I purchased 4 GB of Kingston CL5 ddr2 pc2-5300 ram from Newegg.com for $84.00 and installed it on my 64-bit version of Ultimate. (BIOS V.1.20/1.19)
The m5790 runs a intel 945PM chipset. This chipset can only address up to 4 GB. the PCI and x1800/x1900 addresses up to 512 MB with an additional 256 MB for the dedicated memory.
Because this memory cannot be overwritten, and the chipset can support no more than 4 GB, the BIOS reports 3329 MB (3.25 GB) available and 3325 MB allocated to Vista.
So in Review, Yes the m5790 supports 4 GB of ram, but only 4 GB. The PCI and graphics card reserves aprox. 767 MB, and that leaves Vista with 3.25 GB
note-32-bit versions of Windows Vista limit the total available memory to 3.12 GB
Sources:
http://support.microsoft.com/kb/929605
The m5790 runs a intel 945PM chipset. This chipset can only address up to 4 GB. the PCI and x1800/x1900 addresses up to 512 MB with an additional 256 MB for the dedicated memory.
Because this memory cannot be overwritten, and the chipset can support no more than 4 GB, the BIOS reports 3329 MB (3.25 GB) available and 3325 MB allocated to Vista.
So in Review, Yes the m5790 supports 4 GB of ram, but only 4 GB. The PCI and graphics card reserves aprox. 767 MB, and that leaves Vista with 3.25 GB
note-32-bit versions of Windows Vista limit the total available memory to 3.12 GB
Sources:
http://support.microsoft.com/kb/929605
