If i have a 1.8g dual-core cpu,and i use windows98,does windows only see 0.9g?(i know that windows98 can only use one core)

No, W98 will see a single 1.8GHz processor

what happens to the other core will that still work in games and stuff

No, it won't.

If i have a 1.8g dual-core cpu

You have 2 X 1,8g, not 2 X 0,9g

GL

If i have a 1.8g dual-core cpu

You have 2 X 1,8g, not 2 X 0,9g

GL

yeah?is it right like you said?

for example ,pentium e2160,1.8g.does that have two 1.8g core,or two 0.9g core?

learned a lot..noob here...

If i have a 1.8g dual-core cpu

You have 2 X 1,8g, not 2 X 0,9g

GL

yeah?is it right like you said?

for example ,pentium e2160,1.8g.does that have two 1.8g core,or two 0.9g core?

learned a lot..noob here...

No, he's incorrect.

All the cores on your CPU combined = 1.8ghz, another core doesn't double what it's rated for (2x1.8ghz would be a 3.8ghz CPU), that would only be true if you were running dual CPU.

I know you can't count that way. I just approximated, in a half-joking way.

He has two cores running at 1,8 GHz, and they are sharing some resources so it can't be said that it's equal to two processors of 1,8 G, but the horsepower surely isn't closer to two 0,9 G processors.

I wanted to say that both cores are running at 1,8 GHz.

Lesson: apples to apples, oranges to oranges.

GL