Okay, so I am learning more and more about Memory clocks/Bandwidth/timings/etcetera.
I am learning mainly about Ram right now. But I have learned that:
bandwidth = DDR clock rate x bits transferred per clock cycle / 8
Memory uses 64 bits transferred per clock cycle, at least up to DDR3 to my knowledge.
So it's not too difficult to figure out that 1333 x 64 = 10664 (which is usually how some vendors mark their product memory). 1866MHz would be 14928, 2133MHz would be 17064 and so we get the numbers (in order of what I posted): 1333MHz = 10.6GB/s, 1866MHz = 14.9 GB/s, and 2133MHz = 17GB/s Bandwidth.
And I thoroughly understand how the timings work and what not.
So my question is, how is GDDR5 determined? Rather, how is the Video RAM determined?
And how? I know this is different, because when I go look at vendor specs of a GPU, I would see lets say 6610MHz (effective) and the memory bandwidth would end up being 105.76 GB/s. Which, if you use the equation given, that would end up being (DDR clock rate x 8) x 2.
So once more, Why and How does this happen?
Thanks ahead for responses!
I am learning mainly about Ram right now. But I have learned that:
bandwidth = DDR clock rate x bits transferred per clock cycle / 8
Memory uses 64 bits transferred per clock cycle, at least up to DDR3 to my knowledge.
So it's not too difficult to figure out that 1333 x 64 = 10664 (which is usually how some vendors mark their product memory). 1866MHz would be 14928, 2133MHz would be 17064 and so we get the numbers (in order of what I posted): 1333MHz = 10.6GB/s, 1866MHz = 14.9 GB/s, and 2133MHz = 17GB/s Bandwidth.
And I thoroughly understand how the timings work and what not.
So my question is, how is GDDR5 determined? Rather, how is the Video RAM determined?
And how? I know this is different, because when I go look at vendor specs of a GPU, I would see lets say 6610MHz (effective) and the memory bandwidth would end up being 105.76 GB/s. Which, if you use the equation given, that would end up being (DDR clock rate x 8) x 2.
So once more, Why and How does this happen?
Thanks ahead for responses!