How to choose the right processor speed for application

[ITA]

Hi,

Can any one help me to identify the right cRIO model.

I want to choose the cRIO processor for an application. The cRIO- 9025, has processor of 800 MHz speed. Where as there is another cRIO model which comes with 400 MHz of the processor.

How do I decide which model to choose?

The mathematical calculations will help me to reach at a conclusion. I am not sure how to go ahead with the mathematical calculations.

Can any one advise me on this.

ThanX

[dkfire]

I don't think you will get any mathematical calculations telling you witch cRIO you have to use based on the level of information you have given.

I don't think there are any mathematical calculations to decide witch cRIO a user can use. 

You need to give a lot more information about what you are going to use cRIO for, before anyone can give you an advice.

What does you setup look like ?

Wwitch modules are going in the cRIO ?

What are they doing ( input/output )?

Are the cRIO interacting witch external systems?

Are the cRIO only collecting data ? How fast ?

What operation are the cRIO going to do ?

Just a fewe of the questions you need to ask yourself. 

[nathand]

There's no good way to know, except with some experience.  If you know you're going to buy one of those two systems, ask your local NI rep if you can borrow one for a week or two for some testing.  If you can borrow the lower-speed one and it can handle your needs then you know you're all set; if not, get the faster one.  If you can borrow the faster one and the processor is barely loaded, the slower one will probably work.