Memory Clock

[matiasht]

Hello everyone! I recently was checking out, if I recall right, the AMD Radeon 6770 specifications, I was amazed by this peculiar detail.

Core Clock 790mhz
Memory Clock 4800mhz

I mean, isn't that like a bottleneck for the GPU? I mean the data in memory can be processed super fast, but the core engine can not deliver that data, that quickly!

I hope you can vanish my doubt!

Salutes!

 

[zhihao50]

where you get the data from, quick check with wiki it states 1200MHz for memory and 850 for core.

 

[jsc]

GDDR5 is the equivalent of DDR3 computer memory where the RAM clock freq is 4 times the memory frequency.

So it would be just as accurate to say memory freq of 1200 MHz.

Engineers would proably say "memory frequency 1200 MHz". Marketing would probably say "memory clock 4800 MHz.

Which sounds more impressive?

 

[julius 85]

GDDR5 is the equivalent of DDR3 computer memory where the RAM clock freq is 4 times the memory frequency.

So it would be just as accurate to say memory freq of 1200 MHz.

Engineers would proably say "memory frequency 1200 MHz". Marketing would probably say "memory clock 4800 MHz.

Which sounds more impressive?

1200 MHz is the real frequency, but 4800 MHz is the effective frequency. It is 4 times higher, because GDDR5 memory can transfer 4 data per clock cycle.

 

[matiasht]

Thank you guys, that's just what I thought it was, QDR!