What does "Game clock" mean in the specs?

[ZodaEX]

I'm looking at video cards on Newegg at the moment. I see a graphics card that has 3 distinct clockspeeds listed for it under it's product specifications. It has a "core clock", a "game clock" and a "boost clock".

Logically i'd assume that the "boost clock" is the same thing as a turbo clockspeed right? In that case, what does the "core clock" represent? Is "core clock" the same thing as a base clockspeed? The other one, I really have no idea what it indicates - the "game clock".
Would someone mind explaining to me what the difference is between these three different clocks?

 

[FrgMstr]

That is the clock rate you should see under general gaming usage in stock configuration.

 

[LigTasm]

Core clock is the base speed of the chip. Boost Clock is the Nivida branding, and it references the general gaming speed you should see, usually quite a bit higher than the core clock. Game clock is AMD's version. Both technologies do the same thing, increasing performance within the thermal specifications up to a certain limit. Why Newegg lists all 3 on one card sounds like an error.