An example of a Roofline model in its basic form. As the image shows, the curve consists of two platform-specific performance ceilings: the processor's peak performance and a ceiling derived from the memory bandwidth.
1Numismatics is the official term for coin collecting. Apart from coins, it also refers to the collection and study of paper currency and tokens. A coin collector can be called a numismatist. 2What we call the âpennyâ is actually a misnomer which is really named the cent. Donât let a true collector hear you say the word âpennyâ! 3From the years 1850 â 1873, the US minted a 3 cent silver piece.
Grading is a team effort, with at least two professional numismatists examining every coin. To maintain impartiality, NGC's coin graders cannot be involved in the commercial buying and selling of coins. Each coin is examined by one NGC coin grader at a time, who enters the coin grade into the system.