Problem with Sonar X1 (when theer is more than 2 GB RAM)

Welcome to the forum!

Maybe the other memory unit is broken or the pair is not matching?
Anyways, your OS can only use 3+ gigas of RAM.

There usually are problems of some kind with Creatives consumer level/gaming cards (Soundblasters). Some of them default to 48 kHz sample rate, which must be noted doing SONARs settings, and many of them don't have/work with ASIO drivers, which are the most recommended ones, but like you have done, many get by with ASIO4ALL.

Don't select the integrated soundcard for anything in SONAR.

Memory moduls are matched. I've tried with different (also matched) and same problem turns out... Works only when there is less than 2 GB (Example, 2x1GB works well). Also i've installed this Sound blaster on another PC, which have 1 GB RAM, and there is no problem.

The sound card you have is relatively old.  Probably most of your problems are with the old Soundblaster.  Best option is to get a separate audio recrording device -e.g. a two channel USB connected device and use that.  You will be much better off.  $150 or less and you get a USB device that is far superior to the old SoundBlaster.

I've extended  maxmem to 4GB in msconfig, and turn on some advanced adresing... BUT, problem realy was in ASIO4ALL driver... on MME drivers everything works without crashes, but problem is the latency.... How can this be solved on this card? On 20msec out works ok, not so much crackling, but under hand is not so quite good.... to slow response. What techniques do you use to speed up? Is there some software, virtual cables...? i dont know...

Interesting.

Try using ASIO4All over WDM - assuming WDM drivers exists for Creative/SoundBlaster.
 
If this works, I might try reinstalling my 2GB chip. 

Well - it is said several times.. Use another sound card!

You can mess around with drivers as much as you like. I think it won't help. An Sound Blaster is a great game card, but a terrible audio card (at least - the old ones are). The Sound Blaster is designed to give a good gaming environment using EAX effects. However - a "clean" output (no colouring, EAX or other gadgets) is something completely different.

Really - a relatively good sound card is not that expensive. Example: If you only can use USB you can use the M-Audio Fast track USB as a "bare-bone" cheap starters card. This card is most times bundled with ProTools Essential (as "production pack") for about $50. For internal cards the E-MU and ESI cards are relatively cheap and good. And there are a lot more if you shop around a bit...

Just take this advise - I am sure you won't regret it...

@JClosed: It's easy you to said that, but in country where i live, it is not the case. $50 isn't small price. For example, here Fast Track costs 120 euros. And it is a best offer... I'm not asking information for the new sound card, i'm asking information for this card. And this can be done. You will see that in next sentence..
@Bristol_Jonesey: I'm not understand exactly your slang, but i have a hint. So, while you've been amazed, i solved this problem with kx drivers and everything works fine. I'm not complainer, i'm a problem solver. Best regards.
Thanks JazzSinger, Fireberd and Kalle, and sorry for my mistakes in language.

Then I can only suggest it is a problem with the memory addressing hardware on that PC

 
That would be my guess...

I've never heard of kx-drivers before (took a quick look at their site now), but nice you got things working.

The problem with the missed MIDI-notes might be solved by raising the MIDI prepare buffer.
(MIDI buffers...prepare using).
This problem became very, very common after version 8.