I have a pretty sweet system (I think anyways...) I have a Dell Studio XPS 9000 with an I7 965 Extreme Gamer Edition @3.2Ghz - its quad core with hyperthreading so it shows as 8 processors, 16gb high speed ram, 64 bit windows 7, and Sonar X1 64 bit. I use an older sound card but it's pretty awesome for it's time its called the Creative Soundblaster Elite. It's basically the only card they made for producing beats and such, 24 bit and 64 bit capability and a separate console for midi plugins and microphone guitar etc. So I been using Sonar for about 8 years or so starting with music creator, then sonar 2 then on up every year now im using X1 64 bit and have been since it came out. I love Sonar. I have it tattooed on me lol So my question is about ram and largeaddressaware. ive looked into it here and there but havent found a way to make Sonar the primary user of ram or to set an amount of ram accessible to Sonar. It still seems to use a couple gigs, not knowing it can pile up the hundreds of thousands of samples from all the plugins i have... it takes the speed with low buffers but still cuts out or skips sometimes when I have alot of synths running at once. I make beats. I use soft synths and midi piano roll to make beats, and while in the beginning I used to record every individual track to an audio wav, I've since become preferring to use each synth actively for each beat, running all the time and playing without mixed down wav tracks. And for the most part I'm successful, my machine kicks ass and pretty much can handle the high quality settings and speed I need to record quality 64bit audio in my studio. But for beat projects it does have a glitch here and there and I cant figure out how to mod it so it is like designated to use like 8 gigs ram on its own for example... I have plenty or ram available not being used. Sonar rarely uses more than 2 gigs. I know i'm missing something, there's a mod or a config setting or something i can do here to allocate memory to Sonar? Please advise

Ditch the Soundblaster and get a proper audio interface, designed specifically for DAW use

If the soundblaster works for your need..... Nothing wrong with that...

Well. To use more than the 2GB you can open sample based synthesizers... To test you can use more than 6 or 8 Gb I can imagine you'd like to test it's ability. Because in the end you wonder if the system is working like it should... Right?

Does your system have a second disk for audio recording? I assume you have...
http://i.dell.com/das/xa.ashx/global-site-design%20WEB/34fa81a1-9844-b563-9b06-622e9042fa94/1/OriginalPng?id=Dell/Product_Images/Dell_Client_Products/Desktops/Studio_Desktops/Studio_XPS_9000/hero/desktop-studio-xps-9000-left-right-hero-504x350.png

Now let's get to the bottom of this...

Just open a new project and add a synthesizer wich is samplebased. Let's say Rapture or Dimension Pro. 
Now open a big patch. Add now new tracks and add that same synthesizer. Now you will have two instrument tracks and two synthesizers. 

Let's allso open the system manager: CTRL ALT DEL. Now open the tab where you can see the memory in use. Now keep on adding new channels with new instances of this synthesizer and load the biggest multisamples in them you can find. You do not need to play the project. But now you can test how many instances you need to get more than 8 GB of ram in use...   Instruments like Omnisphere by Spectrasonics are THA BIG users... 

Hope this helps. Looks like you have an awesome system.  

First culprit I'd look at is your soundblaster, they are not really made for music production so you won't get low latency and no pops and cracks, they don't have good optimized ASIO drivers (If at all) and are made to play games and simple audio.

Second is your system is a gaming machine, they come with beefed up gfx cards  that are not always good to have in a DAW build.

Check if you have any problems using this:

http://www.thesycon.com/deu/latency_check.shtml

Large sample libraries like Omnisphere or Kontakt, orchestral libraries with many articulations etc.. are the plugs that will benefit from lots of ram, soft synths will use CPU and hardly any ram.

That system should not have any trouble playing back lots of soft synths and a ton of audio tracks, somethings wrong somewhere, I have a good hunch like Jonesey mentioned that it's the soundblaster card.

If you can swing it, the VS series (VS100 VS20) are great Cakewalk devices. The earlier Edirol FA66 maybe on sale somewhere... Allso very nice. If you want more upscale performance the VS700 system or somewhere in between, a RME device (very solid drivers too)...

The last SoundBlaster card I had was an ISA card. And I kicked that out of my system a long time ago. The ASIO drivers were not available then. And since then not much attention has been given to the musician by that company...

With the tool Kenneth provided you can very simply see what device in your system is high in latency...  Could be the SoundBlaster...

you are also running sonar 64 and not 32 bit version ;-)

You can't force SONAR to use X gigabytes of RAM. It will take what it needs. If you're using synthesizers, as opposed to samplers, it's quite likely SONAR will never need more than 2GB. The only situations where your vast amount of RAM might actually be fully utilized is with very large sample libraries or very large projects with many audio tracks.

The sound card, btw, is a non-issue. For your purposes, that old SoundBlaster should do just fine.

RAM usage is probably not related to your dropouts at low latency, either. Having more RAM can help with glitching only to the extent that you have fewer disk reads and thus save that overhead. However, disk reads typically aren't the primary cause of clicks, pops and dropouts. That's entirely a CPU-usage issue, and relates directly to buffer size.

Here's a thought. If you're creating your beats within the PRV, as opposed to playing them via a keyboard controller or drum trigger, then there is no need to have minimal latency. Simply bump it up until the interruptions go away.

omg u guys are so awesome - so i set it up to notify me when i got a response and since i got no notify i assumed noone liked me lol ok so maybe it's me being a noob... like i said i know systems and i know mine is bad ass although not in a gamer sense cause graphics arent important in my studio except for the ability to run 3 to 4 monitors in which case i had to ditch my long loved nvidia for ati cause the least expensive nvidia i could find that supported more than 2 monitors was around 400 bux and the ati 5750 was like 130ish i think... anywho. random tangent of nerd brain... sorry that happens sometimes. so like i started, maybe im being a noob cause in my projects i have like 8 to 10 synths with huge libraries and all running live at the same time with very rare dropouts. the latency setting is set for 2 buffers at 10 ms i think and i record 64 bit at 96000khz broadcast waves when i export. but playback is usually fine, i do have the occasional dropout like i just did which reminded me to check this lol and really my problem is i forget to save and forget to set autosave... im doing that now. but i just had read somewhere awhile back there was a largeaddressaware command or code or hack or something to tell ur computer that this particular program get a devoted x amount of ram. with 16 gigs i can spare alot it rarely goes about 5 unless im dloading alot, i just thought there was a mod, that would rule. i would like to get an m box or that cakewalk box i saw a while back, that would rule too, just havent had the cash to upgrade yet. and though i rarely have problems, i thought id check. i also run the mic from the booth in through an maudio firewire solo preamp, but i use the soundblaster elite for everything else. u guys some cool responses. so i tried the latency thing and it just went on for like half hour but never got abover the 500 mark although it said it was testing to 1000. yet, i have no idea how to read that thing. it said the machine should be able to stream audio and video with no problems if thats what we're looking for there. I also dont use the ASIO on my soundcard, i use WDDM i believe its called? I sometimes have crashes when i delete a synth or effect thats not being used like guitar rig 4 or battery, and sometimes the sound just stops and i have to reopen sonar and it works again. I've been trying to pinpoint the source of these annoyances but other than a querky guitar rig and battery im lost... i typically use 2 or 3 kontakt synths for differnt banks i have and then a string or garritan orchestra, and most my projects have zeta and dimension as well, then i used various different piano synths depending on the song. so it's like hip hoppish orchestra with technoish synths mixed in... usually. so... theres no mod? like i was thinking in the settings part where it says u can edit the sonar config file maybe it could be done there... i want it to have like the full potential of my system when it's running and theres so much extra ram with 16 gigs... im repeating myself... thank you for all your help so far by the way u guys are awesome. i love sonar. i even have it tattooed on my arm lol

Do you have your WIFI and Antivirus running when this is occuring?
As far as the sound dropping off completely, I know in X1 I can make it do it if I have something as simple as one of the Linear Phase Plugs installed and try to adjust with the transport moving or mess with the ProChannel when the transport is moving.  It will kill sound all together, meters will be bouncing, just no output to my Fast Track Ultra-I think this was identified as a bug at one time.
Fix for that is to close X1 and reopen.

Your system should be plenty to run anything you want in X1, Like suggested above Id just try to catch what is spiking it in task manager or a Latency Checker and kill that process and see what happens

What browser are you using?

Try adding multiple line feeds to separate paragraphs. Way tiring attempting to read the one long sentence.