The "GoodRAM" RAM is definitely ok because I was running on it before for a few years. I ran the memory test and there were no problems detected. I hope I still keep it inside...I am not sure If they are compatible...
I'd still remove it.
I completely disabled virtual memory in my system to keep my disks away from being busy with it. I want to focus on using RAM only.
Definitely don't do that. If you're short on hard drive space then by all means shrink the size of the pagefile, but don't disable it entirely. You'll run into trouble with software if you do.