Dell ATI Radeon 9800 Chip Markings

[isekii]

How would you know that it's a Samsung 2.8ns Chip ?

 

[modedepe]

It will say something like this:

SAMSUNG 316
K4D26323RA-GC2A <---GC2A is the code for 2.86ns ram, GC33 is the code for 3.3ns