Dual processor vs Single?

Hi dual processor systems do not give you twice the performance of the single devices also it will only boost performance with a dual processor OS like NT etc and the software that you are using even then you will never reach the eqivelent of twice the processors probaly about 75%.

Rich

Ouch!!!
This is a very difficult question.
The first determining factor is the software.
If the software is optimized for dual processors the answer is usually yes.
But, it depends on the program being run.
If the program uses a lot of vexctor graphics, there is no contest, the dual is far better, because of the two Math Coprocessors present in the PC.
(By the way the best processor for vector graphics, is the AMD Athlon XP .)
If it is a database, the situation is reversed. Use a single processor.
There is not enough room here to give a proper answer to this, but I hope I have given you at least a starting point.
There is a lot of information on the Web about this. Everybody from ZDNET.COM to TOMSHARDWARE.COM discuss this issue, with varying opinions.
I wish you good luck on your choice, and if you need a dual processor board, don't forget to checkout the TYAN dual motherboards. (Both AMD and Intel)
Regards, Chris