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Wanted to share my experience and config. Please give me feedback if you have anything that you think looks strange.
I'm currently getting 480KH/s per card with no hardware errors. Temp was around 86c the first 24 hours. But it has increased to 90-91c. I'm guessing the rooms general temperature is increasing (no open window and door closed). I have no chassi and no external fans atm, I plan to get the temp down after I modify the rig more and find a solution where I can have the window open.
The 290 are spaced with 2 pci slots in between. So it's only the "inner" card that gain to 90c. The "outer" card is stable around 75-77c.
It has been going on very stable, however, it crashed this night at 02:45 with nothing explained in the logs. First unannounced crash so far. (meaning when im not experimenting)
My gear:
2x Gigabyte R9 290 OC Windforce
1x 1000w
2x 4GB DDR3 1600
1x SSD 60GB (faster booting)
Win7x64sp1
My config:
gpu-engine 1070
gpu-memclock 1500
gpu-powertune 50
Intensity 20
temptarget 80
temp-overheat 95
temp-cutoff 98
tc 24550
I have been able to go up to 955KH/s stable on scrypt also with this config.
Oh and I'm going all in on VTC
update:
open door and cranked window and the temp is steady around 85/86c with 481KH/s per card
