1. Any idea why there would be this limitation in the T kernel for Scrypt-Jane? If I set to autotune Cudaminer instantly takes up 5.5GB of VRAM but once it begins testing any config that would result in > 3GB to be allocated the autotune crashes out. Any manual settings to allocate more then 3GB falls under the same issue.
4. Do you feel this 3GB limit may vanish using a Linux build due to better VRAM allocation?
1) Use a 64 bit Linux, then you should be able to use more than 4 GB at once. I have had someone autotune scrypt-jane (N=32768) with -L 1 and -L 2 on a Tesla M2090 recently
He sent me his results via Skype, e.g. with -L 2:
GPU #0: maximum total warps (BxW): 324
1.83 khash/s with configuration X71x2
2) Vista, Windows 7, Windows 8 tend to have huge issues with large memory allocations on the card (WDDM driver model restrictions).
3) I don't have access to such hardware myself, so my testing opportunities are zero, essentially.
Christian