Hello WGTR We do not test or support client operating systems on our servers. Windows 7 and 2008 R2 run off of the same kernel, so they are almost the same operating system.  I cannot say with certainty that you will not encounter issues, but it should work. To answer your other two inquiries: No, the R200 does not support dual CPU's.  It is a single CPU server. Yes, the R200 supports quad core CPU's.  Here is a link to the details page on the R200: [URL] Thanks
Ok, I am looking to purchase a Poweredge Server to use as a Shoutcast server. My budget is under $300. I am looking now at an R200.  I don't have a license for any Windows Server OS, but I do have both XP Pro and 7 Professional. After a little looking around on Google it seems that it will be not much trouble to get XP Pro working on an R200, but I see nothing clear on whether 7 will work.  Any idea if 7 will work on an R200? 
XP or 7 on an R200?