Low Hash- Gigabyte HD 7970(R797OC-3GD) BIOS Flash Help

[emunebtk]

Thanks for the advice everyone! Going to do another BIOS flash with BIOS 015.025.000.007.000000 now that I am fully comfortable doing it and then reinstall with 13.3 and try nitrogenetics configs.  The if no go reinstall with a 13.6 beta 2 and try Joori configs. If no go then off to sprint347 configs in 13.5 catalyst. Something is bound to make happen but one thing I think may be the issue now is I have a voltage locked card which seems to be a GIGABYTE hardware issue. Through some settings I was actually able to get 730/750 but was using I -20 and -g 1 with 1500 memclock and 1100 engine but was shooting up temp like no other which is imagined and turned it off when it climbed to 86 and kept going. When used -20 for -g 2 it had a 20-30 Kh/s so not sure why that is but still working through all the trials of fun :/ Will keep you all posted on the progress but progress is being made..yes! p.s. if you are buying a 7970 probably would stay away from GIGABYTE with locked voltage which kinda blows

p.s. could my 650w PSU have anything to do with it? it says 550w is needed so assuming i should be ok right? just running this one GPU and the CPU on this machine. Pure miner.

[hope2907]

I think I am ready to flash my bios but need a little help as this will be my first time doing a flash but am confident with a little guidance on the right BIOS I can make it happen. I bought a used Gigabyte HD 7970 3072MB GDDRS the other day on craigslist and have tried everything to get past 550 Kh/s via scrypt mining. When mining BTC i get around 650 Mh/s but havent played to much with that area as I am trying to get the scrypt mining down. At this point It seems I have tried almost everyones configurations on the forums and even started from ground up with the README file and still nothing above 550 Kh/s. That is also using -g 1 as when i use -g 2 it stays under 390 kh/s? I am thinking at this point my BIOS may be too old on the card as these are my current stats on my windows 7 rig:

Display device       : AMD Radeon HD 7900 Series on Tahiti GPU
Display driver       : 9.14.10.0969, Catalyst 13.4
BIOS                 : 015.022.000.004
GPU: Gigabyte HD 7970 3072MB GDDRS - GV-R797OC-3GD


Looking at http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970 there seems to be much newer BIOS versions although I am not sure which BIOS to flash with since i have a OC model and I have read that is not the best for scrypt mining hence needing to try a TO??

My current config for cgminer is :

Code:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt -w 256 -g 1 --thread-concurrency 8192 --intensity 13 --gpu-engine 1100 --gpu-memclock 1500 --gpu-fan 100 -o http://mining.usa.la.hypernova.pw:9332 -u worker.1 -p xxxxx

As I mentioned I tried -g 2 as suggested from everyone and every time it drops dramatically down to 380 Kh/s from 540 when using -g 1. When following the ReadME file for Cgminer my ThreadConcurrency speed came out to be 22400 but have read to use 8192 and see no difference in speed between the two. So at this point I am thinking a flash of the bios will be the way to go although I am still up for hearing anyones suggestions Thanks for the help in advance! this is driving me crazy..rawwr

whati is you original bios if it come with F80, you wont' be able to falsh it with 7950 f43 bios, and it won't get higher than 700 650kh/s maybe

if it come with f72 bios you can flash it with 7950 f43 bios an it can run 730khs @ 1040 1250

[hope2907]

Thanks for the advice everyone! Going to do another BIOS flash with BIOS 015.025.000.007.000000 now that I am fully comfortable doing it and then reinstall with 13.3 and try nitrogenetics configs.  The if no go reinstall with a 13.6 beta 2 and try Joori configs. If no go then off to sprint347 configs in 13.5 catalyst. Something is bound to make happen but one thing I think may be the issue now is I have a voltage locked card which seems to be a GIGABYTE hardware issue. Through some settings I was actually able to get 730/750 but was using I -20 and -g 1 with 1500 memclock and 1100 engine but was shooting up temp like no other which is imagined and turned it off when it climbed to 86 and kept going. When used -20 for -g 2 it had a 20-30 Kh/s so not sure why that is but still working through all the trials of fun :/ Will keep you all posted on the progress but progress is being made..yes! p.s. if you are buying a 7970 probably would stay away from GIGABYTE with locked voltage which kinda blows

p.s. could my 650w PSU have anything to do with it? it says 550w is needed so assuming i should be ok right? just running this one GPU and the CPU on this machine. Pure miner.

as long as there are workaround for new card, i suggest you not to buy it
not worth now

but if it have workaround, giga is best choice regardless of voltlock

[emunebtk]

I think I am ready to flash my bios but need a little help as this will be my first time doing a flash but am confident with a little guidance on the right BIOS I can make it happen. I bought a used Gigabyte HD 7970 3072MB GDDRS the other day on craigslist and have tried everything to get past 550 Kh/s via scrypt mining. When mining BTC i get around 650 Mh/s but havent played to much with that area as I am trying to get the scrypt mining down. At this point It seems I have tried almost everyones configurations on the forums and even started from ground up with the README file and still nothing above 550 Kh/s. That is also using -g 1 as when i use -g 2 it stays under 390 kh/s? I am thinking at this point my BIOS may be too old on the card as these are my current stats on my windows 7 rig:

Display device       : AMD Radeon HD 7900 Series on Tahiti GPU
Display driver       : 9.14.10.0969, Catalyst 13.4
BIOS                 : 015.022.000.004
GPU: Gigabyte HD 7970 3072MB GDDRS - GV-R797OC-3GD


Looking at http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970 there seems to be much newer BIOS versions although I am not sure which BIOS to flash with since i have a OC model and I have read that is not the best for scrypt mining hence needing to try a TO??

My current config for cgminer is :

Code:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt -w 256 -g 1 --thread-concurrency 8192 --intensity 13 --gpu-engine 1100 --gpu-memclock 1500 --gpu-fan 100 -o http://mining.usa.la.hypernova.pw:9332 -u worker.1 -p xxxxx

As I mentioned I tried -g 2 as suggested from everyone and every time it drops dramatically down to 380 Kh/s from 540 when using -g 1. When following the ReadME file for Cgminer my ThreadConcurrency speed came out to be 22400 but have read to use 8192 and see no difference in speed between the two. So at this point I am thinking a flash of the bios will be the way to go although I am still up for hearing anyones suggestions Thanks for the help in advance! this is driving me crazy..rawwr

whati is you original bios if it come with F80, you wont' be able to falsh it with 7950 f43 bios, and it won't get higher than 700 650kh/s maybe

if it come with f72 bios you can flash it with 7950 f43 bios an it can run 730khs @ 1040 1250

Not sure what F# the original Bios was but it was this : BIOS  015.022.000.004
Which do you recommend me going to in the end? and do you possibly have a link so I can flash that now before going forward?
I found this link but do not see a F43 : http://www.gigabyte.com/products/product-page.aspx?pid=4102#bios
I see a F3, F72, F41_A and f2.

There is also this link with more Gigabyet cards. I do have the r79703GD model

http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970

Basically it looks like i kind of have two options in Bios picking..a 1100/1500 or 1000/1375...any ideas on which would be the best to continue my testing? Thanks!!

[FiiNALiZE]

Your PSU is more than enough.

A 7970 draws 350W max OC'd.

[emunebtk]

Your PSU is more than enough.

A 7970 draws 350W max OC'd.

Thank you! thought that was the case but wanted to double check so that variable wouldn't be added to the 15678,000 others i am dealing with  thanks!

My GV-R797OC-3GD rev 2.1 gets about 720Kh/s with the following

Code:

cgminer.exe --scrypt -o stratum+tcp://xxxx:xxx -u xxxx -p xxxx --intensity 13 -g 2 --thread-concurrency 8192 --lookup-gap 2 --gpu-engine 1042 --gpu-memclock 1500

Catalyst 13.3
BIOS 015.025.000.007.000000
GPU_MAX_ALLOC_PERCENT unset

Hope that helps

What SDK version are you running btw? and are you on 13.3 beta 3? Installing that now with SDk pkg installed and everything in it but thinking I should reinstall and uncheck SDK and then install 2.7?

[emunebtk]

BIG UPDATE!!!!  Installed 13.3 and it did nothing actually made the hash rate spike all over the place in a 2-40 kh/s range. I uninstalled then installed 13.6 beta 2 drivers.

I chose this config to start and it jumped to 750 and hit even 780!!!  :

Code:

--gpu-engine 1100 --gpu-memclock 1500 --thread-concurrency 8192 -g 2 -w 256 -I 13

a few minutes later screen went black and computer crashed :/  Brought engine down to 1045 and memclock to 1450 and am running at 730 kh/s at about 81temp at the moment. Just started it though a few minutes ago. Atlas 13.6 and the updated BIOS did some magic trick and can now play with the rest to see what doesnt crash the GPU. Thanks guys!!!!

[broken_pixel]

never buy gigabyte cards

Gigalock

[Joori]

never buy gigabyte cards

Gigalock

The voltage lock shouldn't be an issue mine are locked and I still got them hashing over 700Kh/s. Infact, they're doing 770Kh/s each atm and sitting between 65-75C. It was a pain in the arse to get them to play nice but persistence is the key to virtue - also an open rig setup for proper cooling and the right command line helped massively. See below for imagery!

Sexy Image of Rig

Miner Monitor Stats

BIG UPDATE!!!!  Installed 13.3 and it did nothing actually made the hash rate spike all over the place in a 2-40 kh/s range. I uninstalled then installed 13.6 beta 2 drivers.

I chose this config to start and it jumped to 750 and hit even 780!!!  :

Code:

--gpu-engine 1100 --gpu-memclock 1500 --thread-concurrency 8192 -g 2 -w 256 -I 13

a few minutes later screen went black and computer crashed :/  Brought engine down to 1045 and memclock to 1450 and am running at 730 kh/s at about 81temp at the moment. Just started it though a few minutes ago. Atlas 13.6 and the updated BIOS did some magic trick and can now play with the rest to see what doesnt crash the GPU. Thanks guys!!!!

Awesome stuff mate, stoked you got there in the end haha you see, no need to have 346423874623 options on CGMiner startup. A simple clean command line and the help of a BIOS flash coupled with latest drivers (bleeding edge too!) got you there in the end. Beta drivers ftw!! Just curiously what was the temp before the screen went black? It probably shut down cause it overheated I'm thinking. They really do run rather hot and require decent cooling to keep them stable and free from burning out. Those pesky VRM's have piss poor cooling on their own and I had to move the entire setup out from an open case onto a rack with adequate spacing just to keep the temps down :\

Really happy you got things going in the end

[emunebtk]

never buy gigabyte cards

Gigalock

The voltage lock shouldn't be an issue mine are locked and I still got them hashing over 700Kh/s. Infact, they're doing 770Kh/s each atm and sitting between 65-75C. It was a pain in the arse to get them to play nice but persistence is the key to virtue - also an open rig setup for proper cooling and the right command line helped massively. See below for imagery!

Sexy Image of Rig

Miner Monitor Stats

BIG UPDATE!!!!  Installed 13.3 and it did nothing actually made the hash rate spike all over the place in a 2-40 kh/s range. I uninstalled then installed 13.6 beta 2 drivers.

I chose this config to start and it jumped to 750 and hit even 780!!!  :

Code:

--gpu-engine 1100 --gpu-memclock 1500 --thread-concurrency 8192 -g 2 -w 256 -I 13

a few minutes later screen went black and computer crashed :/  Brought engine down to 1045 and memclock to 1450 and am running at 730 kh/s at about 81temp at the moment. Just started it though a few minutes ago. Atlas 13.6 and the updated BIOS did some magic trick and can now play with the rest to see what doesnt crash the GPU. Thanks guys!!!!

Awesome stuff mate, stoked you got there in the end haha you see, no need to have 346423874623 options on CGMiner startup. A simple clean command line and the help of a BIOS flash coupled with latest drivers (bleeding edge too!) got you there in the end. Beta drivers ftw!! Just curiously what was the temp before the screen went black? It probably shut down cause it overheated I'm thinking. They really do run rather hot and require decent cooling to keep them stable and free from burning out. Those pesky VRM's have piss poor cooling on their own and I had to move the entire setup out from an open case onto a rack with adequate spacing just to keep the temps down :\

Really happy you got things going in the end

At the moment running at around 83-85 the screen seems to go black and computer freezes so its not going to crazy to shut it off right? Had to run out for a bit and let it go with a 1050/1500 on 22400 TC and came back to a crashed computer so that is where I am at now. During some testing yesterday I was able to get it to 730kh/s but that was with -I 20 and it ran past 87temp so I shut it down and scratched that config. I think right now I am going to start back from square one with the readme on these drivers and see what I get. So close I can taste it!

edit*update*: Went through the readme again and didn't have much luck as everything kept blacking out or freezing. I came up with a TC of 22400 again then messed memclock and started crashing GPU at 1650 so brought it down to 1625 and started engine speed of 925(around .56) as suggested which started with a 480 kh/s. Slowly worked my way up then around 970 with a 530 kh/s speed it crashed again. At the moment anything I seem to try brings the computer to a black then freeze. I even tried going from 1375 clock and 1000 engine which were defaults for MSI afterburner and yet crash again. So now I can get the speed but always going to black screen? Would that be 13.6 beta 2 drivers bugging out or is that something with my clock and engine ratio? confused yet again but looking up!

[nitrogenetics]

My GV-R797OC-3GD rev 2.1 gets about 720Kh/s with the following

Code:

cgminer.exe --scrypt -o stratum+tcp://xxxx:xxx -u xxxx -p xxxx --intensity 13 -g 2 --thread-concurrency 8192 --lookup-gap 2 --gpu-engine 1042 --gpu-memclock 1500

Catalyst 13.3
BIOS 015.025.000.007.000000
GPU_MAX_ALLOC_PERCENT unset

Hope that helps

What SDK version are you running btw? and are you on 13.3 beta 3? Installing that now with SDk pkg installed and everything in it but thinking I should reinstall and uncheck SDK and then install 2.7?

I'm running driver's included sdk. I just checked 13.6b2 and they seem to be a little better than 13.3 (doing around 730Kh/s @1042/1500).
My preferred clock ratios are
1042/1500 ~730Kh/s
995/1250 ~690Kh/s

[emunebtk]

My GV-R797OC-3GD rev 2.1 gets about 720Kh/s with the following

Code:

cgminer.exe --scrypt -o stratum+tcp://xxxx:xxx -u xxxx -p xxxx --intensity 13 -g 2 --thread-concurrency 8192 --lookup-gap 2 --gpu-engine 1042 --gpu-memclock 1500

Catalyst 13.3
BIOS 015.025.000.007.000000
GPU_MAX_ALLOC_PERCENT unset

Hope that helps

What SDK version are you running btw? and are you on 13.3 beta 3? Installing that now with SDk pkg installed and everything in it but thinking I should reinstall and uncheck SDK and then install 2.7?

I'm running driver's included sdk. I just checked 13.6b2 and they seem to be a little better than 13.3 (doing around 730Kh/s @1042/1500).
My preferred clock ratios are
1042/1500 ~730Kh/s
995/1250 ~690Kh/s

Thanks for the update! Seems to be when I use the default clock 1375 i cannot go past 940 on engine speed as I seem to go black then crash after a few minutes after..running stable right now a new config I am trying with tc 8192 and 925/1000 and getting 650 khs. Wont be happy till i am stable at 700+ so will keep trying. Maybe your 995/1250 will bump me up a bit. Will be in touch and thanks again!

[sprint347]

I think I am ready to flash my bios but need a little help as this will be my first time doing a flash but am confident with a little guidance on the right BIOS I can make it happen. I bought a used Gigabyte HD 7970 3072MB GDDRS the other day on craigslist and have tried everything to get past 550 Kh/s via scrypt mining. When mining BTC i get around 650 Mh/s but havent played to much with that area as I am trying to get the scrypt mining down. At this point It seems I have tried almost everyones configurations on the forums and even started from ground up with the README file and still nothing above 550 Kh/s. That is also using -g 1 as when i use -g 2 it stays under 390 kh/s? I am thinking at this point my BIOS may be too old on the card as these are my current stats on my windows 7 rig:

Display device       : AMD Radeon HD 7900 Series on Tahiti GPU
Display driver       : 9.14.10.0969, Catalyst 13.4
BIOS                 : 015.022.000.004
GPU: Gigabyte HD 7970 3072MB GDDRS - GV-R797OC-3GD


Looking at http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970 there seems to be much newer BIOS versions although I am not sure which BIOS to flash with since i have a OC model and I have read that is not the best for scrypt mining hence needing to try a TO??

My current config for cgminer is :

Code:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt -w 256 -g 1 --thread-concurrency 8192 --intensity 13 --gpu-engine 1100 --gpu-memclock 1500 --gpu-fan 100 -o http://mining.usa.la.hypernova.pw:9332 -u worker.1 -p xxxxx

As I mentioned I tried -g 2 as suggested from everyone and every time it drops dramatically down to 380 Kh/s from 540 when using -g 1. When following the ReadME file for Cgminer my ThreadConcurrency speed came out to be 22400 but have read to use 8192 and see no difference in speed between the two. So at this point I am thinking a flash of the bios will be the way to go although I am still up for hearing anyones suggestions Thanks for the help in advance! this is driving me crazy..rawwr

My GV-R797OC-3GD rev 2.1 gets about 720Kh/s with the following

Code:

cgminer.exe --scrypt -o stratum+tcp://xxxx:xxx -u xxxx -p xxxx --intensity 13 -g 2 --thread-concurrency 8192 --lookup-gap 2 --gpu-engine 1042 --gpu-memclock 1500

Catalyst 13.3
BIOS 015.025.000.007.000000
GPU_MAX_ALLOC_PERCENT unset

Hope that helps

This command is getting me 720khash on the same card/rev.

Thanks for sharing

[hope2907]

I think I am ready to flash my bios but need a little help as this will be my first time doing a flash but am confident with a little guidance on the right BIOS I can make it happen. I bought a used Gigabyte HD 7970 3072MB GDDRS the other day on craigslist and have tried everything to get past 550 Kh/s via scrypt mining. When mining BTC i get around 650 Mh/s but havent played to much with that area as I am trying to get the scrypt mining down. At this point It seems I have tried almost everyones configurations on the forums and even started from ground up with the README file and still nothing above 550 Kh/s. That is also using -g 1 as when i use -g 2 it stays under 390 kh/s? I am thinking at this point my BIOS may be too old on the card as these are my current stats on my windows 7 rig:

Display device       : AMD Radeon HD 7900 Series on Tahiti GPU
Display driver       : 9.14.10.0969, Catalyst 13.4
BIOS                 : 015.022.000.004
GPU: Gigabyte HD 7970 3072MB GDDRS - GV-R797OC-3GD


Looking at http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970 there seems to be much newer BIOS versions although I am not sure which BIOS to flash with since i have a OC model and I have read that is not the best for scrypt mining hence needing to try a TO??

My current config for cgminer is :

Code:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt -w 256 -g 1 --thread-concurrency 8192 --intensity 13 --gpu-engine 1100 --gpu-memclock 1500 --gpu-fan 100 -o http://mining.usa.la.hypernova.pw:9332 -u worker.1 -p xxxxx

As I mentioned I tried -g 2 as suggested from everyone and every time it drops dramatically down to 380 Kh/s from 540 when using -g 1. When following the ReadME file for Cgminer my ThreadConcurrency speed came out to be 22400 but have read to use 8192 and see no difference in speed between the two. So at this point I am thinking a flash of the bios will be the way to go although I am still up for hearing anyones suggestions Thanks for the help in advance! this is driving me crazy..rawwr

whati is you original bios if it come with F80, you wont' be able to falsh it with 7950 f43 bios, and it won't get higher than 700 650kh/s maybe

if it come with f72 bios you can flash it with 7950 f43 bios an it can run 730khs @ 1040 1250

Not sure what F# the original Bios was but it was this : BIOS  015.022.000.004
Which do you recommend me going to in the end? and do you possibly have a link so I can flash that now before going forward?
I found this link but do not see a F43 : http://www.gigabyte.com/products/product-page.aspx?pid=4102#bios
I see a F3, F72, F41_A and f2.

There is also this link with more Gigabyet cards. I do have the r79703GD model

http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970

Basically it looks like i kind of have two options in Bios picking..a 1100/1500 or 1000/1375...any ideas on which would be the best to continue my testing? Thanks!!

it is 7950 bios
to check f# use gigabyte utility

[emunebtk]

I think I am ready to flash my bios but need a little help as this will be my first time doing a flash but am confident with a little guidance on the right BIOS I can make it happen. I bought a used Gigabyte HD 7970 3072MB GDDRS the other day on craigslist and have tried everything to get past 550 Kh/s via scrypt mining. When mining BTC i get around 650 Mh/s but havent played to much with that area as I am trying to get the scrypt mining down. At this point It seems I have tried almost everyones configurations on the forums and even started from ground up with the README file and still nothing above 550 Kh/s. That is also using -g 1 as when i use -g 2 it stays under 390 kh/s? I am thinking at this point my BIOS may be too old on the card as these are my current stats on my windows 7 rig:

Display device       : AMD Radeon HD 7900 Series on Tahiti GPU
Display driver       : 9.14.10.0969, Catalyst 13.4
BIOS                 : 015.022.000.004
GPU: Gigabyte HD 7970 3072MB GDDRS - GV-R797OC-3GD


Looking at http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970 there seems to be much newer BIOS versions although I am not sure which BIOS to flash with since i have a OC model and I have read that is not the best for scrypt mining hence needing to try a TO??

My current config for cgminer is :

Code:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt -w 256 -g 1 --thread-concurrency 8192 --intensity 13 --gpu-engine 1100 --gpu-memclock 1500 --gpu-fan 100 -o http://mining.usa.la.hypernova.pw:9332 -u worker.1 -p xxxxx

As I mentioned I tried -g 2 as suggested from everyone and every time it drops dramatically down to 380 Kh/s from 540 when using -g 1. When following the ReadME file for Cgminer my ThreadConcurrency speed came out to be 22400 but have read to use 8192 and see no difference in speed between the two. So at this point I am thinking a flash of the bios will be the way to go although I am still up for hearing anyones suggestions Thanks for the help in advance! this is driving me crazy..rawwr

whati is you original bios if it come with F80, you wont' be able to falsh it with 7950 f43 bios, and it won't get higher than 700 650kh/s maybe

if it come with f72 bios you can flash it with 7950 f43 bios an it can run 730khs @ 1040 1250

Not sure what F# the original Bios was but it was this : BIOS  015.022.000.004
Which do you recommend me going to in the end? and do you possibly have a link so I can flash that now before going forward?
I found this link but do not see a F43 : http://www.gigabyte.com/products/product-page.aspx?pid=4102#bios
I see a F3, F72, F41_A and f2.

There is also this link with more Gigabyet cards. I do have the r79703GD model

http://www.techpowerup.com/vgabios/index.php?manufacturer=Gigabyte&model=HD+7970

Basically it looks like i kind of have two options in Bios picking..a 1100/1500 or 1000/1375...any ideas on which would be the best to continue my testing? Thanks!!

it is 7950 bios
to check f# use gigabyte utility

so for a 7970 then a F43 bios is a no go? right now i am running stable at 640 kh/s with a 925/1000 but running temp at around 83/84 so higher then i would like. Anything above a 940 engine seems to go black screen. Going to do some more testing tonight and keep the good fight coming..at least i am out of the 500's now..yes!

[emunebtk]

Out of curiosity what is everyone's default GPUengine/Memclock for their 7970 especially those running with a 1000+/1500 speeds?

The BIOS i flashed to has a 1000/1375 so I am now curious If I should of flashed to the BIOS with a 1100/1500 as anything past a 940 engine seems to crash with a black screen. Currently though I am running stable at 640 kh/s with 82/83 temp using 910/1000 and tc8192 which seems to be the best I can currently achieve. Going for that 700plus goal!

[DonDe]

Hey, so I use F62 bios, it has 1100/1500 default clocks. I clocked it at 1085 and 1500 to get constant stable 760 khs

[DonDe]

BTW OC is the same as TO - rev 2.1 board, just different bios. You can force flash your OC to TO using atiflash -f command.

[emunebtk]

BTW OC is the same as TO - rev 2.1 board, just different bios. You can force flash your OC to TO using atiflash -f command.

bam! thanks man just flashed to that new F62 BIOS(http://www.techpowerup.com/vgabios/131592/gigabyte-hd7970-3072-121214.html) which was a TO not really knowing the difference I took a chance seeing the default speeds much higher than a OC bios. I tried 1100/1500 which shot to 760plus!!! then crashed to black Do you crash at 1100? For the night I put it back to 910/1375 and running stable at 640 with a 79temp now instead of 83 before at 1000/1375 OC bios. Going to mess with it more tomorrow so thank you for the confirmation that I am on the right track with going to TO. More trials to come..thanks again!

[Joori]

Out of curiosity what is everyone's default GPUengine/Memclock for their 7970 especially those running with a 1000+/1500 speeds?

The BIOS i flashed to has a 1000/1375 so I am now curious If I should of flashed to the BIOS with a 1100/1500 as anything past a 940 engine seems to crash with a black screen. Currently though I am running stable at 640 kh/s with 82/83 temp using 910/1000 and tc8192 which seems to be the best I can currently achieve. Going for that 700plus goal!

With the F62 bios already on my cards, my GPU/Memclocks are 1100/1500 and that's what I mine with. Any more or less on either GPU or Memclock and my hashrate drops significantly, like ~100kh/s drop! Currently they're both hovering a little over 770kh/s and temps are 70C/62C respectively as I type this. Rock solid for days now no issues with screen freeze or anything. Open rig was the key for me to keep the temps down.. well that and risers to get more air flowing around them both. Very pleased with the outcome considering the top card (when they were in a pc case on it's side and case open) was hitting above 100C easily while the bottom card was climbing slowly above 90C. These temps were unacceptable and I did not mine untill I had them in their current setup. Even when they hit 80C on a hot day (it's rather chilly outside atm so room is a few deg above that) I still cringe and worry about them while I'm at work. But I remote monitor their progress and so far so good... fingers crossed