Although I don't believe it is a basic hardware error it would be worth checking your RAM by running Memtest which you can download from here: http://www.memtest86.com/download.html Running this test will do no harm but will confirm if your RAM is OK.
This again, okay. Should i use all my 4 at once, or split it to 2 for each test?
Next check your HDD's especially your Samsung drive and see if there is a firmware update for them.
My HDDs are Hitachi HUA721050KLA330 and Samsung HD154UI and there is no firmware updates or whatsoever for them, you can check it by yourself.
Not knowing how you have installed your OS and other programmes it is hard to pinpoint what is going on but if you have files or programmes on the Samsung drive, which is a "Green" drive this could be the problem as they can lead to slow access times, as they spindown when not being used, which maybe what is happening in your case. If you installed Windows on to the Samsung HDD this could be the reason why everything hangs.
as they spindown when not being used, which maybe what is happening in your case.
I know about that. Ofc i have no programs or whatsoever on it. I use it to storage video, distributives and other tons of usefull stuff i need. And i know about spindown, and yes, it happens. I can see a two-three seconds lag afrer i addres to it, and i can hear, how it turns on and start working.
And yes, my lags are some kind of a same, but just a waaaaaay longer.
And yet again, i had those lags even with solo Hitachi installed, or solo old maxtor.
The next step would be to run DPC Latency Checker which you can download from here: http://www.thesycon.de/deu/latency_check.shtml to see if you can find the cause of the latency.
will do it soon.
Good news from aside: now i have basicly two AM3 PC's, actually, im so upset, im thinking about swapping all my parts on other motherboard, and if it will work well i will... i dunno even what to do than. =(