Asus A8V Deluxe Can't see full 4GB

[Peter Arremann]

On Tuesday 06 December 2005 15:31, tweeks wrote:
> Hey Guys..
>
> Disclaimer:
> I've googled the list... and didn't see anything...
>
> I've got a guy running an Asus A8V Deluxe w/Ath64 3000+ and 4 sticks of 1GB
> and his setup (with either RH-EL3 64bit or RH-EL4 64bit) seems to be
> exhibiting the classic x86/32bit problem of not being able to map the
> memory around the 512MB PCI memory/chipset mapping.  I'm not sure about the
> 2.4 kernel, but I would think that the 2.6 64bit kernel (or the
> motherboard) could map that memory high (beyond the 32 bit range) to access
> all 4GB, but nothing stands out on how I should go about doing this (BIOS
> seems void of any such "settings", and I know of no OS/kernel (sysctl)
> parameters that can do this).
>
> And no.. Running PAE is NOT desireable.. This is a 64bit system.. why can't
> I either map-high, or around the PCI hardware limitation?! (and NO.. I
> don't want to add another 1GB to "get around it").  This guys wants 4GB..
> Not pay for 5 get 4.5.
>
> Am I missing something here... or is this system simply NOT going to be
> able to get to that last PCI mapped 512MB?
>
> Anyone?
>
> Tweeks

This is normal for many 939 PC boards. The A8V board description isself states 
right there in big bold letters that if you install 4GB you will only see a 
little over 3GB. Virtually all boards based on via or and nforce 3 chips have 
this issue. Most boards with NForce4 do as well but there are some 
exceptions. All NForce Professional boards I've seen are good. As are SIS.

Since your motherboard description says its not possible to see all 4GB and 
its based on a VIA chipset you'll probably not be happy. 

Peter.