Installing Windows Server 2008 R2 (require x64) on Optiplex GX620

You need a CPU that supports EM64T extensions - that is, a 64-bit CPU.  Most 620s have P4HT CPUs, none of which have EM64T support.  There ARE some Pentium D CPUs with EM64T that should work - however, the GX620 WILL NOT support any of the later Core (Core, Core2, etc.) CPUs.

In other words - you need at least a CPU upgrade to run a 64-bit OS.  At that, don't expect VT support if you need that - for that you need a Core-based system (i.e., a new computer).

As far as the processor requirements go, you should be able to install it then.  What happens when you attempt to install from the DVD?  BIOS updates can help - they often include code to make it compliant/compatible with new OS requirements.

The GX620 supports hyperthreading P4s, which are not 64-bit CPUs.  You'll need a newer system to run a 64-bit OS - one that supports a 64-bit CPU.

Thanks for understanding

You will have to boot to this DVD, you will not be able to run anything from your x86 OS.  Which processor does your GX620 have ... many Pentium 4 processors are NOT x64 compatible?

Although, they don't keep adding support indefinitely for OS's this way ... it is unlikely they planned support for OS's past XP, but still it can't hurt if it is severely out of date.

Buying a server - low end or not - is not always an option and is not always necessary.  I'm sure he is not deploying this in a production environment.  He just wants to know how he can or why he can't.

why would you do this anyway? buy a low end server.

Its not Pentium D but it says EM64T supported.

Well it seem I have to dump this PC and look for another one.

I have the same Dell Optiple GX620 with 3.0 GHz processor, 1GB RAM and 80 GB Sata Hard Drive and I am able to Install Windows 2008 Standard Edition but the only problme is that I am unable to source VGA and Sound Driver . This seems I can't get drivers for Windows 2008

Finding drivers for Win Server 2008 R2 may be an issue. You may be able to fall back to using Win7-x64 drivers although you'll likely have issues with sound and video. Dell have chosen to not support newer OS's whith these systems, they'll rather you buy a new machine.

Have a look at this site which discusses loading Wi7-x64 on the GX620 which may be helpful.

sky mentioned that Dell does not support "newer" OS's, but just to be clear ... no Server OS has been or ever will be "supported" by Dell on any of their desktops or laptops.  That does not mean it won't work - simply that it "may" not, and in either case, it is up to you to find drivers and get it working.  I've run Server OS's on a lot of workstations for testing/lab use, and in nearly every case, you can get it to work (audio can be hard but should not be a deal-breaker on a true "server" OS).

sky also mentioned using Windows 7 drivers.  As long as their is not an "OS check" for the installation package of the driver, you should be able to use a Windows 7 (or even Vista) driver for 2008/2008R2.  You can go directly to the device manufacturer's website for drivers (Intel graphics/chipset, Broadcom, SoundBlaster, etc.) or find another system with the same device that does support Vista/7 (harder - may need to also browse other OEM's systems for OEM-only devices - HP, etc.).

theflash is correct, server OS's have never been supported on desktops or laptops which is understandable from a support perspective.  I should have been more explicit on this point.

My first guess would be bad media ... I would try downloading the ISO again, checking the hash, and/or using a download utility to ensure the integrity of the file.  I would also try burning the DVD again, using a slower speed, different software, and/or a different drive/PC.