how long did it take for your flashing process below to complete?
SUCCESS!
Even a cheap XFX 7970 can be pushed to performance, and without burning it on 90C temperature!
This is not khash-optimization, but khash/Watt - optimization. So below 700khash/s, I am already very happy.
With VBE7 ... I changed only "State 0 - Boot":
Flashing the BIOS (with atiwinflash) took much more than 1 minute, and the progress bar got stuck at 20% and didn't move for ages - it was terrifying! Finally, it said: Successful; then reboot, no driver update necessary! New cgminer measurements (measured Watt are differences enable/disable, on top of small power for idle card):
The improvement is amazing:
So on the same temperature, with less fan speed, I get 12% more khash/s for 17% less electricity.
khash/Watt went up from 2.32 to 3.11 - that's like getting 4 cards coins value out of 3 cards power costs.
YIEHAH!
Now I let it run for a night, to see how stable it is.
This is the way:
0) Reboot, clean system, e.g. no cgminer started.
1) With CPU-Z read out the original ROM, make several copies.
2) With VBE7 change voltage & clockspeeds, save to new filename.
3) With ATIwinflash program the modified ROM, shiver for more than a minute. Reboot.
4) Tweak, fiddle, optimize. A Watt-meter costs 9 euros.
Disclaimer: At your own risk. Inform yourself well.
I spent 2 days of research before I dared to do this. But:
YIPPIEH, I DID IT.
P.S.: If you find this useful, you can tip me at: BTC 15UipUK3kGcArJzRyHbVKrwG5TsqYi1b9N
http://cdn.overclock.net/8/89/89350c26_7970-after-flashing.png
Even a cheap XFX 7970 can be pushed to performance, and without burning it on 90C temperature!
This is not khash-optimization, but khash/Watt - optimization. So below 700khash/s, I am already very happy.
With VBE7 ... I changed only "State 0 - Boot":
| Original: | #0 | CC 925 | MC 1375 | VDDC 1175 |
| MyChange: | #0 | CC 750 | MC 1050 | VDDC 1025 |
Flashing the BIOS (with atiwinflash) took much more than 1 minute, and the progress bar got stuck at 20% and didn't move for ages - it was terrifying! Finally, it said: Successful; then reboot, no driver update necessary! New cgminer measurements (measured Watt are differences enable/disable, on top of small power for idle card):
The improvement is amazing:
| Before: | 1.175V | CC 907 | MC 1450 | 72C | fan 75% | 267W | 619khash/s |
| 1stOptim: | 1.025V | CC 1000 | MC 1585 | 72C | fan 59% | 222W | 691khash/s |
So on the same temperature, with less fan speed, I get 12% more khash/s for 17% less electricity.
khash/Watt went up from 2.32 to 3.11 - that's like getting 4 cards coins value out of 3 cards power costs.
YIEHAH!
Now I let it run for a night, to see how stable it is.
This is the way:
0) Reboot, clean system, e.g. no cgminer started.
1) With CPU-Z read out the original ROM, make several copies.
2) With VBE7 change voltage & clockspeeds, save to new filename.
3) With ATIwinflash program the modified ROM, shiver for more than a minute. Reboot.
4) Tweak, fiddle, optimize. A Watt-meter costs 9 euros.
Disclaimer: At your own risk. Inform yourself well.
I spent 2 days of research before I dared to do this. But:
YIPPIEH, I DID IT.
P.S.: If you find this useful, you can tip me at: BTC 15UipUK3kGcArJzRyHbVKrwG5TsqYi1b9N
http://cdn.overclock.net/8/89/89350c26_7970-after-flashing.png
