I was not paying any great attention to your thread after it seemed your situation was better after moving the mouse and keyboard "receivers". I say "receivers" since I think I understand you to have two wireless keyboards and mice hooked to the 'same' mobo. One wireless keyboard and mouse goes to a Host operating system and the other wireless keyboard and mouse works with a Virtual Machine. The Host has a monitor or the TV and of course whichever way that is the VM has the other video display.
Now since that is the way it seems you have your configuration setup and use it with one user on the VM and other user AT the 'same' time using the VM, I searched for something about Host and VM use. The link I found seems older but the caveats it brought to my attention were pretty revealing. There is far more to using Host and VM than meets the eye at first glance. There seem a number of issues that may need attending to in software or general setup.
Troubleshooting Performance Issues
General Performance Issues
My virtual machine is extremely slow.
After reading thru that link above, I am now aware that VMs are not without some possible issues for the Host machine and vice versa. After moving of the "receivers" and I say "receivers" since I assume you are using two receivers and at first you said your reason for the original post seemed better, I was pretty sure you had nothing we could help you with in the CPU Forum Section.
After going over the reason for thread and first post and seeming cure, now you are back again about the VM, I guess being slow, it comes to mind that what you are doing is software related or just flat out not enough computing power to do what you seek to do. By computing power, it could be not enough ram. It could be not enough video power for two greatly different size viewers of video. It could be not enough dedicated cpu cycles to run the emulated network system of the VM.
I have run VMware before. I used it or the Host in my dealings. Not both the Host and VM machine concurretly. Not really. I know after reading that information in the link above that this VM thing is not simple. And highly unlikely to be simple with two make that four inputs from users at the same time.
I wonder if we are all chasing our tails in a circles with the situation as described in an AMD Cpu forum section when maybe some VM gurus would maybe more likely to have an answer. At least that is what I am beginning to wonder. Host and VM both having to display net data at the same time is now what the issue seems to be, if I have heard the symptoms correctly. That could be almost anything VM related or how multiple "receivers" maybe acting when needing processing to hand off to the VM.
I am no VM guru. NOT by any means. And when I think of that I see many trails that have nothing to do with hardware. But then I realize the architecture of the FX processors are different than they used to be in that there is "A" shared FPU unit for each core. That might contribute to an issue. Well I am 'guessing'. Perhaps there is something being put some what off with the FX-8150 not being on a true 9xx chipset motherboard? I am not sure anyone can know. Remember I am doing some guessing 'after' reading the link above and realizing in my mind just how much there is to be out whack with a VM and the Host machine.
You might more quickly or make that 'even' find an answer in a forum dealing with the exact VM you are now using since VM is generic with the many VMs that are now out there. Just a thought after some research.
RGone...