7950 - Hashrate 400 Mh/S Help!

I have a sapphire 7950. It came clocked like this:
GPU Clock: 925
Memory Clock: 1250
VDDC: 1250

This card is in a PCI 2.0 X16 express slot
I have 8GB of Ram.

I am using the 13.4 Catalyst Drivers and I think the 2.8 SDK.

I never go over 75 celcius and my PSU is 730W

I am using CGminer 3.01 and running this:
cgminer -o stratum.bitcoin.cz:3333 -u Draxus.worker1 -p C --shaders 1792 --intensity 16 --worksize 256 -g 1

I cannot get it over 470Mh/s....I know some people claim to get up to 600...what am I doing wrong?

Thanks for any help!

Some of your commands aren't really doing anything, and may actually be hurting performance. For example: the --shaders option only works when you're mining LTC (or any other --scrypt alt-coin). Your intensity should be set to ~7, and anything over that will actually hurt performance. You also don't need to set the threads and worksize, as the CGMiner defaults for your 7950 (Poclbm v1 w64 g2) are actually the best you're going to get (confirmed by many others, as well as myself).

And lastly, BTC mining is very GPU Engine intensive, and almost completely ignores the GPU memory. You want as high of an engine clock as you can manage while still being stable, and then you can underclock your RAM with no hurt of performance (while helping to keep the temps and power consumption lower).

Try this command:
cgminer -o stratum.bitcoin.cz:3333 -u Draxus.worker1 -p C -I 7 --auto-gpu --auto-fan --temp-target 70 --gpu-fan 40-90 --gpu-engine 600-1000 --gpu-memdiff -150

Keep upping that bolded number by 5-10MHz until it crashes, and then reboot, and set it to ~25MHz lower than when it crashed. If it keeps crashing, clock it a lil lower. Your goal is to OverClock as much as you can while stable, and then let CGMiner manage the rest.

Download MSI Afterburner.

In the settings increase max power to +20%.
Tweak your clocks; I like GPU clock @ 1100. Your mem can be whatever - try 800. I also use the auto feature in msi afterburner (you can scale with temps).

Then you can just use -I 9 flag in cgminer (I personally just use guiminer). You don't even need any other flags.

This gets me 575 mhash easy. You can push the card to 1200 at get 610.

I run a bit hot (high 70s), but I think that's okay. At 100% fans it's low 70s, but then the gf gets upset.

so in summary 3x 7950 will get you ~1800 mhash.

Enjoy!!

My 7950 Sapphire Dual-x HATES CGminer, it doesn't report correctly

EDIT: Just rebooted my comp and relaunched CGminer...I avg 522 and very stable, going to let it run for a bit and see how it does

So I tried that CG Miner Configurations and I got about 499...just didn't want to break 500 haha.

If I mess with Afterburner I can get this.....So this was running stable and then my screen starting flickering. I had the same issue in CGminer when I increased the 1000 number. Does flicker mean my card is messed up? Or does that mean just slow it down?
http://anonymouse.org/cgi-bin/anon-www.cgi/http://img19.imageshack.us/img19/1917/miningos.png

I have a flicker now and then with my settings using the catalyst overdrive system

Ya my 7970 is OC'd to 1200MHz, and I get little graphic glitches and flickers sometimes, esp when using Chrome. It's not bad, and doesn't hurt anything. The only thing you gotta worry about is when your driver crashes or freezes, then you've OC'd too far.

If you can go to 1100MHz in MSI AB, try the same settings in CGMiner. I bet you'll be closer to 550MH/s.

cgminer -o stratum.bitcoin.cz:3333 -u Draxus.worker1 -p C -I 7 --auto-gpu --auto-fan --temp-target 70 --gpu-fan 40-90 --gpu-engine 600-1100 --gpu-memdiff -150

The nice part about CGMiner compared to GUIMiner is it will actively monitor the temperatures to make sure you won't damage your card. The settings I gave you will adjust the fan, and even dynamically lower your overclock to prevent overheating, thus saving your card from damage.

Quote from: crazyates on April 30, 2013, 04:21:11 AM

I am using this new line of code and the 1100 seems to be running fine...however I am averaging 504....earlier when I was 1000 my average dropped to about 504.

I am using a PCE express 2.0 mount on my mobo, could this be limiting it? Or maybe I should downgrade my Catalyst (13.4). As of right now I am thrilled I am maintaining 500 and not crashing, I am just not sure why I am still lower.

Thank you so much for your help!

http://imageshack.us/a/img90/8899/mining2w.png

EDIT: Just realized in my picture that my core clock is only running at 955MHz even though the code will let it run up to 1100. I am guessing then that my issue is heat, its not letting it go any higher to maintain at 73 Celsius and 90%fan

we have the exact same card, your Unicode is good... mine SUCKS

increase your intensity to 13

Sorry, what do you mean by unicode?

Quote from: bitterdog on April 30, 2013, 05:04:58 AM

we have the exact same card, your Unicode is good... mine SUCKS

increase your intensity to 13

your Unicode is U:7.1/m

Yep, it looks like the card is getting too hot, and CGMiner is throttling the card down to lower the heat. That's the nice thing about that CGMiner setup - more cooling = better hashrate while still keeping your card at acceptable temps.

And U: doesn't stand for Unicode. Your U: is the number of accepted shares per minute. ~7 shares per minute is right about what you'd expect for ~500MH/s, so everything is good. You don't need to increase the intensity to 13, as that may hurt performance.

Quote from: bitterdog on April 30, 2013, 05:04:58 AM

we have the exact same card, your Unicode is good... mine SUCKS

increase your intensity to 13

LOL "I can't get my card to work right, but you should take my advise on tweaking your settings so you can be just like me!"

That is actually a very nice feature with CGminer...I may have burned my card out had I not known. Anyway, so is it safe to run my fan non stop at 90% and is a steady 73celcius a good temp for card longevity?

I guess my next step is to get more fans for my case haha

Quote from: Draxus on April 30, 2013, 05:49:41 AM

That is actually a very nice feature with CGminer...I may have burned my card out had I not known.

Glad you like it, I spent a lot of time on that code

Quote from: ckolivas on April 30, 2013, 06:18:02 AM

Quote from: Draxus on April 30, 2013, 05:49:41 AM

That is actually a very nice feature with CGminer...I may have burned my card out had I not known.

Glad you like it, I spent a lot of time on that code

Can you take a look at my thread and help me plz solve the low U:
https://bitcointalk.org/index.php?topic=190421.0

So just an update, I have been averaging 500 Mhash/sec pretty constantly and have been very happy with those results...however yesterday I cleaned out my case fans and am now getting 515Mhash/sec on average Roll Eyes

So moral of the story....if you are in a case keep it clean hehe

Quote from: ckolivas on April 30, 2013, 06:18:02 AM

Quote from: Draxus on April 30, 2013, 05:49:41 AM

That is actually a very nice feature with CGminer...I may have burned my card out had I not known.

Glad you like it, I spent a lot of time on that code

Now that I understand some of the commands in it, I can't believe I used anything else Grin

Thanks for developing it!

last version drivers
1000 core at 59°
525 MH/s

i wasn't aware that i need to clock to 1100-1200 for 600 MH, i remember that this card can reach 500 on 925 core, maybe i remember wrong lol

Quote from: Draxus on April 30, 2013, 05:49:41 AM

I run with my case cover off and my GPU's rarely reach 80% on the fans with a target temp of 60 on one and the default 75c on the other.