Focusrite drivers WIN 10 Sonar Platinum

Just throwing this out there to see if anyone has had a similar problem:   I’m a low end user who, for several years used a Tascam US2000 into Sonar platinum pro.    I am using a quad core AMD machine running windows 10
 
The interface was quite adequate when mixing, but would start to break up a little on songs  with more than 16 tracks, or with  a lot of effects, even though CPU, disk and memory usage were all below 50%.  That wasn’t too much of a problem, as it could be solved simply by increasing the buffer size on the Tascam.  However,  I didn’t like the mic preamps much( noisy) and eventually relegated the US 2000 to a friend’s studio.
 
I was thinking of purchasing a larger Focusrite, but bought a 2i2 as an initial test.  The mic pre-amps sound much better and it works great with single vst instruents and a small number of tracks   However the 2i2 breaks up with some very obnoxious clicking whenever I approach 14- 16 tracks, and  this cannot be prevented by increasing the buffer size.   In case the machine was inadequate, I traded it on a 3^rd gen i7 machine,  running Sonar platinum.  The problem was every bit as bad. It is essentially useless at the moment
 
 I am in contact with Focusrite, but the response hasn’t been encouraging so far  “try our latest drivers….that didn’t fix it?  Well … Windows is not very good at handling audio…..   try this long list of things that involve completely removing all other functionality from the machine.”
 
I’m not against the idea that a music computed shouldn’t  be doing other things, but I am annoyed that the Tascam, and EVEN A BEHRINGER UCA222 will work under circumstances where  the Focusrite won’t.
Anyone had any experiences with this?   Were Focusrite able to pinpoint the problem, or am I in for a month of  wasted effort changing system parameters? 

I use a first generation 2i4 running the latest drivers and don't have the problems you're describing

Using a Pro 40 here! I've mostly always used Focusrite audio interfaces and found them to be many times better than most others. I do always manage my projects efficiently though, by freezing tracks and doing all the recorded stuff first before ramping up the buffer for mixing. Many of my projects have 24 or more tracks including vst instruments such as Reaktor, Kontact loaded, Play loaded etc. and this is an AMD powered machine.

cparmerlee
 
So I don't know.  Is there anybody who makes an audio i/f that has really good preamps at an affordable price, together with good, stable software?

MOTU

I had similar problems then, after reading some advice online, asked Focusrite for their latest beta driver. That has fixed my issues. May be worth asking!  

For Focusrite to turn round and say "Windows is not very good at handling audio" is really disingenuous!
 
I've been running their interfaces for the last decade without issue.
 
I know this doesn't help you but I am dumbstruck that they should make that sort of comment!
 
I bet it wasn't from their marketing team.......
 

The Tascam 2000 is the same unit as my us1641. There is no noticeable difference between my Scarlett 6i6 and the Tascam drivers and I'll also say pre amps. I actually find the Tascam Pre's are more forgiving when you have peaks in a live recording. I don't like the Focusrite pres much at all. My Tascam pres are certainly not noisy. 
So anyhow, you seemed to have traded apples for apples. And you issues are obviously to be found in your computer. 

Scarlett 2nd gen 6i6 and SONAR Platinum running on a stock Windows 10 HP PC with 8 GB RAM: absolutely rock solid since I bought the PC a year ago.
 
Hope I haven't just jinxed myself.

+1 to checking LatencyMon. If you could run that and give us some insight on the offenders (each tab allows you to sort by column), that will give us better insight into your system. You only need to run for a few minutes while working, but can let it run longer if desired (but it does add latency on its own too).

I just got a Focusrite 2i2. Been using a M-audio Fastrack for 10 years. Thought maybe a new 2i2 would be an upgrade. When I use a lot of my older Instruments like East West Instruments, I get very bad popping. When I hook up the old M-Audio they work fine. I'm using Sonar Professional that I had just purchased. I decided to reinstall Sonar 8.5 again 32-bit to see if there was any difference and the 2i2 works great. So it seems that the Focusrite doesn't like 64-bit. I got 1 reply from Focusrite when I contacted them which was no help. When I replied with more info that they said I would need, I was ignored. Guess I'm using my old m-audio and out the money.