Overwhelming odds are that CPU won't work.  You can use any Core 2 Duo you want, except for the Extreme editions - the Core 2 Quad, no.

Hi ejn63, could you please explain why?

They are fully socket compatible. What is the reason it won't work? I could not find too much on this on the web, yet.

BTW do you know where can I find more info on Studio 1555's motherboard the 0C234M?

Thanks!

I also found the chipset in Dell Studio 1555 is Intel Cantiga PM45, that supports 1066FSB that is needed for Q9x00. Is it the BIOS that won't recognize?

Ok, a little more info: ark.intel.com/.../35515

This is where you can list the supported CPUs for PM45.

They are: QX9300, T9800, T9900, P9500, P9600, P9700, T9400, T9550, T9600, P8800, P8400, P8600, P8700, P7570, P6670, X9100, Q9100(!)

Checking their socket compatibility, they all use Socket P so they could be good candidates for upgrade.

What other parameters should be considered?

The only guide you really have is what Dell shipped with the system.  Since it was never shipped with EE or quad CPUs, chances are the system simply doesn't support them.

Can you please explain what other components of the MoBo should be checked and against what info? This is very interesting, I would love to understand.

Thanks

Well, I had the idea that some of the MoBo-CPU combinations were not shipped, because when those CPUs became affordable, (when they landed in a lower price range, so Dell could have put into a 1555), Dell already started to ship 1575 and the newer laptops, so instead of improving the 1555 constantly, they introduced new models. The same thing was with the Lenovo Thinkpad T60 - and years later people could put a Core 2 Duo processor to a relatively old computer with success, however it was not delivered with that CPU at its prime time. The fact they didn't shipped with it doesn't prove that it is technically not possible. Would be great to see a doc on the 0c234m motherboard - that would probably reveal the constraints on the CPU upgrade - if there is any besides the chipset and the socket.

Whatever documents there are for that system would be proprietary between Quanta Computer (its manufacturer) and Dell - if you're willing to take a chance, go for it - otherwise, stick to the same family of CPUs that shipped with the system.  Going outside that is very likely to produce a combination that won't work.

It's unlikely Quanta would ever have tested any CPUs other than those that it shipped when it built the systems for Dell.

Hi EJN63,

I am running my 1555 on T9900, no problems, although dell didn't advice me to do it, and they gave me a list with a few other cpus.

I tried QX9300 and it didn't post.

I haven't tried X9100 yet, but I am thinking to do it.

anyway,

I have Acer Aspire 2920 as well, it never came with X9000, and from Acer they gave me a list with very few compatible processors,

but guess what :) I am running X9000 on it, no problems.

So, if you can help me understand why X9100 won't run on Dell Studio 1555, probably you will save me a few hundreds? :)

Thank you in advance.

Thank you for your reply.

I am interested in robotics, especially humanoids as ASIMO of Honda.  

As Artificial Intelligence demands extremely fast computing.  

Even the dual processor won't be enough, I am thinking about Progressors, that may content hundreds or thousands of processors in it.

You know, the human brain has about 100 billion neurons, but today the CPU has about 2.5 billion transistors only.

And I personally think, that one neuron is not equal to one transistor but it is equal to one processor.

So, what do you think of that possibility?

The system board was never designed to handle the power requirements of that CPU.  Sometimes, you can upgrade;  more often, you can't. 

Since just about all consumer-level systems don't have removeable CPUs any longer, it's now a moot point - the processor is permanently soldered to the mainboard.

Hello! Does anyone know if it is possible to mount an Intel® Core™2 Quad Processor Q9100 on my Dell Studio 1555? Does the BIOS support it? And of course is the socket be compatible? Thank you!

I am running my Dell Studio 1555 on T9900, no problems.

I tried QX9300 and it didn't post.

I haven't tried X9100 nor Q9100 yet, but I guess they won't post either.

I was told by Dell that they won't work.

See my posts below as well.