Originally posted by: jgigz
From my expierience with dell, most of their cases are micro atx so youll need to get a mobo thats compatable with micro form factor. Another thing to note is that the HSF will only fit on that motherboard and in that case, so more than likely you will have to buy an aftermarket HSF. And the last bit of advice that i have for you is when my bro tried upgrading his video card ram and mobo on his dell, windows will not allow you to re-register it seeing as its been applied to certain hardware and dell only allows you to make very minimal upgrades (mem, vid card at max) so it pretty much renders the OS useless if you're making that big of an upgrade. It happend to my brother when he tried to upgrade then he wound up eating 200$ for xp home. Hope I helped.
Edit: You would probally be better of just using the proc and other stuff and plan on building another computer. It will save you a very big headache.
I did some checking on this as well , In Jgigz case , this is probably correct becuase this would be considered a MAJOR hardware change. Windows has to be re-registered if the changes are so major that 7 points on the hardware scale do not match the previous system. Microsoft has a scale that they use to identify each piece of hardware in a system on a points scale. If all you are replacing is the motherboard and keeping everything else....processor , harddrive , ram , CD / DVD drives , floppy drive you should be fine. But you may want to read below and see if it will apply to your situation.
From microsoft's website.
http://www.microsoft.com/ireland/piracy/acti_faqu.asp#details
click on Technical activation details , then scroll down to How does product activation determine tolerance?
How does product activation determine tolerance? In other words, how many components of the PC must change before I am required to reactivate?
Common changes to hardware such as upgrading a video card, adding a second hard disk drive, adding RAM or upgrading a CD-ROM device will not require the system to be reactivated.
Specifically, product activation determines tolerance through a voting mechanism. There are 10 hardware characteristics used in creating the hardware hash. Each characteristic is worth one vote, except the network card which is worth three votes. When thinking of tolerance, it's easiest to think about what has not changed instead of what has changed. When the current hardware hash is compared to the original hardware hash, there must be 7 or more matching points for the two hardware hashes to be considered in tolerance. If the network card is the same, then only 4 additional characteristics must match (because the network card is worth 3, for a total of 7). If the network card is not the same, then a total of 7 characteristics other than the network card must be the same. If the device is a laptop (specifically a dockable device), additional tolerance is allotted and there need be only 4 or more matching points. Therefore, if the device is dockable and the network card is the same, only one other characteristic must be the same for a total vote of 4. If the device is dockable and the network card is not the same, then a total of 4 characteristics other than the network card must be the same.
The 10 hardware characteristics used to determine the hardware hash are: Display Adapter, SCSI Adapter, IDE Adapter, Network Adapter MAC Address, RAM Amount Range (i.e. 0-64mb, 64-128mb, etc), Processor Type, Processor Serial Number, Hard Drive Device, Hard Drive Volume Serial Number, CD?ROM / CD-RW / DVD-ROM.