Yes. Intel core 2 Duo is completely compatible with Windows vista Ultimate both 32bit and 64 bit
Yes.
Yes.
No.
yes ,the speed and processor will hold the conpassity.
Yes, it has 8086-compatible mode, if that's what you mean.
I have a Intel core duo 2,1 4 GB Vista Ultimate and a nvidia 9600 512 and haven't seen significant lag during my play through.
yes
The Intel Core 2 Duo uses 400, 533 or 800 Mhz bus speeds, depending on the type.
No. The chipset is too old, and there isn't even a way to physically install one.
Yes, it is compatible.
it is compatible with most computers but to be sure pull you old processor and see if the pins match.
Intel celeron is the lowest processor Intel offers. Below is the list from best to worst: Intel core i7 Intel core i5 Intel core 2 quad Intel core 2 duo Intel core 2 solo Intel pentium Intel celeron For laptops: Intel core i7 Intel core 2 extreme Intel core 2 quad Intel core 2 duo Intel centrino Intel pentium Intel celeron