Topic: HD7950 Crossifre very low Intensity / Massive HW errors above -I 13 (Read 2744 times)
January 03, 2014, 12:26:40 PM
you need a new rig thought
January 03, 2014, 04:05:05 AM
TBH, I found it was way easier to let CG Miner decide its own Thread Concurrency on multiple card setups. I leave it out of the .conf file and get 650Kh/s every time, with minimal tweaking on my Gigabyte 7950's.
January 03, 2014, 12:25:15 AM
mgoldfinger, would you be able to disclose what BIOS you've flashed too and/or where you obtained it?
I found this thread after Googling a bit and I'm having the exact same problem: fresh build, fresh Win7 64 install, (single) XFX HD 7950 DD has ever increasing HW failures at difficulty 13+ (it also rises in temperature pretty quickly after as well). Everything is stock. I've yet to toy with TC values.
GPU-Z lists the current BIOS as 015.024.000.001.000000
Glad you got yours working!
I found this thread after Googling a bit and I'm having the exact same problem: fresh build, fresh Win7 64 install, (single) XFX HD 7950 DD has ever increasing HW failures at difficulty 13+ (it also rises in temperature pretty quickly after as well). Everything is stock. I've yet to toy with TC values.
GPU-Z lists the current BIOS as 015.024.000.001.000000
Glad you got yours working!
December 23, 2013, 03:10:02 PM
FYI: solved.
Flashed the bios on the card using VBE7, which got me down to 1.080V and removed boost
Reinstalled windows and can now reach TC>40000 (which is pointless btw)
Tweaked the clocks and can now hash at +/-660 per card with GPU/RAM 1120/1500, stable and all.
btw.
http://www.holynerdvana.com/2013/12/finding-optimal-clock-speed-for-cgminer.html
great tool (credits to the developer)!
Flashed the bios on the card using VBE7, which got me down to 1.080V and removed boost
Reinstalled windows and can now reach TC>40000 (which is pointless btw)
Tweaked the clocks and can now hash at +/-660 per card with GPU/RAM 1120/1500, stable and all.
btw.
http://www.holynerdvana.com/2013/12/finding-optimal-clock-speed-for-cgminer.html
great tool (credits to the developer)!
December 05, 2013, 12:19:49 PM
I think i am zooming in on the problem, but i have no idea how to solve it / what is actually causing it?
I noticed stability is very much dependent on thread concurrency , in my setup
I can not get thread concurrency above 8192 (this should be way to low for a 7950??), without changing the lookup gap. @gap 2 i can run stable on intensity 13 @ 8192 concurrency. lowering concurrency results in HW errors @ I 13, gap 2
If i change lookup gap to 3, i can blast intensity to 19/20. However, performance is then gone.... +/-650 khz combined (remember i run a crosffire setup).
really getting stuck here......
I noticed stability is very much dependent on thread concurrency , in my setup
I can not get thread concurrency above 8192 (this should be way to low for a 7950??), without changing the lookup gap. @gap 2 i can run stable on intensity 13 @ 8192 concurrency. lowering concurrency results in HW errors @ I 13, gap 2
If i change lookup gap to 3, i can blast intensity to 19/20. However, performance is then gone.... +/-650 khz combined (remember i run a crosffire setup).
really getting stuck here......
December 05, 2013, 10:38:50 AM
I have a very similar setup (with a 3rd 7950) and have them tweaked to produce around 650KH/s with this config:
These hash rates were fairly consistent between Windows, Debian, and BAMT installations.
Code:
"auto-fan" : true,
"auto-gpu" : true,
"temp-cutoff" : "90",
"temp-overheat" : "80",
"temp-target" : "70",
"gpu-fan" : "0-100",
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "22400",
"shaders" : "0",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "1020,1020,1100",
"gpu-memclock" : "1500",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
These hash rates were fairly consistent between Windows, Debian, and BAMT installations.
not working i am afraid. still can't get intensity above 13.....
December 05, 2013, 06:27:49 AM
I have a very similar setup (with a 3rd 7950) and have them tweaked to produce around 650KH/s with this config:
These hash rates were fairly consistent between Windows, Debian, and BAMT installations.
Code:
"auto-fan" : true,
"auto-gpu" : true,
"temp-cutoff" : "90",
"temp-overheat" : "80",
"temp-target" : "70",
"gpu-fan" : "0-100",
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "22400",
"shaders" : "0",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "1020,1020,1100",
"gpu-memclock" : "1500",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
These hash rates were fairly consistent between Windows, Debian, and BAMT installations.
thanks, will try. Did you initially have similair problems like I am having?
December 05, 2013, 06:10:20 AM
I have a very similar setup (with a 3rd 7950) and have them tweaked to produce around 650KH/s with this config:
These hash rates were fairly consistent between Windows, Debian, and BAMT installations.
Code:
"auto-fan" : true,
"auto-gpu" : true,
"temp-cutoff" : "90",
"temp-overheat" : "80",
"temp-target" : "70",
"gpu-fan" : "0-100",
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "22400",
"shaders" : "0",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "1020,1020,1100",
"gpu-memclock" : "1500",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
These hash rates were fairly consistent between Windows, Debian, and BAMT installations.
December 05, 2013, 05:33:15 AM
Need some help here. I was previously running a rig with HD 6950 at a nicely tweaked level of about 500K/hs. I now build a new rig with the following specs:
- 2 x XFX HD7950 Double Dissipation (FX-795A-TDFC)
- MSI Z87-G45 Gaming,s1150
- Intel Core i3-4130,s1150
- 1 x TNAV6R00 Corsair RM1000 (Gold standard)
- ICIDU Value DDR3 1333-2GB (2x4GB)
- Windows 7 Home Premium 64Bit
All new hardware.
Using CGMiner 3.7.2. for scrypt mining
Did a clean install of Windows 7. After I installed all the latest AMD drivers, I input setx GPU_MAX_ALLOC_PERCENT 100 and I start cgminer
I get massive HV issues when trying to increase the intensity above 12!
currently running at stock with 900/1250 settings for GPU/RAM. Voltage is untouched. Both GPUs are found by CGminer and both have this issue.
I have tried:
1 CGMiner settings, adjusting –G, -W, --Thead Concurrency (8192 is the max I can run without adjusting the lookup-gap) --Lookup-gap, blank settings (I then get intensity 8
)
2 Various AMD/catalyst drivers
3 Varios CGMiner versions < 3.7.2
4 Run a single card, instead of crossfire.
5 Disabling crossfire, run both cards
6 Disabled performance tuning in the Catalyst software
7 Swapped the system RAM
8 mine a different pools / different Scrypt cons
I have found posts with similar problems, but none of the solutions seem to work for me. I also have the feeling that CGminer settings is not the issue here. More like a conflict somewhere happening in the rig?
Any ideas? did you also have this issue, and how did you solve it?
- 2 x XFX HD7950 Double Dissipation (FX-795A-TDFC)
- MSI Z87-G45 Gaming,s1150
- Intel Core i3-4130,s1150
- 1 x TNAV6R00 Corsair RM1000 (Gold standard)
- ICIDU Value DDR3 1333-2GB (2x4GB)
- Windows 7 Home Premium 64Bit
All new hardware.
Using CGMiner 3.7.2. for scrypt mining
Did a clean install of Windows 7. After I installed all the latest AMD drivers, I input setx GPU_MAX_ALLOC_PERCENT 100 and I start cgminer
I get massive HV issues when trying to increase the intensity above 12!
currently running at stock with 900/1250 settings for GPU/RAM. Voltage is untouched. Both GPUs are found by CGminer and both have this issue.
I have tried:
1 CGMiner settings, adjusting –G, -W, --Thead Concurrency (8192 is the max I can run without adjusting the lookup-gap) --Lookup-gap, blank settings (I then get intensity 8
)2 Various AMD/catalyst drivers
3 Varios CGMiner versions < 3.7.2
4 Run a single card, instead of crossfire.
5 Disabling crossfire, run both cards
6 Disabled performance tuning in the Catalyst software
7 Swapped the system RAM
8 mine a different pools / different Scrypt cons
I have found posts with similar problems, but none of the solutions seem to work for me. I also have the feeling that CGminer settings is not the issue here. More like a conflict somewhere happening in the rig?
Any ideas? did you also have this issue, and how did you solve it?
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