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Topic: 6990 Mining Blues (Read 1687 times)

newbie
Activity: 9
Merit: 0
September 28, 2012, 09:15:34 AM
#26
Thanks for the advice, but temps are no longer an issue. Just need to find how to underclock memory, managed to underclock one core down to 750 (lowest it would go) but not the others. Tried to underclock them independently and synchronized, in both cases only one core underclocks (same core in both cases)
full member
Activity: 246
Merit: 100
September 28, 2012, 09:04:56 AM
#25
are you using msi afterburner?
what driver set you have?

and as to  the heat, I called msi, this cards have been rated up to 99c.. ive tried undervolting but it acts up. my hotest gpu is about 96-98c im over clocked to 915 ram at 625 and with a fan mine mine 24/7 no problems.

...Call us in a month and let us know if they're broken  Cheesy

If that is the case I should have called almost a year ago, The cards run like a champ..

This is a problem I did expiernce though. On the computer I am using right now I have a 6990 running as a slave mining, It sould not pull enough cool air becuase it was right above PSU, I put a small 5inch fan in front of it and it solved my problems. The card would mine, but the mhash would sometimes go to 200 and then back up to 395. try a fan in front just to see what happens.
sr. member
Activity: 454
Merit: 250
Technology and Women. Amazing.
September 27, 2012, 11:06:45 PM
#24
850w should be fine for powering a 7770, 6990, quad-core CPU, mechanical hard drive, and you should still have some wattage to spare.
One of my rigs is an i7-920 130W cpu, 6950 2gb with unlocked shaders, and a 5830. Running perfectly fine on a Corsair 750w 80+ bronze PSU for over a year now.
sr. member
Activity: 294
Merit: 250
September 27, 2012, 10:10:09 PM
#23
Hey!

ULPS disable, crossfire is disabled (no option to enable; greyed out)
BIOS settings have been checked

I thought maybe it was PSU but why would a lack of power prevent you from underclocking the memory?

Playing with the power  (0-20) did allow me to underclock the memory but my core dropped to 200 mhz as well.



Well, I suggested the PSU as a problem more to address your throttling issue rather than the memory underclock issue.

I don't think this is your problem, but is your 7770 blowing it's exhaust directly onto the 6990...? If so, try switching their slots or moving them 1 -2 more slots apart...

And if THAT doesn't work then I think and I feel pretty confident that your problem is the PSU not having enough wattage to cover both your 7770 and 6990 at the same time. Try removing the 7770 and see if your problem improves. If it does, go for a bigger power supply.

Your 7770 requires at minimum a 500w power supply and the 6990 requires a 650w power supply, the two together just may be overwhelming your 850w power supply.
newbie
Activity: 9
Merit: 0
September 27, 2012, 09:57:24 PM
#22
Hey!

ULPS disable, crossfire is disabled (no option to enable; greyed out)
BIOS settings have been checked

I thought maybe it was PSU but why would a lack of power prevent you from underclocking the memory?

Playing with the power  (0-20) did allow me to underclock the memory but my core dropped to 200 mhz as well.

sr. member
Activity: 294
Merit: 250
September 27, 2012, 09:54:55 PM
#21
Another thought:

Also try disabling crossfire if it is enabled...
sr. member
Activity: 294
Merit: 250
September 27, 2012, 09:43:25 PM
#20
Another thought, if you are using software to overclock, make sure you turn off all your turbo and throttling settings in the BIOS as you may be over or underclocking your FSB through the BIOS which will affect the gpu.
sr. member
Activity: 294
Merit: 250
September 27, 2012, 09:33:06 PM
#19
Hey so my PSU is 850 watt OCZ Z series 80%+Gold Cert

I am using the lastest drivers, MSI, etc. Played around with the power slides still nothing =/. Weird =/. Oh well, running it at stock (830 mhz/1250) ... each cores pulling about 370 Mhash/s...temperatures after 4 hours at 96-100% load are ~70 Celsius at cores and vram is at 106.

I'm going to try other things when I have more time, if anybody else has any other solutions I am all ears. If I do get it to work I will update

Thanks to everyone for their help and support! You guys rock =)

Hmm, well the minimum required for your card is 650w, recommended is 1200w for optimal performance...

Do you have additional video cards or any other after-market hardware that might be using a lot of power...?

Also, make sure you have ULPS disabled...
newbie
Activity: 9
Merit: 0
September 27, 2012, 09:25:22 PM
#18
Hey so my PSU is 850 watt OCZ Z series 80%+Gold Cert

I am using the lastest drivers, MSI, etc. Played around with the power slides still nothing =/. Weird =/. Oh well, running it at stock (830 mhz/1250) ... each cores pulling about 370 Mhash/s...temperatures after 4 hours at 96-100% load are ~70 Celsius at cores and vram is at 106.

I'm going to try other things when I have more time, if anybody else has any other solutions I am all ears. If I do get it to work I will update

Thanks to everyone for their help and support! You guys rock =)
sr. member
Activity: 336
Merit: 250
September 27, 2012, 07:46:29 PM
#17
are you using msi afterburner?
what driver set you have?

and as to  the heat, I called msi, this cards have been rated up to 99c.. ive tried undervolting but it acts up. my hotest gpu is about 96-98c im over clocked to 915 ram at 625 and with a fan mine mine 24/7 no problems.

...Call us in a month and let us know if they're broken  Cheesy
sr. member
Activity: 294
Merit: 250
September 27, 2012, 07:35:02 PM
#16
And last try messing with power control settings in CCC. Try between the range of 0 to +20%...

I am about 90% sure this will solve your problem.
sr. member
Activity: 294
Merit: 250
September 27, 2012, 07:33:19 PM
#15
Also, what is the wattage on your PSU...? It may be possible that the card is drawing more power than your PSU has to give...
full member
Activity: 246
Merit: 100
September 27, 2012, 07:26:58 PM
#14
are you using msi afterburner?
what driver set you have?

and as to  the heat, I called msi, this cards have been rated up to 99c.. ive tried undervolting but it acts up. my hotest gpu is about 96-98c im over clocked to 915 ram at 625 and with a fan mine mine 24/7 no problems.
sr. member
Activity: 294
Merit: 250
September 27, 2012, 07:16:00 PM
#13
Check this out: http://hardforum.com/showthread.php?t=1647728

Your answer just might be in there...
newbie
Activity: 9
Merit: 0
September 27, 2012, 07:13:21 PM
#12
Yea I found it pretty weird too, and its an XFX 6990. And thanks for all the support and suggestion guys! Much appreciated
full member
Activity: 246
Merit: 100
September 27, 2012, 07:06:17 PM
#11
what brand vid card you running?
sr. member
Activity: 294
Merit: 250
September 27, 2012, 06:52:48 PM
#10
Hmmm, strange... I wish I had more knowledge about that specific graphics card...
newbie
Activity: 9
Merit: 0
September 27, 2012, 05:57:08 PM
#9
Yup it is set to "Show Current Reading"  I can't even set the memory clocks 1 mhz lower then stock. Tried to set it same as gpu too. Nothing doing. Can only overclock it not underclock

http://s9.postimage.org/58h26u0gr/Core_1_gc.gif

http://s9.postimage.org/tq95uq317/core_1.gif

http://s9.postimage.org/7flaur5qz/core_2_gc.gif

http://s9.postimage.org/u5p11hecb/core_2.gif
sr. member
Activity: 294
Merit: 250
September 27, 2012, 04:54:36 PM
#8
Thanks for the suggestion still no luck thugh. Wont even downclock 1 mhz. Tried to put it at the same speed as gpu, then lower, then higher, and only higher worked. Even going down 1mhz would make it run at stock. Will update with pics to show what I mean. Perhaps there is some patch download or something?

Also, click on the drop-downs next to each reading and make sure "Show Current Reading" (or something similar, dunno, not looking at the program right now) as opposed to "Show Highest, Show Lowest or Show Average".
newbie
Activity: 9
Merit: 0
September 27, 2012, 04:46:40 PM
#7
Thanks for the suggestion still no luck thugh. Wont even downclock 1 mhz. Tried to put it at the same speed as gpu, then lower, then higher, and only higher worked. Even going down 1mhz would make it run at stock. Will update with pics to show what I mean. Perhaps there is some patch download or something?
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