Sorry - I do not quite understand the answer. Maybe I don't know enough about hardware. Let's take it a bit slower.
Here's what my BIOS shows:
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BIOS Info: A15 (02/04/2010)
System: Dell Studio XPS 435T/9000
Processor type: Intel i7 CPU 920 @ 2.67GHz
CPU Speed: 2.67GHz (133x20)
Processor L1 Cache: 256 KB
Processor L2 Cache: 1024 KB
Processor L3 Cache: 8192 KB
Memory Installed: 8192 MB <----- Should be 16 GB!
Memory Available: 8192 MB
Memory Speed: 1066 MHz (133x8)
Memory Technology: DDR3 SDRAM
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In the Windows Resource Monitor -> Memory -> Physical Memory I see:
Hardware reserved: 8202 MB, Available: 3497 MB, Cached: 2281 MB, Total: 8182 MB, Installed: 16384 MB
How is it possible that Windows sees more installed memory than the BIOS does?
In MSConfig, I tried to check the box and specify "Max mem: 16384 MB". I restarted the PC, but the result is the same.
In the BIOS, there is no option to "disable the Intel on-board graphics". My graphics card is an Nvidia GE Force GT 620.
Can you be more specific about what I should try to change and where?