Quote from: uninexus on March 06, 2017, 06:10:01 AM

Quote from: rinus on March 05, 2017, 10:51:52 PM

Quote from: Truthchanter on March 05, 2017, 10:45:39 PM

Quote from: rinus on March 05, 2017, 10:23:18 PM

Quote from: rinus on March 05, 2017, 02:08:39 PM

ok i think this is the topic i was looking for

.
I have 4 RX 480 nitro+ 8gb , an old mobo with 4 pci slots , 4 pci risers and 1200w corsair 1200i PSU. i am already trying to mod bios for a week now , modding itself is easy but getting the rig rock stable does not work for me ...

my resultas so far :

started out with base bios and base settings , so i get 640 hash per card so 2550 all together , runs stable for 15 hours ( did not test it longer but it looks really stable ).
then i tried 1500 straps , 1625 straps and last 1750 straps ( seem to be the best for rx480 with samsung memory ). But when was mining with all of these straps in all 4 cards
with basic settings , the rig does only run for a couple of hours. with the 1750 straps and basic settings it run for about 8 hours and crashed then. So for me its hard to believe
that people run theste rigs with 1750 straps on the same cards like i have AND also undervolt the hole thing... it would be nice though if somebody could tell me what i am doing wrong.
i ordered 12 more rx 480 and also some Pro btc 2.0 motherboards , so i can have 6 cards on 1 mobo instead off 4. and hopefulle the mobo makes my rig a bit more stable but i dont think it has someting to do with
stability.

So to make things short
- running base bios and base settings ==> rock stable
- running 1750 timings in new bios and basic settings ==> 8 hours stable max !

- now i am running base bios and changed on 1 card the memory from 2000 to 2100 , running stable for 4 hours now and when its stable for 12 hours , i will apply same setting to seconds card , and so on , so on ...

i will keep u guys posted about my progress.

in the mean time , it would be nice to get some ideas of what i am doing wrong or why is it unstable with 1750 timings and base settings? should i make a script that restarts the miner every 3 hours? like this it can maybe mine stable with high hashrate and low power consumption and not crash the whole rig ...

Ok so I just tried to put 1750 straps in my first card and after 2 hours it crashed. How do u guys keep it stable? Automatic restart of miner ?

If it's crashing, can be many things: bad risers.. too high overclock, too low undervolt. What volts and clocks are you using?

Stock factory BIOS. And highest p7 freq 1342 MHz at ,1150 MV. 2000mhz Mem at 1000mv. These are my stock settings and runs stable 15 hours ( did not test longer ). I just tried to set Mem from 2000 to 2100 on alnmy cards still using stock BIOS and it crashed after 10 minutes. Windows reboots and start mining again... And sometimes it's just stuck, no reboot

Which RAM brand do you have on your 480s - is it Samsung on all of them ? What is your ASIC quality on the GPUs ?

Yes Samsung on all of them. Asic quality is between 65 and 68 procent. Any idea?