That's very true for track freezes, but freezing the synth removes the synth from RAM and prevents all CPU calls to it. Could be important for heavy duty synths - Kontakt, BFD, Omnisphere etc

A different approach may be in order. Try using a mic recording your amp and use a stomp box with DSP.  

Guys like i said i have already tried bypaasing the effects on the second track on first track im playing guitar plus 1 pedal vst 1 vst amp 1 vst cabinet with 4 impulses and 1 reverb and eq when i build the second track 1 VST IS AS FAR as i go witbout lagg ... i want to record myself for now ... after time when i have the money to build a studio it will be different thing my price top is 450 Us but im in Bulgaria prices are different here however i am orientated in bying a pc not laptop couse its always better alreasy have a 40 monitor as foe using mike i can do that but my amp is not ready yet ... Just give me if possible please pc parameters for good to great performance that will be great for now and i will keep trying bypass

1. A good low latency soundcard with ASIO drivers and a high Z input for your guitar.
2. The Intel 3770 quadcore I7 is at a very sweet value for money spot - great performance and not ridiculously expensive.
3. Get a 64 bit OS and at least 8GB of RAM, if possible do it so you have two RAM slots free for later upgrades.
4. A dedicated SSD of about 120 GB for your OS and host DAW is nice as it will really speed up boot time and system responsiveness. It's not exactly required though.
5. Get at least a 7200RPM HD for audio recordings and sample collections etc. Much better would be to get one regular HD dedicated for audio recording and another drive (SSD) for your sample collections and VSTs.
6. Video cards don't really matter that much but don't crap out with the very cheapest. Dual outputs are almost standard but you can also get triple if you like. As a rule of thumb, NVidia based cards run a little cooler than ATI ones, which means less noise from any cooling and longer component life.

VuL4o
Guys like i said i have already tried bypaasing the effects on the second track on first track im playing guitar plus 1 pedal vst 1 vst amp 1 vst cabinet with 4 impulses and 1 reverb and eq when i build the second track 1 VST IS AS FAR as i go witbout lagg ... i want to record myself for now ...

 
 Did you try freezing or bouncing? You've only mentioned trying bypassing. OTOH, if you have only two tracks, first with FX disabled, your PC should be able to handle it.
 
Also there are VSTs that can be very problematic on some systems. My system, for example, can't tolerate Melda Harmonizer at all. Are you perhaps using Perfect Space as the reverb? That alone could be the problem. You shouldn't use it when tracking, if you're short of horse power. Also, I don't know if it's "normal" to use 4 cabinet impulses at the same time (I did not know it's possible).
 
Then again, do you bypass clicking the bypass button in the VST? AFAIK that doesn't free any RAM, you need to bypass the FX bin (I'm not 100% sure I remember this correctly).

I use 4 cabs for guitar i plan on using 2 at left and 2 right for fuller sound but even if that is the case i must add bass drums and 2 for vocals and if i only add one more it crashes i use all sonar plug ins bit on both sonar and reaper same thing i think i need atleast i5 processor

I said this before, but why can't you use a simpler setup during tracking, e.g. a simple Guitar Rig or TH2 preset that sounds somewhat close to what you need, then switch to the big chain and click freeze.

Because guitar rig and amplitube are heavyer than simple amps sounf bad and are slower and more latenced and i know how to bypass not sure if i know about freeze is there an article about freezing and if i push freeze what happens to the frezed channel is it muted

VuL4o
not sure if i know about freeze is there an article about freezing and if i push freeze what happens to the frezed channel is it muted

No need for special articles, just study the manual and tutorials.

As far as i see bouncing es realtime mixing but muting the original tracks and adding 1 new track with the mixed so far product and you continue to work on top of it with additional tracks, i used to do the same thing have drum and guitars or bass mixed then add few more instruments ,,, but isnt that incorrect to the entire mix ?