Re: why 1G memory is missing?

[IL Ka <kazakevichilya@gmail.com>]

That cpu was normally paired with the Intel 945 chipset that can’t support more than about 3.25GB whether or not it’s 32/64 OS

 

Yes, and even worse: this CPU doesn't support 64bit OS

model name	: Intel(R) Atom(TM) CPU N280   @ 1.66GHz
address sizes	: 32 bits physical, 32 bits virtual

https://ark.intel.com/content/www/us/en/ark/products/41411/intel-atom-processor-n280-512k-cache-1-66-ghz-667-mhz-fsb.html

 Instruction Set: 32-bit