Re: [ANN] cudaMiner - a new litecoin mining application [Windows/Linux]
...And now something about weird things on my GTX 570 and GTX 760 rigs:
GTX 570
- Most people claim that system RAM has little or no difference in hashrates, but I have suffered serious problems when i left just 2GB on mobo. auto config was reporting MAX WARPS: 171 (instead of 264 reported with 4GB of RAM)?!
GTX 570
- Most people claim that system RAM has little or no difference in hashrates, but I have suffered serious problems when i left just 2GB on mobo. auto config was reporting MAX WARPS: 171 (instead of 264 reported with 4GB of RAM)?!
single memory allocation mode (required for -C 1 and -C 2) has to do a single cudaMalloc() call to get one big chunk of memory.
The WDDM driver model used by Vista, Win 7/8 and later imposes the following restrictions for CUDA.
The maximum size of a single memory allocation created by cudaMalloc() or cuMemAlloc() on WDDM devices is limited to MIN( (System Memory Size in MB - 512 MB) / 2, PAGING_BUFFER_SEGMENT_SIZE ). For Vista, PAGING_BUFFER_SEGMENT_SIZE is approximately 2 GB.
And you've just reduced your "System Memory Size in MB" to 2GB.
To solve it, try either
1) switch to Linux or Windows XP
2) don't use -C 0 or -C 1 so that cudaminer doesn't have to use single memory allocation mode
3) use some card BIOS/hardware hacks to use the nVidia TCC driver (that is made for Tesla and doesn't have these restriction).
I'd vote for trying 2), followed by 1). Don't brick your card with 3)
Christian