly different mobo. I think he was on CPU world getting advice too.
Here's the page; http://www.cpu-world.com/forum/viewtopic.php?t=12837
It looks like the same chipset but I'm unsure of the mobo

[gshv]

According to Intel 945 chipset datasheet, 943/940GML supports only 533 FSB. The 940GML doesn't support dual-channel memory, so your chipset is 943GML. I have no idea if the datasheet is up to date or not. As I said T5200 and T2450 should work, and, if you decide to try processors with 667 MHz FSB then make sure you can return then if they don't work.

Gennadiy

[peddleagain]

Thank You
I'm still learning how to read this stuff. So I'm pretty slow.

Your help is much appreciated.

[peddleagain]

Here's the other half of the chipset info from Everest.
It says something about GMA 950
The Intel chipset info only has 940GML not 943GML info.

[peddleagain]

I found the data sheet and you are once again correct Sir.
I will look for a larger 533FSB cpu judt to see if it will make this thing faster.

[peddleagain]

I just found this page; http://ark.intel.com/chipset.aspx?familyID=24679 and the Celeron M450 seems like it would be faster with the 1M cache, 2Ghz, 533FSB

What do you think Gennadiy am I missing something?

[peddleagain]

I've figured it out the 450 has 32bit instruction set the 520-530 has 64 bit instruction set. That's the difference I found.

[peddleagain]

I looked at the T5200 core duo 1.6GHz L2 2MB 533FSB and T2450 core duo 2GHz L2 2MB 533FSB and its the same kind of difference, the T5200 has a 64 bit instruction and the T2450 has a 32 bit instruction.

Which one seems best to you?

I have a 32 bit system Vista Home Basic

[gshv]

I think the T2450 will be a bit faster than the T5200, but not much because the T5200 is based on more efficient microarhictecture.

Gennadiy

[peddleagain]

Thank You

[peddleagain]

I got the chip today. Here's a photo
I'll try to install it tomorrow.
Photo didn't post first time.
Second times the charm?

[peddleagain]

Just realized I don't have any Thermal Paste. Does anyone have a recomendation?
I'm guessing its six of one half a dozen of the other.
Nevermiond I went with Arctic Silver AA-1.75G R on New Egg 3 day delivery.

Expect a report about success or failure of the T2450 installation and bootup by 9-16-10

Thanks for the help Gennadiy