Inspired by these peculiar settings ...
Usually, the optimal khash appeared around engineclock/memclock = 0.62 to 0.64.
But now I have found a new one, at memclock/engineclock = 1.06, that is more engineclock than memclock (!).
It has less khash, but so much less Watt that it's worth it.
It's the third (C) in this before-and-after table:
(A) = before undervolting (before I started this thread)
(B) = best undervolting (stable > 39 hours)
(C) = best undervolting & underclocking (stable for many days now)
3.78 instead of 2.88 is pretty amazing.
Yes, compared to the max possible hashing performance, I loose out on 16% hashrate - that is like throwing away 38 euros worth of 229 euros hardware; but on the other hand, the new settings (C) are saving 36% electricity compared to the max hashing performance (B), and 45% of electricity compared to before-the-undervolting (C).
This new sweet spot is cool:
Mem clock slightly lower than engine clock, for an XFX 7970!!
People in Solomon, Virgin, Turks, Caicos and Marshall Islands, Tonga, Jamaica, Niue, Denmark, Samoa, Tuvalu, Germany, Philippines, Cook Islands, Brazil, Kiribati, Belgium, Netherlands, Italy, Ireland and Sweden - we are the good ones, because our governments actually care about the environment *g*. But here's a way for us, to also participate in cryptomining - we have to undervolt and underclock our coinmining rigs dramatically.
EDIT: #37 has become THE posting about this low energy mining.
I suggest try value like these.... power usage is about 180W x card.
GPU 1: 625.1 Kh/s | I:13
58.0 C F: 51% E: 915 MHz M: 960 Mhz V: 0.981V
... I have searched for sweet spots in completely new places. And found one in an unexpected area!GPU 1: 625.1 Kh/s | I:13
58.0 C F: 51% E: 915 MHz M: 960 Mhz V: 0.981V
Usually, the optimal khash appeared around engineclock/memclock = 0.62 to 0.64.
But now I have found a new one, at memclock/engineclock = 1.06, that is more engineclock than memclock (!).
It has less khash, but so much less Watt that it's worth it.
It's the third (C) in this before-and-after table:
| CC | MC | Volt | Celsius | khash | Watt | khash/watt | |
| (A) | 907 | 1450 | 1.175 | 74 | 622 | 277 | 2.25 |
| (B) | 1025 | 1635 | 1.038 | 73 | 692 | 240 | 2.88 |
| (C) | 854 | 799 | 0.893 | 70 | 578 | 153 | 3.78 |
(A) = before undervolting (before I started this thread)
(B) = best undervolting (stable > 39 hours)
(C) = best undervolting & underclocking (stable for many days now)
3.78 instead of 2.88 is pretty amazing.
Yes, compared to the max possible hashing performance, I loose out on 16% hashrate - that is like throwing away 38 euros worth of 229 euros hardware; but on the other hand, the new settings (C) are saving 36% electricity compared to the max hashing performance (B), and 45% of electricity compared to before-the-undervolting (C).
This new sweet spot is cool:
Mem clock slightly lower than engine clock, for an XFX 7970!!
People in Solomon, Virgin, Turks, Caicos and Marshall Islands, Tonga, Jamaica, Niue, Denmark, Samoa, Tuvalu, Germany, Philippines, Cook Islands, Brazil, Kiribati, Belgium, Netherlands, Italy, Ireland and Sweden - we are the good ones, because our governments actually care about the environment *g*. But here's a way for us, to also participate in cryptomining - we have to undervolt and underclock our coinmining rigs dramatically.
EDIT: #37 has become THE posting about this low energy mining.