07-02-2012, 11:04 AM
*Multiple facepalms*
GDDR5 doesn't necessarily matter, at least not directly. But video memory bandwidth does matter and GDDR5 does affect that.
Video memory bandwidth = memory transfer rate (also called effective frequency or effective clock rate) x total memory bus bitwidth / 8 (assuming you want it in B/s)
Because GDDR5 is quad pumped instead of double pumped it typically has a higher transfer rate which helps improve video memory bandwidth.
It can make a huge difference or none at all depending on the exact hardware frequencies being compared and the software being used.
GDDR5 doesn't necessarily matter, at least not directly. But video memory bandwidth does matter and GDDR5 does affect that.
Video memory bandwidth = memory transfer rate (also called effective frequency or effective clock rate) x total memory bus bitwidth / 8 (assuming you want it in B/s)
Because GDDR5 is quad pumped instead of double pumped it typically has a higher transfer rate which helps improve video memory bandwidth.
It can make a huge difference or none at all depending on the exact hardware frequencies being compared and the software being used.
