AMD 7970 LTC Mining, CGminer, Crash on LTC, not on BTC

darko84

member

Activity: 62

Merit: 10

Quote from: emunebtk on June 21, 2013, 12:10:22 AM

Been dealing with very similar thing and curious if anyone has any guidance to push me just a bit further :

After several BIOS flashes and fresh installs of many catalyst versions I am currently running stable at 700/khs on a 925/1275 speeds with TC of 8192 on 13.6 beta 2 catalyst and cgminer 3.2.2. I flashed from a OC to TO BIOS to get a default of 1100/1500 instead of the 1000/1375 it came with. It allowed me to shoot into the high 750plus kh/s speeds but would constantly crash and go to black screen 5 minutes later when using 1042/1500 and was about to hit 90temp before I shut it of.. Found the 925/1275 on a forum and that brings me to a stable 700 kh/s with a 82-85 temp still being in the case with no risers(side panel off).

Does anyone have any configs for cgminer to get above 705 kh/s using a GPU engine speed of less then a 1000? Making progress one kh/s at a time. If I could get 30-50 more Id be such a happy camper...thanks guys!

What exactly revision card you got? What is the bios you put into it?
I also have a Gigabyte 7970 OC rev 1.0

emunebtk

sr. member

Activity: 252

Merit: 250

Been dealing with very similar thing and curious if anyone has any guidance to push me just a bit further :

After several BIOS flashes and fresh installs of many catalyst versions I am currently running stable at 700/khs on a 925/1275 speeds with TC of 8192 on 13.6 beta 2 catalyst and cgminer 3.2.2. I flashed from a OC to TO BIOS to get a default of 1100/1500 instead of the 1000/1375 it came with. It allowed me to shoot into the high 750plus kh/s speeds but would constantly crash and go to black screen 5 minutes later when using 1042/1500 and was about to hit 90temp before I shut it of.. Found the 925/1275 on a forum and that brings me to a stable 700 kh/s with a 82-85 temp still being in the case with no risers(side panel off).

Does anyone have any configs for cgminer to get above 705 kh/s using a GPU engine speed of less then a 1000? Making progress one kh/s at a time. If I could get 30-50 more Id be such a happy camper...thanks guys!

Schrankwand

full member

Activity: 224

Merit: 100

Quote from: -ck on April 25, 2013, 05:51:55 AM

Quote from: Schrankwand on April 25, 2013, 05:46:09 AM

Quote from: -ck on April 24, 2013, 07:51:59 PM

Ironically the overclock 7970 GPUs don't mine LTC as well as the stock reference design. It's (now) a well known issue.

Well, that is what you get for being gaming oriented. I just got myself the one with lots of reviews, ridiculous core clock and thought "to hell with it."

So, in essence you are telling me i could have saved around 100 euros, got myself a stock card, used less electricity and got better results Cheesy

Irony. But since I AM a gamer, it is okay. Annoying, but okay.

Well not all is lost. The tuning on those is just very different and is better with lower TCs, intensity and more gpu threads, but the hashrates are not better.

Hi everyone,

I was pretty successful with the work I did and the card runs fine. I did some more modifications to my case, which keeps it cool enough.

So, apart from that, I notice stales coming up. Usually, these appear at the single moment when a new block is detected on the litecoin network. Is there any way around this? I had 3-4% before, but one day I had 1500 shares and ~120 stales, so that hurt a little bit.

Cgminer then says "Job not found"

crazyates

legendary

Activity: 952

Merit: 1000

Quote from: -ck on April 24, 2013, 08:54:54 PM

See here:
https://bitcointalksearch.org/topic/lets-solve-the-unreliable-7970-issues-share-your-observationsinput-174036

Ah gotcha. I hadn't read that link, as I never visit the alt-coin sections. That's crazy, tho.

Quote from: Schrankwand on April 25, 2013, 05:46:09 AM

Irony. But since I AM a gamer, it is okay. Annoying, but okay.

Pretty much the same here. I love gaming on this card, and the crazy OC and decent temps makes this awesome for BTC mining. I'm not a huge fan of LTC anyways, but I just wanted to see how far I could push it.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

Quote from: Schrankwand on April 25, 2013, 05:46:09 AM

Quote from: -ck on April 24, 2013, 07:51:59 PM

Ironically the overclock 7970 GPUs don't mine LTC as well as the stock reference design. It's (now) a well known issue.

Well, that is what you get for being gaming oriented. I just got myself the one with lots of reviews, ridiculous core clock and thought "to hell with it."

So, in essence you are telling me i could have saved around 100 euros, got myself a stock card, used less electricity and got better results Cheesy

Irony. But since I AM a gamer, it is okay. Annoying, but okay.

Well not all is lost. The tuning on those is just very different and is better with lower TCs, intensity and more gpu threads, but the hashrates are not better.

Schrankwand

full member

Activity: 224

Merit: 100

Quote from: -ck on April 24, 2013, 07:51:59 PM

Ironically the overclock 7970 GPUs don't mine LTC as well as the stock reference design. It's (now) a well known issue.

Well, that is what you get for being gaming oriented. I just got myself the one with lots of reviews, ridiculous core clock and thought "to hell with it."

So, in essence you are telling me i could have saved around 100 euros, got myself a stock card, used less electricity and got better results Cheesy

Irony. But since I AM a gamer, it is okay. Annoying, but okay.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

Quote from: crazyates on April 24, 2013, 08:24:48 PM

Quote from: -ck on April 24, 2013, 07:51:59 PM

Ironically the overclock 7970 GPUs don't mine LTC as well as the stock reference design. It's (now) a well known issue.

I wonder why that is? Seems odd.

See here:
https://bitcointalksearch.org/topic/lets-solve-the-unreliable-7970-issues-share-your-observationsinput-174036

I'm guessing the non-reference cards use a chipset design/layout/timing that simply does not work as well for this workload thanks to some exquisitely timing sensitive harmonics.

crazyates

legendary

Activity: 952

Merit: 1000

Quote from: -ck on April 24, 2013, 07:51:59 PM

Ironically the overclock 7970 GPUs don't mine LTC as well as the stock reference design. It's (now) a well known issue.

I wonder why that is? Seems odd.

-ck

legendary

Activity: 4088

Merit: 1631

Ruu \o/

Ironically the overclock 7970 GPUs don't mine LTC as well as the stock reference design. It's (now) a well known issue.

crazyates

legendary

Activity: 952

Merit: 1000

Quote from: Schrankwand on April 24, 2013, 05:26:25 PM

Quote from: crazyates on April 24, 2013, 05:24:37 PM

Quote from: Schrankwand on April 24, 2013, 05:07:36 PM

Quote from: logicus on April 24, 2013, 02:46:12 PM

For 7970(cgminer) try 900 MHz core and 1580 MHz memory: thread_concurrency 22392 (~700 kh/s can be obtained with a core/memory ratio of 0.57) or 8192 (-g 2 -w 256 -I 13)

I must have something completely different than you guys here. Dunno about this card, seems to be somehow deviant.

I can mine LTC with 1150/1500 at 620kh/s core, at your settings it gives me 490kh/s at 8192 and completely crashes on 22392.

LTC is a bitch. The same settings that work one place don't work in another.

What pisses me off with this card is that its memory settings only go to 1600mhz.

I mean, the core is a normal one, that is already overclcoked from 925 to 1100. I have put this in a burn in test yesterday and it survived 15 minutes of furmark on 1210. But put memory to 1650 -- boom.

Quote from: Schrankwand on April 24, 2013, 05:59:41 PM

System now running at 1175/1600, stable. Gets me 635. 1180 to 1185 crashes.

I can OC my mem to 1825MHz, and I can't get near 635KH/s. I've tried 1 thread and 2. I've tried different thread concurrencies, ranging from 8192, 10240, 20480, 22528, or 24000. I've increased the hashrate in 5Mhz increments from 900 all the way too 1180, and all it ever does is increase 2-3KH/s every bump - it never evens jumps any higher. My best hashrates only come at -I 13, anything higher or lower than that and it drops. It's so annoying.

Schrankwand

full member

Activity: 224

Merit: 100

Quote from: Jude Austin on April 24, 2013, 05:37:11 PM

When your memory is at 1600, put your engine at 1000.

Then move the engine speed up or down in 5Mhz increments and see if that helps.

Just takes a lot of tweaking.

Funny thing: I did that. Here is my results from the last 30 minutes:

System now running at 1175/1600, stable. Gets me 635. 1180 to 1185 crashes.

This is a seemingly ridiculous setting, right?

Quote

Also be sure to delete the .bin files in the cgminer directory before running a new configuration.

They should say Tahiti in them somewhere.

This, I actually didn't. I noticed them piling up, unsure if they do anything lying around there...

Jude Austin

legendary

Activity: 1140

Merit: 1000

The Real Jude Austin

When your memory is at 1600, put your engine at 1000.

Then move the engine speed up or down in 5Mhz increments and see if that helps.

Just takes a lot of tweaking.

Make sure you are using 2 threads and 13 intensity.

Also be sure to delete the .bin files in the cgminer directory before running a new configuration.

They should say Tahiti in them somewhere.

Just put memory as high as it can go and start at say 950 engine speed and work your way up.

You will see the hash rate increase and stabilize once you hit the sweet spot.

You'll get it.

Schrankwand

full member

Activity: 224

Merit: 100

Quote from: crazyates on April 24, 2013, 05:24:37 PM

Quote from: Schrankwand on April 24, 2013, 05:07:36 PM

Quote from: logicus on April 24, 2013, 02:46:12 PM

For 7970(cgminer) try 900 MHz core and 1580 MHz memory: thread_concurrency 22392 (~700 kh/s can be obtained with a core/memory ratio of 0.57) or 8192 (-g 2 -w 256 -I 13)

I must have something completely different than you guys here. Dunno about this card, seems to be somehow deviant.

I can mine LTC with 1150/1500 at 620kh/s core, at your settings it gives me 490kh/s at 8192 and completely crashes on 22392.

LTC is a bitch. The same settings that work one place don't work in another.

What pisses me off with this card is that its memory settings only go to 1600mhz.

I mean, the core is a normal one, that is already overclcoked from 925 to 1100. I have put this in a burn in test yesterday and it survived 15 minutes of furmark on 1210. But put memory to 1650 -- boom.

crazyates

legendary

Activity: 952

Merit: 1000

Quote from: Schrankwand on April 24, 2013, 05:07:36 PM

Quote from: logicus on April 24, 2013, 02:46:12 PM

For 7970(cgminer) try 900 MHz core and 1580 MHz memory: thread_concurrency 22392 (~700 kh/s can be obtained with a core/memory ratio of 0.57) or 8192 (-g 2 -w 256 -I 13)

I must have something completely different than you guys here. Dunno about this card, seems to be somehow deviant.

I can mine LTC with 1150/1500 at 620kh/s core, at your settings it gives me 490kh/s at 8192 and completely crashes on 22392.

LTC is a bitch. The same settings that work one place don't work in another.

Schrankwand

full member

Activity: 224

Merit: 100

Quote from: logicus on April 24, 2013, 02:46:12 PM

For 7970(cgminer) try 900 MHz core and 1580 MHz memory: thread_concurrency 22392 (~700 kh/s can be obtained with a core/memory ratio of 0.57) or 8192 (-g 2 -w 256 -I 13)

I must have something completely different than you guys here. Dunno about this card, seems to be somehow deviant.

I can mine LTC with 1150/1500 at 620kh/s core, at your settings it gives me 490kh/s at 8192 and completely crashes on 22392.

logicus

newbie

Activity: 57

Merit: 0

For 7970(cgminer) try 900 MHz core and 1580 MHz memory: thread_concurrency 22392 (~700 kh/s can be obtained with a core/memory ratio of 0.57) or 8192 (-g 2 -w 256 -I 13)

Schrankwand

full member

Activity: 224

Merit: 100

Quote from: previse on April 24, 2013, 02:35:08 PM

I have a gigabyte 7970 as well and i get 700-715 kh/s @ 70 Deg C

Probably better housing than mine. I am using it in a way that might not be recommended, leading to limited air circulation.

However the card crashes before it even gets hot if I overclock it... what did you do to get there?

previse

newbie

Activity: 14

Merit: 0

I have a gigabyte 7970 as well and i get 700-715 kh/s @ 70 Deg C

Schrankwand

full member

Activity: 224

Merit: 100

Update on this:

Card runs stable at 600kh/s. Can get it up to 640, but then it starts to become a 95° toaster.

Problems so far: Settings are all correct, memory overclock doesnt work right over 1600mhz. So now im at 1050/1600 at 1.256v. Thinking about getting another card.

Jude Austin

legendary

Activity: 1140

Merit: 1000

The Real Jude Austin

I can help you.

If you would like I can set it up for you.

PM me your TeamViewer information and we will get started.

Topic: AMD 7970 LTC Mining, CGminer, Crash on LTC, not on BTC (Read 11716 times)