I do not understand why I am unable to use yacminer.
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-R 2560 -g 1 --buffer-size 2560 --lookup-gap 8
5*280x
1*7870
8Gb Memory
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YACoin N=16 today!
you overrun your GPU's memory with these settings! (R= far too high)
Perhaps these settings work earlier with lower N value but really not with N16.
Look N tables, it tell how much memory N16 need for one calc then you know what is perhaps ok R with lookupgap 8 and your buffer size (your buffer size is ok for 3Gb GPU's).
This time N=16. (N14 need 4Mb, N15 need 8Mb and N16 need 16Mb. Next step, N17 need 32Mb etc...
(if stay with -g 1)
Lookup gap 8 means that this 16Mb (or what ever it is with current N value) is divided to 8 "gaps". So, one is 2Mb.
Memory (buffer) 2560Mb can take 1280 2Mb "gaps" at once. So -R max is 1280.
then this "hassle" (--temp-cutoff 95 --gpu-fan 0-100 --auto-gpu --temp-target 85 --temp-overheat 95 ) any idea for these paramaters? Why run so hot, and why --auto-gpu?
If I set these for my R9 280x rigs (Sapphire Toxic R9 280x) I will set --temp-cutoff 90 --auto-fan
I do not understand what for you use --auto-gpu ?? it is for autoadjust GPU clocks (for temperature), really strange in this situation. (perhaps mistake)
And if really need some details. I'm not GPU specialist! So these are only some winks for starting finer adjusting.
Also this may give some help http://www.ultracoin.net/configgen_raw.html
(remember select N16)
Btw...how fast hashing you expect with R9 280x with N16?