7990 Tahiti setup / voltage?

[massnerder]

I have a Sapphire 7990 (Tahiti) and I am having some trouble getting it hashing just right.

I have win7/cgminer 3.1.1/ catalyst 13.4

I have searched and read as much as I could find on this card and nothing seems to work for me.  Right now I am hashing at 1.1MH/s scrypt with core 1040 mem 1625 & i=16.  I have it inside an azza solano case with one extra fan for a total of 3x 140mm intake fans covering the front panel, 1x 120mm fan exhaust on rear, 1x 230mm exhaust on top, and one 230mm side window fan that I flipped to exhaust.  I set the top exhaust to low to maintain positive pressure in my case and flipped the window fan around to pull out extra hot air that the card puts out into the case faster, since it is right at the card it pulls a lot more heat out this way.  I have ran it with the case open and have no difference so I think my fan setup is good.

My problem is that the temps are getting much higher than I would like.  I run my miner and temps are up into the low 90's on gpu0 within 15-20 minutes.  GPU1 gets hot too but usually stays in low 80's.  I have seen reports of others with these cards hashing at around 80 and lower.  Also seen higher hashrates posted.  I know undervolting can probably solve the heat issue and maybe let me hash faster, but I can't seem to change the voltage.

I have read what I can find about these and I have already edited my registry to disable ulps (so I can change the voltage) and tried disabling it with trixx and AB with no luck.  Others seem to be having luck just editing the registry but cgminer still shows my card(s) running at 1.2v.  Is there anyone with experience on this card that can tell me how to set my voltage lower and get my temps down?

[massnerder]

nevermind 

among the solutions out there (customize lots of cfg files in msi, edit registry, use this version, that version, uninstall catalyst so it won't overrride voltage settings with AB, use this script to disable ulps, etc....) was the only one that worked for me after all.

simple as put atipdlxx.dll into the AB folder    cgminer still reads it as stock voltage, but it's running cooler and faster, so until I dig up the kill-a-watt I'm gonna assume it worked 

now hashing scrypt and for those having trouble with the 7990 I get avg. 1.325mh/s with core 1050 mem 1675 voltage 1.1 thread conc 24000 i 20 shaders 2048 worksize 256 vectors 1 g 2

has been up and stable for over 30 minutes, so just gonna watch and keep my fingers crossed at this point....  temps are holding steady at low 80s/mid 70s.  would be nice to have them both at 75 but I will take what I can get 

[barwizi]

did you buy the card as a gamer, maybe for work? or did you buy it for mining?

[massnerder]

Both as a gamer and for mining.  I have a open air rig full of 7950s, but I wanted to build a nice gaming rig that could be mining most of the time when I'm not playing.  Since it is a gaming machine it had to be semi nice, be able to stay closed, etc.  My thinking was that since it is 2 cards on one physical slot, it's the only way I can make a 4 card system fit nicely into a case.   

It was a huge pain in the ass to set up compared to my 7950s but I'm pretty happy with it now.  Just need a second one

[barwizi]

had the same dilemma opted for 7950 still since it seems i get high average hash rate when i use the same card. 7990 though, nice!! would love to try one out for DMC and Saints row. 

[massnerder]

yea, now that it is hashing properly I am downloading the included games and getting ready for that.  if I add a second one it should outperform my 4x 7950 rig and still be nice and contained inside a closed case ...  the only thing I don't like about my 7950 rig is that it has to be open air

adjusted voltage to 1.08, temps are down to 80/73

Anybody working with this card have anything to add?  dare I try 1.05?? 

[thcst8]

thinking about getting a 7990 now

[massnerder]

It's great for what it is... 2 cards on one slot.  But because those 2 cards are automatically crossfired together it becomes a huge pain to disable the power management and make them clock/hash the way you want them to.  There are several methods to make it work and everybody seems to have different rates of success with the different methods.  Like I said, now that it works, I am happy    but getting there was no fun.  On the flipside, because I had to do all that I should be able to crossfire in the next card, if I add a second one, and I will be all set for both gaming and mining with no need to switch configurations or cables.  My case has one empty fan slot left which I will probably need to use and just hope that the whole thing will stay cool enough while closed.  Cross that bridge when we get there I guess, gotta mine for a while before I can get a second card   Overall I would recommend it though, especially for part time gaming since it comes with 8 games.

Just don't buy them all up before I can get my second one! 

[thcst8]

are you still stable at 1.325mh/s?

[massnerder]

not exactly.  I was changing my settings bit by bit to see what I could do and it kept locking up on me.  doesn't look like I can get any more out of it. I did have it up over 1.4 but it was not at all stable and 1.35mhs but it would run fine for a few hours then crash which I thought was weird.... so no, I'm still working out all the kinks but I think my original numbers were pretty close

[thcst8]

cool.  I just ordered my 7990 

I will also be doing a lot of tweaking so maybe we can work on this as a team.

[massnerder]

yea, just let me know if you need a hand, i can probably dig some useful links out of my history.

basically, you will install catalyst / drivers and msi AB latest BETA.  reboot. open regedit and search for enableulps then change every value you find to 0.  it takes a while, just keep cycling thru (F3) and changing until regedit tells you it found them all.  then make sure AB is closed and go find that atipdlxx.dll.  put it in the AB program folder.  reboot. now you (hopefully) can change the voltage on your card with AB.

there are other methods but of course the last one i try is the only one that worked for me. ymmv 

i have seen people post hashrates up in the high 1400's kh/s, but mostly 12-1300's.... as we know all cards are different so let me know what you can get out of yours.

as of right now I am hashing with the above posted settings, voltage 1.08, g 1, core 1050 mem 1675, avg 1.333mh/s, temps 83/74, running for over 4 hours now.  if i try to bump the mem clock to 1700 it works fine for a while at 1.35mh/s and locks up after an hour or 2, even at voltage 1.1, so I guess I am squeezing all I can out of this one.

[thcst8]

mass what are you cgminer settings?

cgminer --shaders 2048 --thread-concurrency 8192 -I 13 -g 2 -w 256

[massnerder]

shaders 2048 thread concurrency 24000 g 2 w 256 i 20

i have seen a lot of people suggesting 8192 but i get hw errors with it

[massnerder]

word of warning...  setting up mining was the first thing i did with my new setup.  after that i started setting up my steam account and downloading in my games.  the game installations changed my registry back to enabled ulps.  so i had to cycle thru the registry again and change all those back to zero in order to mine again.  if you install a game be sure to double check your registry before mining

[ronaldinho_07]

shaders 2048 thread concurrency 24000 g 2 w 256 i 20

i have seen a lot of people suggesting 8192 but i get hw errors with it

-I 13 tc 8192 -g 2 that's all you need
i dont know what the f*ck is going on...on techpowerup,guru3d..and all the others site,power consumption of 7990 is about 350-380W
but when we tested 7990 with scrypt mining,the real power consumption was ~ 1050W (at 1.08volt,speed 720khash per core) ...
it's ridiculous because ref 7990 has 2 8pins =300w,pci-e = 75W....

 

[massnerder]

shaders 2048 thread concurrency 24000 g 2 w 256 i 20

i have seen a lot of people suggesting 8192 but i get hw errors with it

-I 13 tc 8192 -g 2 that's all you need
i dont know what the f*ck is going on...on techpowerup,guru3d..and all the others site,power consumption of 7990 is about 350-380W
but when we tested 7990 with scrypt mining,the real power consumption was ~ 1050W (at 1.08volt,speed 720khash per core) ...
it's ridiculous because ref 7990 has 2 8pins =300w,pci-e = 75W....

 

i tried those same settings...  hw errors for me at 8192 tc no matter what the intensity / clock speeds or other settings... weird.

that power consumption can't be right.  i am running mine on a 1000w psu with an 8 core cpu, 32gb ram, wifi, and a 1tb hdd.  if the card alone were pulling that much power the system wouldn't be stable.  guess i better plug it into the killawatt and see what my system really pulls while mining.  some of the reviews i read put this card at 500w under load, i'll post back with my readings in a bit 

[ronaldinho_07]

shaders 2048 thread concurrency 24000 g 2 w 256 i 20

i have seen a lot of people suggesting 8192 but i get hw errors with it

-I 13 tc 8192 -g 2 that's all you need
i dont know what the f*ck is going on...on techpowerup,guru3d..and all the others site,power consumption of 7990 is about 350-380W
but when we tested 7990 with scrypt mining,the real power consumption was ~ 1050W (at 1.08volt,speed 720khash per core) ...
it's ridiculous because ref 7990 has 2 8pins =300w,pci-e = 75W....

 

i tried those same settings...  hw errors for me at 8192 tc no matter what the intensity / clock speeds or other settings... weird.

that power consumption can't be right.  i am running mine on a 1000w psu with an 8 core cpu, 32gb ram, wifi, and a 1tb hdd.  if the card alone were pulling that much power the system wouldn't be stable.  guess i better plug it into the killawatt and see what my system really pulls while mining.  some of the reviews i read put this card at 500w under load, i'll post back with my readings in a bit 

hmm...have you tried to reinstall your windows yet ?
Install Windows 7 or 8 (32/64bit,up to you) --> 13.1 CCC (you only need to install sdk and driver) ->start cgminer with those settings
if possible,you can give me your Teamviwer ID,i will config 4u
//~ 1050W for 2 7970 at wall

[massnerder]

win7 64 bit / 13.4 ccc...  i have tried a few different driver versions without much difference, not sure if i did 13.1 though.  new system installed windows less than a week ago    I can always go back and give 13.1 a try to make sure though.

i know this is 2x 7970 on one board, but it's not quite the same as 2x actual 7970.  my killawatt reads about 230w at startup, 150w idle, and is bouncing around between 600-620w while mining.  so the card is definitely pulling less than 500w...  maybe 400-450w? not sure how i can test the card independently of the rest of the system.  it looks like i will need to go with a new psu if i add another 7990, but i knew i probably would anyway.

(edit)  just for reference, my 4x 7950 system pulls about 1.1kw and hashes at twice the speed of this 7990.... so it is right about where i was guessing it would be

[thcst8]

@mass another dumb question how do you know you have "Sapphire 7990 (Tahiti)"?  I thought both GPU's were tahiti but the combined board and GPU is called Malta.

Also why do you use "cgminer 3.1.1/ catalyst 13.4" I think i have cgminer 3.4/catalyst 13.8".

Should I downgrade?

I'm asking because I can't really stabilize this card and I've tried several settings.