Originally Posted by Brutuz
It's not any more prevalent than bent CPU pins, apart from a few bad motherboard makers.
Yeah, I wrote that before I read that post and forgot to remove it.
Latency doesn't matter anywhere nearly as much as bandwidth to a certain point, the current IGPs would be far more limited by bandwidth than latency, and AMD could easily make another channel or sideport that gets pins in the CPU socket for some sideport memory.
Not saying it was, and usually pins (motherboard or CPU) get bent by user error, not from factory.
I'm not sure why you appear think that you could get higher bandwidth with an on-board solution than with an on-die. And even if you have a direct pinout to the memory, it's still going to have a higher latency than on-die memory due to the increased distance. This is one of the same reasons that everything started getting put on the die to begin with.
My point is, why put the memory on the motherboard? What would you gain from doing that? If you have an APU with a iGPU that realistically couldn't take advantage of anything more than 512MB, why would a person want to pay extra for a motherboard with 1GB? So you buy the one with 512MB, because it's cheaper. Makes sense.
But then lets say you upgrade the APU and the new iGPU can utilize more than 512MB. Since you initially bought a cheap motherboard with only 512MB you now have to upgrade both components to get the most out of your hardware.
I see no reason for AMD to invest in motherboard based "sideport" video memory when that's basically what they are doing with RAM right now anyway.
If I were an AMD engineer, I would most certainly aim to put GDDR on the die it's self. High bandwidth, low latency, and capacity and speed will upgrade with the new hardware that relies upon it.
Sounds pretty dreamy to me.Edited by SectorNine50 - 10/1/12 at 8:53pm