Re: Low hashrate on 7970 scrypt? Under 700Kh/s? Here's what to do...
Hey, so I've made some changes with my setup. My XFX HD7970 DD can now reach 700 KH/s, and is stable at around 680 KH/s. I'm still tinkering with it, but I think it's possible to break the 700 KH/s + mark. Here is the guide that I used and a link to the bios that I used to flash the card:
The forum where I grabbed this from can be found here: https://bitcointalk.org/index.php?topic=174036.msg1980690#msg1980690
Here is the solution for the 7970 Ghz card. Mine is a Sapphire 7970 Vapor.
Flash with this bios http://www.techpowerup.com/vgabios/127156/GigabyteHD7970.3072.120905.html
635 kh/s @ 900/1580 -I 13 -w 256 -g 2 TC 11200
Thanks to asmzx for this fix.
Flashing 7970 is a breeze, I'll tell you the steps I took to get it working.
Flash Sapphire 7970 Vapor:
Download Rufus http://rufus.akeo.ie/ or create a bootable USB drive
Get ATIFlash http://www.techpowerup.com/downloads/2230/ATIFlash_4.07.html
Copy ATIFlash and the bios to the USB drive
To boot from your USB, just press F8 after you power on your computer and it should bring up the boot menu, if not keep resetting until you get it.
Select your USB from there and it should boot you to DOS/ATIFlash.
Gets the device ID of the card
Use the number you got from the first step instead of 0 if it is different. Also change the name to whatever you named your BIOS.
For me, I named my BIOS "new.bin". Wait until it is successful and then reboot.
That's it, enjoy 630+ speeds without melting your card!
LTC Ld19ZpNDcnTKQr1b8K1dWSwRXPd6zSxPkN
Flash with this bios http://www.techpowerup.com/vgabios/127156/GigabyteHD7970.3072.120905.html
635 kh/s @ 900/1580 -I 13 -w 256 -g 2 TC 11200
Thanks to asmzx for this fix.
Flashing 7970 is a breeze, I'll tell you the steps I took to get it working.
Flash Sapphire 7970 Vapor:
Download Rufus http://rufus.akeo.ie/ or create a bootable USB drive
Get ATIFlash http://www.techpowerup.com/downloads/2230/ATIFlash_4.07.html
Copy ATIFlash and the bios to the USB drive
To boot from your USB, just press F8 after you power on your computer and it should bring up the boot menu, if not keep resetting until you get it.
Select your USB from there and it should boot you to DOS/ATIFlash.
Code:
atiflash.exe -i
Gets the device ID of the card
Code:
atiflash.exe -f -p 0 new.bin
Use the number you got from the first step instead of 0 if it is different. Also change the name to whatever you named your BIOS.
For me, I named my BIOS "new.bin". Wait until it is successful and then reboot.
That's it, enjoy 630+ speeds without melting your card!
LTC Ld19ZpNDcnTKQr1b8K1dWSwRXPd6zSxPkN
The forum where I grabbed this from can be found here: https://bitcointalk.org/index.php?topic=174036.msg1980690#msg1980690
Did you actually use the Gigabyte bios listed, or something else for the XFX 7970 DD?
For the record, I used the bios mentioned in this quote, and my XFX 7970 DD performance went from a high of single thread 550 (I could never get >400 using 2 GPU threads) to 690 (690 using stock mem/cpu settings, but 2 GPU threads). This is the best thread ever, and I'll be sending some donations out for sure. Can't wait to tweak mem/cpu later tonight and break 700!
