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Bitcoin mining is now a specialized and very risky industry, just like gold mining. Amateur miners are unlikely to make much money, and may even lose money. Bitcoin is much more than just mining, though!
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Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction.
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relm9
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June 20, 2013, 10:35:35 PM |
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Most likely the second core isn't being undervolted. I read before this was a problem with earlier 7990s, and the linked card is one of them. Undervolting both cores works fine on my 7990 but I have the newer Malta revision.
Try disabling ULPS, if you haven't already.
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Charles999
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June 20, 2013, 10:53:07 PM |
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Most likely the second core isn't being undervolted. I read before this was a problem with earlier 7990s, and the linked card is one of them. Undervolting both cores works fine on my 7990 but I have the newer Malta revision.
Try disabling ULPS, if you haven't already.
How are you guys undervolting the Maltas? I have them running stock and they are running at 100C on each card! HELP. thanks |
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relm9
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June 20, 2013, 11:19:36 PM |
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Most likely the second core isn't being undervolted. I read before this was a problem with earlier 7990s, and the linked card is one of them. Undervolting both cores works fine on my 7990 but I have the newer Malta revision.
Try disabling ULPS, if you haven't already.
How are you guys undervolting the Maltas? I have them running stock and they are running at 100C on each card! HELP. thanks MSI Afterburner - using latest version 3.0 beta 10. Undervolted to 1.0v and 950MHz/900MHz clocks mine run around 78C. |
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bitpop
Legendary
 Offline
Activity: 2912
Merit: 1060
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June 21, 2013, 04:57:53 AM |
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What the hell is that red light?
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goxed
Legendary
Offline
Activity: 1946
Merit: 1006
Bitcoin / Crypto mining Hardware.
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June 21, 2013, 09:35:54 AM |
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What the hell is that red light?
BIOS change switch |
Revewing Bitcoin / Crypto mining Hardware.
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bitpop
Legendary
Offline
Activity: 2912
Merit: 1060
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June 21, 2013, 09:39:40 AM |
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What's it switch?
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relm9
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June 21, 2013, 06:58:32 PM |
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What's it switch?
You can flash a secondary BIOS, in case something goes wrong you can switch back to the default and re-flash. Failsafe against completely bricking the card basically. |
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Xian01
Legendary
Offline
Activity: 1652
Merit: 1067
Christian Antkow
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June 21, 2013, 08:26:08 PM |
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How are you guys undervolting the Maltas? I have them running stock and they are running at 100C on each card!
MSI Afterburner or Sapphire Trixx should do the job. Make sure you verify the settings take on the second GPU. |
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greaterninja
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June 21, 2013, 09:07:24 PM |
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You can down clock memory to 40-100mhz (You may run into stability problems around 50mhz range)
Use MSI Afterburner and down clock the memory, under-volt if you wish (have to enable it), and speed up the fan (manually).
1. install latest msi afterburner.
1B. Close MSI Afterburner and keep it closed until the last step.
2. Edit the MSIAfterburner.cfg file and put this MSIAfterburner.cfg file in the msi afterburner directory.
C:\Program Files (x86)\MSI Afterburner
3. search for atipdlxx.zip or atipdlxx.dll on google or bitcointalk.
3B. put atipdlxx.dll in C:\Program Files (x86)\MSI Afterburner
4. open msi afterburner.
I recommend dragging memory mhz down to 80-100mhz
or lowest level then close msi afterburner then reopen to down clock more.
turn fan off from auto, move fan % to appropriate level.
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relm9
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June 23, 2013, 06:55:08 PM |
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7990 tahiti (probably malta too? ) second gpu is voltage locked. But, if you set core clock at 700 with cgminer, then is posible lovering voltage to 0.950 (with cgminer). Second gpu always is more hot.
I have a Malta and the second GPU is not voltage locked. |
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greaterninja
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June 23, 2013, 09:31:42 PM |
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yeah my sapphire 7990 is not voltage locked.. my gigabyte 7990s were and they ran hot as hell.
my sapphire on the other hand has been running for a couple weeks non stop in my open case, 74-78c.
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carly200
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November 18, 2013, 11:10:30 PM |
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yeah my sapphire 7990 is not voltage locked.. my gigabyte 7990s were and they ran hot as hell.
my sapphire on the other hand has been running for a couple weeks non stop in my open case, 74-78c.
7990 tahiti (probably malta too? ) second gpu is voltage locked. But, if you set core clock at 700 with cgminer, then is posible lovering voltage to 0.950 (with cgminer). Second gpu always is more hot.
I have a Malta and the second GPU is not voltage locked. I am looking to get a 7990 for mining, but the information about undervotling (second core) is incconclusive. which cards are you using (mode number?) and do oyu have more information about undervolting? |
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BeneQ
Newbie
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Activity: 67
Merit: 0
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November 26, 2013, 08:47:10 PM |
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I have got two 7990 from Gigabyte ( Malta ) they are hot like hell  now I am trying to setup lower VDDC on them using cgminer : "gpu-vddc" : "1.120,1.120,1.120,1.120", but second most hot gpu stays with VDDV 1.175 :/ I was reading somewhere that malta gpu can work on stock 1000/1500MHz with VDDC 1.095 / 1.100 without lowering vddc we can forget about mining scrypt on it with room temperatures :/ +/- 21'C |
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carly200
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November 26, 2013, 11:15:51 PM |
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i have notices on other (single) gpus, that cgminer only reports what the driver reports as voltage. but that can be quite different from what voltage is really set in the card!!!
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BeneQ
Newbie
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Activity: 67
Merit: 0
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November 29, 2013, 10:09:33 AM
Last edit: November 29, 2013, 04:26:10 PM by BeneQ |
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My voltage problem solved , catalyst 13.9 and MSI AfterBurner 3.0 beta 17
vddc for my 7990 set up at 1.13V without OC and every gpu is mining with speed 660KH/s max GPU temperatures 78'C
VRM temperatures 85'C good enough for me now .
b.t.w
I still can't play BF4 or Benchmarks using 2x7990 it is shame on AMD drivers team that they can't do a proper drivers for multigpu configs.
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Eastwind
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December 09, 2013, 07:01:04 PM |
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My voltage problem solved , catalyst 13.9 and MSI AfterBurner 3.0 beta 17
vddc for my 7990 set up at 1.13V without OC and every gpu is mining with speed 660KH/s max GPU temperatures 78'C
VRM temperatures 85'C good enough for me now .
b.t.w
I still can't play BF4 or Benchmarks using 2x7990 it is shame on AMD drivers team that they can't do a proper drivers for multigpu configs.
Are you able to lower memory voltage? |
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