(LTC Reward) Gigabyte 7950 - Settings Nightmare

[logicus]

I bild new PC with 1xGigabyte 7950 GV-R795WF3-3GD
The new card is 1x6 + 1x8 pin power
1.25V 1000/1250
I install win 7 x64,MB drivers and latest drivers from amd.com
Download and install Trixx.
Flash VGA bios from FX1 to F43 with winflash http://www.overclock.net/t/1353325/tutorial-atiwinflash-how-to-flash-the-bios-of-your-ati-cards

I make 2 bat files
start1.bat:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

and
start2.bat:
timeout 25
color 07
cgminer --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u user.1 -p 1 --shaders 1792 --thread-concurrency 10240 -I 13 -g 2 -w 256

I put two files in cgminer's folder,make 2 shortcuts and put then in windows Startup

I open Trixx and set 1140 core and 1420 memory.Save in profil 1.
Set custom fan profill  70% 70 C,100% 80C.
Set Trix start with Windows.
I restart pc and after 40s vga start mining LTC with 608Kh/s.

P.S.
with "--thread-concurrency" over 11000 cgminer wont start.
Power "on the wall"  is 295W at 1.09 70%fan  70C  and  330W at 1.25 80%fan  73C

PC
MB G33/RAM 2GB/CPU C2D 5300/HDD 500GB 2,5"/7950 GV-R795WF3-3GD/Corsair TX650W

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[poohbah]

My MSI and Sapphire 7950's run well at the following clock/voltage combos, depending on the heat in the house.

950v/950mhz
975v/1025mhz
1000v/1050mhz

cgminer gets me about 500khash each (config #1 below) in a closed case system at the lower settings with ~70C/75C, and 1100khash at the higher settings (also config #1 below), depending on the room temp. A single card can reach much higher khash with lower temps, but you should try these voltage/core clocks. Memory is 1500mhz @ 1.6v.

This cgminer config leaves the system more usable:
"intensity" : "13,13",
"kernel" : "scrypt",
"gpu-threads" : "2",
"thread-concurrency" : "8192,8192",
"lookup-gap" : "2,2",
"scrypt" : true

This cgminer config gives about 50-60 higher khash per card, at the cost of system usability:
"intensity" : "18,18",
"kernel" : "scrypt",
"gpu-threads" : "1",
"thread-concurrency" : "20992,20992",
"lookup-gap" : "2,2",
"scrypt" : true

[p4xil]

I bild new PC with 1xGigabyte 7950 GV-R795WF3-3GD
The new card is 1x6 + 1x8 pin power
1.25V 1000/1250
I install win 7 x64,MB drivers and latest drivers from amd.com
Download and install Trixx.
Flash VGA bios from FX1 to F43 with winflash http://www.overclock.net/t/1353325/tutorial-atiwinflash-how-to-flash-the-bios-of-your-ati-cards

I make 2 bat files
start1.bat:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

and
start2.bat:
timeout 25
color 07
cgminer --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u user.1 -p 1 --shaders 1792 --thread-concurrency 10240 -I 13 -g 2 -w 256

I put two files in cgminer's folder,make 2 shortcuts and put then in windows Startup

I open Trixx and set 1140 core and 1420 memory.Save in profil 1.
Set custom fan profill  70% 70 C,100% 80C.
Set Trix start with Windows.
I restart pc and after 40s vga start mining LTC with 608Kh/s.

P.S.
with "--thread-concurrency" over 11000 cgminer wont start.
Power "on the wall"  is 295W at 1.09 70%fan  70C  and  330W at 1.25 80%fan  73C

PC
MB G33/RAM 2GB/CPU C2D 5300/HDD 500GB 2,5"/7950 GV-R795WF3-3GD/Corsair TX650W

you can not go over 11000 TC because you use -g 2
just make one BAT file with this config:

Code:

color 07
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u user.1 -p 1 --thread-concurrency 24000 --lookup-gap 2 --gpu-engine 1155 --gpu-memclock 1250 --gpu-powertune 20 -w 256 -I 19 -g 1

This gives me 670 kh/s on all WF3 cards ... I have 9 now ... flashed with F43 BIOS.
https://forum.litecoin.net/index.php/topic,2641.0.html

P.S.: you can also try TC 16384 and 21712. It works even better for some. I got 20 kh/s more per GPU with 16384 but I also got around 5 HW errors/day, so it seems 24000 is optimal for my setup.

[logicus]

I try

Code:

color 07
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u user.1 -p 1 --thread-concurrency 24000 --lookup-gap 2 --gpu-engine 1155 --gpu-memclock 1250 --gpu-powertune 20 -w 256 -I 19 -g 1

but i only get

Code:

Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)

I add 1GB RAM,try TC 16384 and 21712, but problem is still

Now i mining with old settings   --thread-concurrency 10240 -I 13 -g 2 -w 256  1140/1420  608kh/s

[p4xil]

delete any *.bin files in cgminer folder and try again.

[0150r]

I haven't seen much discussion on cooling here...If you have the card running inside a case with poor cooling, it will surely get hot. When I had a 7950 inside my gaming pc before the rest of my parts arrived, it would overheat and turn off. Cooling is much more of an issue with LTC mining vs BTC mining.

This is how my miner is set up right now. 3 Gigabyte 7950's spaced apart in a milk crate with a box fan blowing air in from outside. I live in San Diego so the outside air is pretty warm (I live inland, not by the coast).
http://farm8.staticflickr.com/7454/8730220674_0a0f6781fd.jpg

The cards run between 65 and 70 with my current config getting 1.773mhash/sec. I can crank it up an extra 150-200khash/sec by increasing the gpu-mem speed, but I like my fans running slower/quieter.  I used to run with constant fan/gpu values and it would yield better temps at night (58-62*) when the outside air was cooler, but with the auto-fan and auto-gpu, it will keep it 70* or less and turn the fans down.

Here is my config:

Code:

{
"pools" : [
	{
		"url" : "POOL HERE",
		"user" : USER NAME HERE",
		"pass" : "PASSWORD HERE"
	}
]
,
"intensity" : "20,20,20",
"vectors" : "1,1,1",
"worksize" : "256,256,256",
"kernel" : "scrypt,scrypt,scrypt",
"lookup-gap" : "2,2,2",
"thread-concurrency" : "24768,24768,24768",
"shaders" : "1792,1792,1792",
"gpu-engine" : "0-1000,0-1000,0-1000",
"gpu-fan" : "0-85,0-85,0-85",
"gpu-memclock" : "1000,1000,1000",
"gpu-memdiff" : "0,0,0",
"gpu-powertune" : "0,0,0",
"gpu-vddc" : "0.000,0.000,0.000",
"temp-cutoff" : "85,85,85",
"temp-overheat" : "80,80,80",
"temp-target" : "70,70,70",
"api-port" : "4028",
"auto-fan" : true,
"auto-gpu" : true,
"expiry" : "15",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "15",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}

[FullLife]

Regarding the MAX_ALLOC_PERCENT environment variable:

This setting is CASE SENSITIVE! I got stuck on this for a while. Go to your Environment Variables Settings panel:
Click the Start Button
In the search box type "var" without quotes.
Choose the "Edit the system environmental variables" option.
Click on [Environment Variables...]


Verify that MAX_ALLOC_PERCENT is present in ALL CAPS with a value of 100.

This will allow you to increase the thread-concurrency.

Wow, I can't believe it was something as simple as that!  I have literally tried everything I can think of to figure out why the hell I couldn't get any thread concurrency above 8192 to work in cgminer.  You are the man!  What's your LTC address?  I'm gonna send you some.

[elgeo]

Alright I am trying so many different combinations of settings for the 7950 in CGMiner from this site here
https://github.com/litecoin-project/litecoin/wiki/Mining-hardware-comparison#wiki-ATI_AMD_GPUs

I already did the MAX_ALLOC_PERCENT 100 thing in just a normal CMD (btw I am on Windows)
but first off, I cant have a thread concurrency of over 11,000, I get the disabling gpu/thread kernel error, even though it says 22400 when I do the auto tune type test for it. So Idk the problem there.

Tells me Memory click of 1600 is outta the safe zone, I got it to over 600 at one point but the thing got to 95 damn degrees, even on Intensity 16, I got it up to like 78-80 degrees. Can you guys help me figure out why it's getting so damn hot, btw when it does or I change some of these settings, the card just locks up and I have to reboot. So really would like answers/settings, it's the Gigabyte 3 fan 7950, using latest CGminer, my .bat I just keep switching around. Getting annoyed

25 LTC reward to whoever gives me the best solutions (if its a tie I'll split it up accordingly)

EDIT: Also, when I change the memory inside of CGMiner when it's running, the display I have hooked up to it goes black and my mouse freezes on the display thats hooked up to my Nvidia card
EDIT: Like right now, I have it working. If I just leave the stock clock and mem at 1000/1250 and 10600 threads at an intensity of 18, I get almost 600K/hash but the temp is 84C, like this is ridiculous.

use setx GPU_MAX_ALLOC_PERCENT 100 on window
mine cgminer settings for ubuntu is
--gpu-engine 930 --gpu-memclock 1250 --auto-fan --temp-target 78   --lookup-gap 2  -I 18 -g 1 -w 256 --thread-concurrency 24000

and i have 600 kh/s with no HW errors

good luck...


btw mine is saphire with cpu at 810 mhz

[Datto]

Thanks for your settings