Hi All,
I'm running Windows 2008 Server 64 bit Standard Edition on the following hardware:
Dell Precision T5400
1 x Xeon 5450 Quad Core @ 3Ghz
12 Gb ECC Quad Channel Memory
Nvidia GeForce 8800 GTS 512Mb (MSI NX8800GTS)
2 X 73Gb 15000RPM SAS Drives attached to PERC 6/I SAS Controller
The drivers (with the exception of the NVidia card, it's running the latest vista 64 bit drivers from nvidia's website) are all the ones that Windows detected and installed. There are no

's next to any devices in device manager which I thought was quite cool for a first time around install.
I've followed all of the steps described here and elsewhere regarding configuring Windows 2008 Server as a work station. One problem I'm facing is that when there is some (background?) I/O taking place, explorer gets a bit 'laggy', my mouse pointer moves in fits and starts and any tunes playing in media player or foobar 2000 get broken up.
It only lasts for a few seconds but it can be quite annoying. Prior to installing Windows 2008 I was running Vista 64 bit (still boots from another partition) and I had none of these problems. It's as if explorer/foreground apps are being starved of either CPU or something somewhere is blocking I/O.
Examples of when this happens are:
1. Opening an RDP session to a remote server. Upon clicking 'connect' but before the RDP session window opens, explorer and mouse exhibit the lag behaviour during the RDP handshake.
2. If I open the Screen Saver settings in personalisation and then set the screen saver to Bubbles, the UI exhibits about 5-6 seconds of lag/choppy behaviour/broken up sound before it then renders the thumbnail animation.
3. Opening a YouTube video where the YouTube player initially shows it's spinning logo when caching the .flv steam but before it starts playing anything (my ADSL is really slow so this can be quite noticeable).
4. Starting a VM in Hyper-V (RTM), there's a 3-4 second period of loss of responsiveness/lag from the UI while it 'powers up' the VM to the VM's POST screen, then after that it's fine when it gets onto loading windows (i.e. there's loads of disk I/O but UI smooth as a button).
5. When browsers (IE7 & Firefox3) are rendering images on pages that come from other websites. e.g. because your site's PayPal button image is src="https://www.paypal.com/en_US/i/btn/btn_donate_LG.gif" when the browser opens a connection to get this image the UI, mouse and apps get 'the lag'.
6. When UAC blanks the display (secure desktop I think it's called) there is severe lag and it can take about 10 seconds to go from double clicking some admin type task icon (say 'Computer Management') to the screen going blank to eventually showing the UAC confirmation prompt. I've since disabled the 'Secure Desktop'.
Generally I'm quite pleased with Windows 2008 and want to use it because I need to run Hyper-V so I can run virtual 64 bit OS's (we're rolling out 64 bit windows and unix to the platform, I need to dev, debug and acceptance test our apps against 64 bit environments now), Virtual Server 2005 R2 doesn't support this.
Windows 2008 also runs Eve online (the only PC game I play) as well as Vista does (@1900x1200 and all the fancy graphics tricks turned on) but if a game performs some background I/O operation e.g. Eve logging me in then the explorer gets laggy and sticky until that completes.
If anyone else has experienced the same problems and got to the bottom then I'd love to know what you did.
One final question, how safe is it to install the manufacturers own Vista 64 bit drivers for stuff like the chipset, NIC etc on windows 2008 64bit ?
Cheers and thanks in advance.
Kev