My system: Windows xp pro msi k8n neo 4-f mobo amd 64 3000+ xfx 6600gt 128mb pci-e 2-512 mb kingston pc3200 ddr KVR400X64C3AK2 (in dual channel) 2-512 mb corsair pc3200 ddr CMX512-3200LL (in dual channel) Okay, heres the question. I just added the corsair memory (a freebie from my son). After I did, I had to re-activate windows (never happened before) and when I go to control panel and system and look at the first page, under the memory it recognizes the 2gb of memory and says "physical address extension". Is that a bad thing or a good thing? I have done a lot of remodeling inside a computer before, never had to reactivcate windows from it and never seen that "physical address extension" show up. Thanks guys.
I'm not sure what the physical address extension bit is all about offhand, though it wouldn't surprise me if it's related to the 64-bit-ness of your CPU, or is an aspect of Windows I haven't encountered yet.
The reactivation is relatively normal. When you first install Windows, it creates an ID (which I think is a hash of all the hardware IDs in the system). Every time Windows boots, it compares the current hash (based on whatever is in the system at the time) with the original. If they become too divergent, M$ forces you to reactivate, under the assumption that you've installed an existing copy of Windows onto a new machine. It's a major PITAand that all I'll say on it here, but just go ahead and reactivate. If they force you to call in to do so, tell them that you had a stick of RAM go bad and that it had to be replaced. "Failure" and "replace" are good words; "upgrade" and "new" are bad words (or so I'm told from someone else's experience).
The "physical address extension" didn't show up until i had added the second group of memory (corsair). Up until then, under the computer part of the system - general page, it was blank beneath the memory. It is just a strange coincident that i had to re-activate windows and saw the "physical address extension" show up. I have changed motherboards, processors, hard drives, added memory, changed video cards and never had to re-activate. I ended up having to telephone in to get it re-activated. One other thing that occured as a result of the new memory, my AVG virus scan software had to be re-installed as it said it was corrupted.
Couldn't tell you why AVG would tweak out over that, especially as I haven't got an extra gig of memory to play with at the moment.
As for the reactivation on memory, consider this: I have a Seagate Barracuda 7200.7 with WinXP on it that was running in a Shuttle XPC based on the nForce2 chipset for the original install. I've since sold that XPC, but I kept the hardware from it. Since then, I've put that hard drive--without a reinstall or HAL rebuild, mind you--into a tower running an Intel i875P-based motherboard without having to do anything. Conventional wisdom states that a change that drastic requires a reinstall just to get Windows to work properly, let alone simple activation. On the other hand, I've been confronted with that stupid activation requirement before for simply removing an optical drive. Chew on that one.
I can guarantee you that the reactivation and that address message were both the result of your new memory; I just don't know why exactly it happened.
Go figure. Who knows what evil lurks in the minds(?) at ms? Thanks much for the input, and if you run across anything about the PAE, please let me know. Cheers!
CA38368, Do these links make any sense to you? I don't want to slow the computer down due to this, so I am not sure if this physical address extension has any detrimental effect on the memory. I do not have the /PAE switch in my boot.ini and the post reports the memory is running in dual channel mode. thanks, http://msdn.microsoft.com/library/default.asp?url=/library/en-us/memory/base/physical_address_extension.asp http://www.microsoft.com/whdc/system/platform/server/PAE/PAEdrv.mspx
I didn't make it!
Thats weird it says PAE is used with Intels but you are running a AMD :s
21st February 2005
Well this is new to me. I knew you had to activate Windows if you install a new Motherbored or Harddrive but never knew you had to when adding more Ram. Wtf.... I'm really glad I use Linux even more now. Esh thats just getting out of hand.
AgentlaidlawWell this is new to me. I knew you had to activate Windows if you install a new Motherbored or Harddrive but never knew you had to when adding more Ram. Wtf.... I'm really glad I use Linux even more now. Esh thats just getting out of hand.
Read my first reply.
21st February 2005
Oh. Esh way out of hand. Honestly I know M$ is trying to stop warzez but come on thats just messed up.