2GHz is relatively slow when it comes to emulating an entire PC. It's not surprising that system can't handle >13000 cycles. You may be able to increase the speed by switching to the dynamic core, but not all games work with that setting. Increasing frameskip may also help.

"Protected mode" is a mode of operation of the CPU, first introduced in the 286, but not really usable until the 386. Its main advantage is allowing programs to access memory in a more efficient manner. If you're thinking that you can simply switch DOSBox into protected mode and that it will magically make programs run faster, you are mistaken because:
a) you can't
b) it won't

ok thanks for your reply
whats that thing with dynamic core, how to switch to that?

Either edit dosbox.conf and change the setting from "core=normal" to "core=dynamic" (in the [cpu] section) or, if you're using a frontend, it'll have a selection for this.

If you're using a recent CVS build (newer than the official version, which is 0.63), you can switch simply by typing "core dynamic" at the DOSBox prompt.

You may have a look at DOS/32a too.

Zorbid wrote:

You may have a look at DOS/32a too.

True, though I'd like to add that, just in case you (the TS) haven't heard of DOS/32a, more info is in this thread: [ANN]: DOS/32A v9.1.2 has been released

Good luck.