What is so hard to understand?
I said it doesn't work because the mining process becomes more difficult for everybody. As some guy here said, GPUs wont be able to cope and eventually the only miners will be ASIC with larger memory
Just adding standard DDR3 RAM is too slow.
DDR3-2133 Peak Transfer Rate: 17066⅔ MB/s
GPU-Z says my 7950 has 240GB/s. And scrypt relies on memory speed.
The new FirePro cards will get 12GB of RAM for example.
Dunno how cheap an ASIC is with massive GPU memory and GPU bandwith + the risk that N would be changed.
And miners would still be able to compete with CPU mining with large amounts of RAM at high N against high memory ASICs.