7970 will only mine at 550khash at stock clocks - Lower when OC'ed - HELP - page 2.

iruleeveryone28

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Quote from: matauc12 on April 11, 2013, 05:22:35 PM

Quote from: flound1129 on April 11, 2013, 05:18:06 PM

You can't just take someone else's clock numbers and use them. You need to tune your own clocks for your own card/mobo combination.

Actually, for clocks, you can. It has been demonstrated many times over that specific ratios at specific clocks, people reach similar sweet spots.

Where things vary a lot is with drivers/miner/thread conc/intensity/GPU thread. With those, you are on your own but still you should start with trying the common ones.

so frustrating, basically i can only clean install drivers with a clean install windows which requires waiting for automatic updates like .net. are there RECOMENDED drivers for 7970's generally? im on 13.1, tried 12.6 but cgminer just wouldnt work on it, maybe due to app sdk

matauc12

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Quote from: flound1129 on April 11, 2013, 05:18:06 PM

You can't just take someone else's clock numbers and use them. You need to tune your own clocks for your own card/mobo combination.

Actually, for clocks, you can. It has been demonstrated many times over that specific ratios at specific clocks, people reach similar sweet spots.

Where things vary a lot is with drivers/miner/thread conc/intensity/GPU thread. With those, you are on your own but still you should start with trying the common ones.

flound1129

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Activity: 938

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www.multipool.us

You can't just take someone else's clock numbers and use them. You need to tune your own clocks for your own card/mobo combination.

MaGNeT

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Waves | 3PHMaGNeTJfqFfD4xuctgKdoxLX188QM8na

Quote from: ditchmagnet on April 03, 2013, 07:57:28 AM

Why ditch me?

iruleeveryone28

newbie

Activity: 14

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might i just add, im running the 7970 on an old dual xeon processor mobo from about 6 years ago which has pci-e 1.0 x16.

is there a POSSIBILITY that pci-e 1.0's power supply is the reason for not being able to overclock? i'm sure this isnt the case as the voltages remain the same but could i be on to SOMETHING?

edit

im fairly newbie to all this. would undervolting the card help in overclocking the memory? is it possible to undervolt the gigabyte i seem to remember reading it isnt.

thanks

iruleeveryone28

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Power limit is "power control settings" in CCC i assume? are we tallking + or - 20? changing these does nothing for my gigabyte 7970, currently peaking at a measly 536khash. also ANY memory overclocking at the piece of shit dies. any thoughts? could it be overheating? can i change the point at which it kills itself in terms of heat? im starting to think this card is shit - here are my essentials -

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

cgminer --scrypt -o http://xxxxxxxxx -u xxxxxxx -p xxxxxxx --shaders 2048 --intensity 13 --worksize 256 --thread-concurrency 8192 -g 1

g2 makes no difference. higher thread concurrency kills khash to ~200.

Also, would one need to RESTART cgminer for changes to take effect? it seems even when i do OC the mem, nothing happens there and then, other than, of course, my computer dying.

matauc12

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Quote from: endriuska on April 11, 2013, 07:52:12 AM

Quote from: matauc12 on April 10, 2013, 09:27:20 PM

On any 7970 1035/1500 is achievable and at exactly those clocks I have 4 different models, 12 cards total doing 720khs.

Try 24000 conc, gputhread 1 intensity 18 (more if it can take it)
Or 12000 conc, 2 GPU thread, intensity 13

Matauc - thanks, but i guess i dont understand what are you referring to '1035/1500'? which ones are these are below?

1035 is the core (GPU clock) and 1500 is the mem clock. On your SS it shows mem clock as effective mem clock, so its 4x. 1500 would be 6000.

endriuska

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Quote from: matauc12 on April 10, 2013, 09:27:20 PM

On any 7970 1035/1500 is achievable and at exactly those clocks I have 4 different models, 12 cards total doing 720khs.

Try 24000 conc, gputhread 1 intensity 18 (more if it can take it)
Or 12000 conc, 2 GPU thread, intensity 13

Matauc - thanks, but i guess i dont understand what are you referring to '1035/1500'? which ones are these are below?

matauc12

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On any 7970 1035/1500 is achievable and at exactly those clocks I have 4 different models, 12 cards total doing 720khs.

Try 24000 conc, gputhread 1 intensity 18 (more if it can take it)
Or 12000 conc, 2 GPU thread, intensity 13

endriuska

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Activity: 91

Merit: 10

Quote from: Marrs on April 04, 2013, 11:24:22 PM

Quote from: scifimike12 on April 03, 2013, 09:31:22 PM

Try 875/1375. I found that yields ~608 Kh/s. Make sure power limit is @ 20%.

If you're using CGMiner, my settings are:

Code:

-I 13 -w 256 --thread concurrency 8192 -g 2

My 7970 was having the same issue the OP had with being stuck in the 550s, even though I was at 1050 core/1680 memory.

Then I tried your suggested settings, and my hash rate shot up into the low 600's. I then increased memory back to 1680 and that got me another 20kh/s or so.

I started working my core and memory frequencies up and down, until I found a setting that maximized my hash rate while keeping my system stable.

My final settings are: --gpu-powertune 20 --gpu-fan 0-100 --gpu-engine 1024 --gpu-memclock 1692 -I 13 -w 256 --thread-concurrency 8192 -g 2

Final hashrate is about 710 kh/s if I'm not using the machine, down to 500 kh/s if I'm web browsing.

Thanks for the suggestion, scifimike12!

Marss I'm working on the same issue, I'm glad you found the optimal setup. Can you please a screenshot of your clock speeds and all of that? I'm really new and just bought 2x7970 so I'm not really sure where to set those speeds and screenshot would be extremely helpful.

Thanks

iruleeveryone28

newbie

Activity: 14

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guys ive just reinstalled windows to install a clean driver.

going for 12.6 to check its performance against 13.1, but each time i open reaper OR cgminer is gets to connecting to pool then crashes. any ideas?

could it be i need to wait on windows update?

Marrs

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Activity: 112

Merit: 10

Quote from: scifimike12 on April 03, 2013, 09:31:22 PM

Try 875/1375. I found that yields ~608 Kh/s. Make sure power limit is @ 20%.

If you're using CGMiner, my settings are:

Code:

-I 13 -w 256 --thread concurrency 8192 -g 2

My 7970 was having the same issue the OP had with being stuck in the 550s, even though I was at 1050 core/1680 memory.

Then I tried your suggested settings, and my hash rate shot up into the low 600's. I then increased memory back to 1680 and that got me another 20kh/s or so.

I started working my core and memory frequencies up and down, until I found a setting that maximized my hash rate while keeping my system stable.

My final settings are: --gpu-powertune 20 --gpu-fan 0-100 --gpu-engine 1024 --gpu-memclock 1692 -I 13 -w 256 --thread-concurrency 8192 -g 2

Final hashrate is about 710 kh/s if I'm not using the machine, down to 500 kh/s if I'm web browsing.

Thanks for the suggestion, scifimike12!

ditchmagnet

newbie

Activity: 61

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https://i.imgur.com/qotclZT.jpg

https://i.imgur.com/f3JZ7pf.jpg

Those are my clocks. My args: -w 256 -I 20 -g 1 and I let cgminer do the rest.

So, the 7970 sold on Amazon today. So that's cool. NEED MORE CARDS THOUGH! I wish those people on hardforum.com would get back to me!!!

EDIT:

Dropped core to 1140 and bumped mem to 1500, dropped vcore a little. getting 691khash now.

tacotime

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Activity: 1484

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Quote from: mech on April 04, 2013, 10:34:31 AM

"On my 7950 I can get 679khash overclocked"

But how!? Shocked

Core 1100 MHz, mem 1850 MHz

AndrewK

hero member

Activity: 819

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I just chocked it up to GPU binning. Diamond must buy the bottom of the barrel cores.

mech

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Activity: 115

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"On my 7950 I can get 679khash overclocked"

But how!? Shocked

ditchmagnet

newbie

Activity: 61

Merit: 0

Quote from: scifimike12 on April 03, 2013, 09:31:22 PM

Try 875/1375. I found that yields ~608 Kh/s. Make sure power limit is @ 20%.

If you're using CGMiner, my settings are:

Code:

-I 13 -w 256 --thread concurrency 8192 -g 2

Thanks. That did appear to show just over 600khash, but wasn't submitting any shares. Weird.

Quote from: MKEGuy on April 03, 2013, 11:34:15 PM

Quote from: ditchmagnet on April 03, 2013, 08:11:48 PM

GPU usage is right up there at the top. Temps are fine. I am on latest stable drivers, but I did try 12.8 as well. I flashed to the GHZ BIOS, but am back on original. I am now up to 590 khash, and my clocks are 965/1575. At these clocks I would expect much more at -I 20. This card still isn't as fast as the 7950. I really think there is just something about this card.

FYI to get close to or over 700 kh/s, you are going to be looking at RAM clocks in the 1700 to 1800 + territory.

Keep an eye on temps. Sometimes a slight overvolt to the memory can help with stability. I'm running 7970s with Arctic Accelero coolers for this very reason.

At current clocks it should be doing over 600. I expect it to far surpass my 7950, but it cant. Card is borked somehow. Those Accelero coolers are nice though.

MKEGuy

full member

Activity: 154

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Quote from: ditchmagnet on April 03, 2013, 08:11:48 PM

GPU usage is right up there at the top. Temps are fine. I am on latest stable drivers, but I did try 12.8 as well. I flashed to the GHZ BIOS, but am back on original. I am now up to 590 khash, and my clocks are 965/1575. At these clocks I would expect much more at -I 20. This card still isn't as fast as the 7950. I really think there is just something about this card.

FYI to get close to or over 700 kh/s, you are going to be looking at RAM clocks in the 1700 to 1800 + territory.

Keep an eye on temps. Sometimes a slight overvolt to the memory can help with stability. I'm running 7970s with Arctic Accelero coolers for this very reason.

scifimike12

sr. member

Activity: 303

Merit: 250

Try 875/1375. I found that yields ~608 Kh/s. Make sure power limit is @ 20%.

If you're using CGMiner, my settings are:

Code:

-I 13 -w 256 --thread concurrency 8192 -g 2

Keninishna

hero member

Activity: 556

Merit: 500

increase thread concurrency? IDK I just started litecoin mining on my 7970s and cgminer reports 500 kh/s each altho the pool reports them running at 625 kh/s each. I still need to tweak my ram speed.

Topic: 7970 will only mine at 550khash at stock clocks - Lower when OC'ed - HELP - page 2. (Read 5005 times)