Quote:
Originally Posted by FlameOn
I believe both boxes use a unified memory architecture meaning memory is collectively shared between GPU and CPU so they are used for the same purpose on both systems. Difference being GDDR5 memory bandwidth is substantially better than the DDR3.
|
GDDR5 has a higher clock speed but only runs on a 32 bit bus whereas DDR3 runs on a 64 bit bus. Even though DDR3 is about half as fast, it's bus width is twice as wide so the bandwidth achieved is about the same as GDDR5. Also, GDDR5 has much poorer latency compared to DDR3.