ejn63 wrote:The limitation is one of the chipsets used on these systems - remember that in addition to part of your RAM being used for video purposes, other blocks of RAM are used by the chipset to manage the functions of the system board.
I hate to resurrect a 4.5 year old thread, but this is STILL an issue, at least in the Latitude D520, BIOS version A08.
It's enfuriating to be limited to 3.25GB of RAM. Since the BIOS just says that the memory "isn't available for use" (paraphrasing a bit there), I can only assume that the memory is reserved for the video card. Either way, end users like me desperately need a BIOS option that allows us to choose the amount of memory reserved for "system use". Since the system current reserves 768 MB of RAM for system use (which is absurd), I'm thinking the BIOS could provide the following selections as options:
0MB - (this is only an option if the video card does NOT share the system memory)
64MB - (probably also too low for the same reasons as the 0MB case)
128MB - (this should be fine)
768MB - (for backward compatibility, in case OS drivers depend on the 768MB reservation - which they certainly SHOULD NOT).
I would really appreciate a response from someone that can provide more insight into this issue. If Dell doesn't want to release another BIOS update (last one, A08, was released in 2009), Dell could/should provide the following instead:
1) A detailed technical explanation for why the limit exists
2) Hardware manuals and user guides for all BIOS related components
3) Source code for the latest BIOS so that those interested could fix BIOS related issues. This is especially important because the latest BIOS was released in 2009, and I can only assume that Dell has no plans for further BIOS updates.
All of the above would be very helpful in finding a fix to this nagging issue.
How can we get Dell's attention to address this matter?
I just migrated to win7 x64 and learned this sad fact