@TheQueen74 No dont be like that! you were helpful! and thanks for your suggestions, We never know what might fix a problem until you have tried them all


@ Wipeout2097 Thanks again and i did donate 2000 doge to TheStilt as soon as he helped me out yesterday. Your right he is a awesome person!!

you sir have saved me!!! thanks to The Stilt I now have a modded bios and Im getting 749kh/s!!! I doubt I would have found that post without your help! if you want some dogecoin sent your way send me your address

Hmm very interesting...... I flashed the 280x bios and the card works fine but...... im having some problems with the drivers   . I installed the exact amd drivers he mentioned and AMD catalyst just says failed to load drivers. If i switch back to stock bios AMD catalyst starts and works as normal. I have a 2nd PC I might chuck the card in that and see what happens


EDIT: tried the card in my 2nd pc, exact same problem. without any drivers it boots to windows fine, but after installing AMD drivers it blue screen's on boot.


x2 EDIT: found this fourm http://www.overclock.net/t/1433293/flash-7970-to-r9-280x-bios/80     seems im not alone with this problem and it seems that a reference 7970 cant be flash with a 280x bios, If you have a non reference 7970 then you can flash a 280x bios....... and yes i have a reference 7970 

Thanks..... i tried flashing the bios you mentioned, flashed successfully in DOS. But the card doesn't like the bios and failed to boot. So i flashed the stock bios back. Can you suggest another bios to try?

as stated in first post "as soon as I change any of the following my kh/s drops alot.........higher intensity"



and yes you are right. I have another mining pc with a 7950, and I run it at I 19. and as you mentioned we are talking about a 7970, and it doesnt like anything above I 13

my bios is 015.012.000.004.000346  if you can recommend a particular bios i should try let me know. and i will try flashing it using a bootable usb stick, atiwinflash has worked in the past for me. but maybe i got lucky? cant brick my cards dual bios 

Ive tried flashing 2 different bios's on my 7970, both failed to even boot after. so ive just flashed the stock bios back for now. TheQueen74 why cant I use atiwinflash to flash bios???

as i said in the first post the card isnt getting hot.




thanks for your help!! My card is a sapphire 7970 (stock cooler) exact model is above in another post, Yes i have flashed bios, only a week ago i flashed another card of mine (a 7950) made a noticeable improvement. Ill give it a shot and report back

PN: 299-1E208-000SA  and SKU#21197-00

in GPU-Z is says REV: N/A so i guess its 1.0???  Many thanks in advance for help!!

the -g command sets how many threads are used, and the results from 1 and 2 threads are above, I have tried many different TC settings,the best for my setup are 8192 and 20400. lookup gap 2 is the highest performance and thats what ive set it to. stock voltage

tried sgminer 4.0, gives the same exact performance as cgminer with my setup. With a TC of 8192 im able to push the mem clock to 1500 stable. and engine clock to 1125, I havent found any 'sweet spots' when overclocking (5mhz increments). increasing the intensity over 13 results in lower khs and HW errors. Increasing the TC above 8192 lowers my khs until i hit a TC of 20400

with a TC of 8192, 1500mem and 1125 gpu im getting 595khs, (all other settings are same as in first post)


I tried your settings, im getting around 550khs with an intensity of 14, I 13 is around the 450 khs. (first time i have ever seen an increase in khs with an intensity above 13) I 15 gives HW errors

the pool i was with just closed. im looking for a new pool


DU9oaoyNT9foTN2b4aXoFEh5X82pY96nH5

Hey guys,
I have a sapphire 7970 and I just cant get this thing above 600kh/s    Ive tried everything i can think of. First person that suggests something that gets my 7970 over 650kh/s ill give you 1000 dogecoins!!  

I know this card has more to give, whenever ive tuned other cards to their max you start to notice abit of system lag, but Ive never experienced any lag with my 7970.

as soon as I change any of the following my kh/s drops alot.
higher thread concurrency,
lower thread concurrency,
more than 1 thread,
higher intensity,
lower intensity,
increase memory clock,
increase gpu clock,

temps are always good and VRM's arent getting hot either

im using CGminer 3.7.2 on windows 7 x64 sp1

currant settings:
"intensity" : "13",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "20400",
"shaders" : "0",
"gpu-engine" : "1150",
"gpu-fan" : "65-65",
"gpu-memclock" : "1375",
"gpu-memdiff" : "0",
"gpu-powertune" : "20",
"gpu-vddc" : "0.000",
"temp-cutoff" : "92",
"temp-overheat" : "86",
"temp-target" : "80",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"





Any help tuning this would be much appreciated!!!  

So ive tried everything in the book, from a lower mem clock to engine clock, to around the 1.57~1.6 ratio, multiple threads, single thread, higher & lower intensity, I even tried a modded bios, you name it ive tried it.

interestingly increasing the memory speed doesnt increase kh/s at all. stock is 1250mhz and ive taken it to 1500mhz....... 0kh/s difference

My best and final settings for the 7950:
core 1140mhz @1.125v
mem 1250mhz
intensity 20
single thread
TC of 44500

Im getting around the 590~600khs in cgminer, 2 independent mining pools say im getting between 650~750khs. Im not certain what one to believe.

Now Ill have to see if I can squeeze anymore from my 7970..............................

after trying "gsupp's" settings im getting a stable 580khs, only run for a few mins, but looks like im on the right track, I think the 7970 is going to be even more difficult to tune tho

EDIT: only settings I change from gsupp's setup was 1250mhz mem and 1100mhz gpu. my 7950 really doesnt like going over 1250mhz ram for mining

getting 590khs with these settings

"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "0",
"thread-concurrency" : "40960",
"shaders" : "0",
"gpu-engine" : "1100",
"gpu-fan" : "65-65",
"gpu-memclock" : "1250",
"gpu-memdiff" : "0",
"gpu-powertune" : "20",
"gpu-vddc" : "1.175",
"temp-cutoff" : "92",
"temp-overheat" : "86",
"temp-target" : "80",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"

i have the vapor X to, temps stay below 80c.  my 7950 is housed in a CoolerMaster HAF case with 3x 250mm fans and 2x140mm fans. so I wouldn't expect my card is getting overly hot in there. the 7970 is completely in the open (free air) and stays pretty cool. Ill try your settings and report the results. thanks for help!

tried a TC of 14336 at I 20, starts giving HW errors. Ive been playing around with the setup for the last 4 hrs, the best ive got so far is 560 on I 18 and a TC of 20400. Interestingly using a TC of either 20399 or 20401 lowers my hash rate by 40khs.

stock voltage on both cards
7950 1.075
7970 1.175

Got the 7970 to 591khs with the same TC as the 7950 (TC 20400), I find that unusual.  the 7970 does not like running more than 1 thread, and only runs on intensity 13, more or less intensity regardless of other setting always results in a poor hash rate so far.

This is going to make me crazy!!! XD

both cards are sapphire, increasing the memory + or - by even 5mhz results in lower kh/s with the 7950, similar problem with the 7970, intensity 13 is the sweet spot with the settings im running at the moment.

Hi and thanks for taking the time to view my post  

I'm having some difficulty getting both my gfx cards fine tuned with cgminer, And after 2 days searching the internet for an answer Im at my wits end....... I have a dedicated 24/7 mining rig with a 7970, and my pc has a 7950. In cgminer im getting 585khs with the 7970 and 540khs with the 7950. I have tried using thread concurrency in my bat files 22400, 24000.etc (cgminer bin file uses 22400 TC) , but it always results in a lower hash rate than using the shaders command.

7950
setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt  -o*********************** -I 13 -w 256 --shaders 1792 -g 2 --gpu-engine 1100 --gpu-fan 65 --gpu-memclock 1250 --gpu-powertune 20 --temp-cutoff 92 --temp-overheat 86 --temp-target 80

7970
setx GPU_MAX_ALLOC_PERCENT 100
cgminer --scrypt  -o *********************** -I 13 -w 256 --shaders 2048 --gpu-engine 1125 --gpu-fan 65 --gpu-memclock 1375 --gpu-powertune 20 --temp-cutoff 92 --temp-overheat 86 --temp-target 80

using cgminer 3.7.2 version


If i increase the intensity it just results in HW errors. Ive tried lowing the mem clock 150mhz below the engine clock, gives a slightly lower hash rate.

Many thanks in advance for help!!


EDIT: 7950 found a TC that doesnt lower my hash rate (around 10~20+kh/s) of 8960