[SOLVED] 7970 hashrate slows in multi-gpu config (20 FTC BOUNTY)

[child_harold]

Sapphire 11197-12-40G 7970 3GB Vapor-X flashed with Sapphire Dual-X 7970 BIOS
was getting 720kH when sitting alone on mobo.

When adding other gpu's (a 5770 and r9 290) the Vapor-X slows to 540kH/s

I'm well-powered (550w and 750w PSUs) and sitting on a DH67BL mobo (using two 1x to 16x powered risers).

I offer a modest 20 FTC Bounty for anyone who can help get my 7970 back to 720kH/s

I have tried:

1. Moving cards around.
2. Changing power cable configs
3. Updating bios
4. Using different drivers
4. Using -d switch in cgminer 3.7.2
5. Fiddling in CCC

My cgminer script is as follows:


{
"pools" : [

   {
      "url" : "blah",
      "user" : "blah.blah",
      "pass" : "blah"
   }
],

"intensity" : "13, 18, 17",
"scrypt" : true,
"auto-gpu" : true,
"auto-fan" : true,
"gpu-engine" : "1050, 947, 850 ",
"gpu-memclock" : "1500, 1250, 1200",
"vectors" : "1, 1, 1",
"gpu-threads" : "2, 2, 2",
"worksize" : "256, 256, 256",
"lookup-gap" : "2, 2, 2",
"thread-concurrency" : "8192, 24000, 7680",
"gpu-powertune" : "20, 20, 20",
"gpu-fan" : "40-90, 60-95, 60-90",
"temp-cutoff" : "85, 88, 86",
"temp-overheat" : "81, 85, 84",
"temp-target" : "71, 81, 73"


}

The 7970 is GPU 0 and is using  the same settings as it did for 720kH

BTW
1. wherever I move the cards the 7970 is always shown as GPU 0 in cgminer - is this normal?
2. The conf file only partially loads. I don't read much into this. Perhaps i should.

Thanks in advance.

[bjalbert]

I assume the other cards are hashing fine? Did you change your bin file and if so look in your trash for your old one. I am not an expert on mixing cards but try different instances of cgminer for each card so bin file is unique. cgminer comes up with all sorts of settings so maybe keep all your cards in different directories to make sure bin is different for each. In cgminer hit "S" then "W"(create config file) and you will see the other settings beyond what you have listed above.

[child_harold]

Other cards hashing fine.

I have tried using -d switch in cgminer to run only the 7970, to no avail.

Could you please elaborate slightly on the process of putting the gpu's into different directories?

thanks

[QNX]

in cgminer separate thread option 2,2,2 do not work, so use sgminer https://pay.reddit.com/r/litecoinmining/comments/1xanpt/ann_sgminer_410_release/

and with different card you'll get proper speeds

http://imageshack.com/a/img543/2036/y8l6.jpg

Code:

],
"api-allow" : "W:127.0.0.1",
"api-listen" : true,
"api-mcast-port" : "4028",
"api-port" : "4028",
"kernel-path" : "/usr/local/bin",
"log" : "2",
"kernel" : "zuikkis",
"scan-time" : "30",
"device" : "0,1,2,3",
"gpu-threads" : "2,2,1,1",
"gpu-engine" : "1090,1070,1100",
"gpu-fan" : "100",
"gpu-memclock" : "1500,1500,1500",
"gpu-powertune" : "10",
"intensity" : "13,13,19,13",
"temp-cutoff" : "99",
"worksize" : "128",
"shaders" : "2048,2048,1280,384",
"lookup-gap" : "2",
"vectors" : "1",
"thread-concurrency" : "8192,8192,24000,8192",
}

use your clocks and threads setting according to the cards

[child_harold]

bjalbert and QNX

Gentlemen... you rock!!! (as do I)

Having taken advice from both of you to ultimately solve my problem I will split the bounty between you.
10 FTC each

Consider this matter SOLVED.

I hope that this thread may be of use to others in my situation.
All 3 of my cards are now maxed out and I have migrated to sgminer. The Sapphire 7970 Vapor-X with the Dual-X bios is now hitting 730kH/s!
 
the --gpu-threads option was key in this, as was the deletion of old bins and ultimately a move to sgminer.

I am delighted this fork of cgminer exists (thanks again QNX and sgminer devs)
https://pay.reddit.com/r/litecoinmining/comments/1xanpt/ann_sgminer_410_release/

Perhaps I'll write up the saga of my mining rig. Only used windows in the past for x264 encoding so the mining rig setup was something of a fiery baptism. Quite literally - one of the power cables was hanging too close to the hot air blowing out of one gpu and the cable overheated and melted. The PSU survived as did my apartment. Has I no been there to deal with it bad things could have happened. I half expect to hear a news story about some guy burning his house down while mining crypto…

Please contact me with an FTC address to collect your BOUNTY. If you'd prefer the equivalent in LTC this can be done. I feel you deserve more, especially QNX, and I'll float a couple more feathercoins your way for your highly appreciated efforts.

Har-Di-Har-Harrrrr…

Thank YOU

p.s. go the Jamaican bobsleigh team

[bjalbert]

That's ok no payment necessary. Glad it is fixed.

[child_harold]

That's ok no payment necessary. Glad it is fixed.

Most kind of you bjalbert…

…in which case I'll award the full amount to QNX

Thanks again to you both.