It is received wisdom that more RAM is always A GOOD THING ! and so may form a New Year resolution. However as my experience shows it isn't always that simple.
I decided to up the RAM from 2*0.5 Gb sticks to 2*1 Gb.
However this was far from straightforward. Summarising the results, 1 + 0.5 Gb worked OK but 1+1 dropped the clock from 200MHz to 163MHz !
Fortunatly I had met a similar problem but the explanation may be worth posting.
The 200 MHz is timed by an 18.2 MHz crystal running on it's 11th overtone.(18.2 *11 = 200MHz in round numbers) The extra loading of 2Gb of RAM, probably capacitive, was too much for the circuit so it flipped to the next lower overtone, the 9th at about 163MHz.
As to results, I haven't yet seen much change from the original ! altough on another computer photo editing was much faster.
