over clocking survey

you all want to doubt my reason.

And we're all correct, because your reasoning really is every bit as flawed as we guessed it had to be.

Right now you're behaving like the textbook figure who, when asked why they don't sharpen the utterly blunt saw they've been working so hard to fell trees with all day, answered: "I have no time to sharpen that saw because I'm already way behind on the number of trees I have to fell!"

My application will contain [lost of things...]

No, it won't, because the way you're going about it, there's zero chance you'll ever come anywhere close to completing that task.

So i need as much speed as i can get.

No. You need enough speed to do the job at hand. And that's way more than you can get --- from the chip you insist on, that is.

you all want to doubt my reason.

And we're all correct, because your reasoning really is every bit as flawed as we guessed it had to be.

Right now you're behaving like the textbook figure who, when asked why they don't sharpen the utterly blunt saw they've been working so hard to fell trees with all day, answered: "I have no time to sharpen that saw because I'm already way behind on the number of trees I have to fell!"

My application will contain [lost of things...]

No, it won't, because the way you're going about it, there's zero chance you'll ever come anywhere close to completing that task.

So i need as much speed as i can get.

No. You need enough speed to do the job at hand. And that's way more than you can get --- from the chip you insist on, that is.

Don't include me in the typically rediculous Bumhard generalisations.

Of course it is possible to do what you want with the chip you want. It may be slow and you may have to add more support hardware to achieve it. You may even find that your at89c51 ends up being the controller of a multi-processor configuration, but it could be done.

Now the question really is whether you are the best candidate for the operation. What do you think?

I rather suspect that speed will be the least of your problems:

The AT89C51 has only 4K Flash and 128 bytes RAM - you are certainly not going to be able to do all that stuff without external memory expansion!

Possibly not even with the full 64K expansions - so then you'd have to be messing about with banking.
The learning curve for banking is not trivial...

You'd avoid all of that (and save money) with an appropriate processor choice!

Or why not get a Raspberry Pi?
http://www.raspberrypi.org/

The big issue here. Do you want to build one or many devices?

If one - get a development board with ethernet hardware and a prototype area.

If many - get a development board with ethernet hardware and a prototype area. When you are happy: make custom circuit using that CPU.