Theoretically your problems could be happening if your temps are higher than you indicated or you're right on the cusp of having power issues. If your temps were on the verge of throttling with HT disabled, there might be minor throttling with HT enabled. Likewise, if your voltages were just barely enough with HT disabled, they might be slightly not enough with HT enabled. But to be on either of those cusps would be pretty rare. I still think it's probably software. (But I could be wrong.)
You
did actually reinstall Windows from scratch after you installed the new processor, right? Because Windows needs to install the multi-processor HAL to use HT. To check, run
devmgmt.msc and open the Computer heading. If it says Uniprocessor, that's your problem. If it says Multiprocessor, then you're right.
And its seems to work faster without the HTT
Well yeah. If you're not multi-tasking or multi-threading, then yeah. HT splits the resources of the CPU so that it can handle multiple tasks more fluidly. If you're not giving the CPU multiple tasks to perform, then you're just splitting those resources for ... nothing. Generally this performance difference is unnoticeably small however.
Likewise, if you're running a lot of simultaneous processes, then you can also see a slowdown. This is because HT splits the CPU to handle these processes relatively equally, so you're not dedicating a ton of resources to a single thread anymore. Other softwares might be trying to take advantage of thinking that they have more free processing power to work with than is actually the case, thereby slowing down what you're running.
But either way, HT is for multi-threading. If you don't do much (or any) multi-threading, then HT is pretty unhelpful.
i'm wonder why I pay extra for P4 630 because its not a big diference in comparation with 335j.
Only you can answer
that question. Why
did you buy the P4 630?
I could be a problem with the processor(mabe just me i have this problem) should i go for warranty?
It's
possible. You could certainly call tech support and ask them what they think.