I have a gigabyte 7950 3 gb and I tryed some options and can't resolve the problem, it always bails :
Allocating/mapping single buffer failed with: clEnqueueWriteBuffer(-4). GPU can'
t allocate the DAG in a single chunk. Bailing.
clEnqueueWriteBuffer(-38)
Please help me out I am trying for 3 days now... i have catalyst 15.7.1.
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insert this sentences in bat file for starting ethminer:
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
SET GPU_SINGLE_ALLOC_PERCENT = 100
It should work.
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
and --cl-extragpu-mem 0
This is one of the .bat
Another one is :
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 95
setx GPU_SINGLE_ALLOC_PERCENT 95
First was 100 then modifyed for 95
Note that the gpu has 3gb
Tryed varios setting and bailing every time.
Now I am trying an older version of catalyst.
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 95
ethminer.exe -G -F http://127.0.0.1:8080 --farm-recheck 400 --cl-local-work 256 --cl-global-work 16384
Currently using 15.12 drivers