Huh? I love you guys! I had to go find out for myself. From the pocket pc tech site
http://www.pocketpctechs.com/main~se...064-128RAM.htm
" Upgrade your Dell Axim X51v series internal RAM from 64MB to 128MB with our upgrade service. During the upgrade process we remove the existing 64MB and install 128MB. This unit uses low voltage hi-speed BGA memory, so stacking is not available and 128MB will be the maximum capacity. "
So unless I'm all confused, (like--heh--that never happens), you have 256MB Flash, 64MB SDRAM for a total of 336MB memory with the x51v as it comes from the factory. With the tech's upgrade you get an additional 64MB SDRAM (400MB memory) or 128MB SDRAM + 256MB flash. However, its actually more than twice the SDRAM you had before because 64SDRAM only has 49.47MB that are useable.
How useful is 128MB SDRAM as opposed to 64MB SDRAM? Anyone care to speculate?