Topic: The 7950 Megahash thread (Read 27640 times)

he is probably mining ltc

make sure you dont have -disable gpu in the command line

If you're trying to mine bitcoin with a GPU right now, my advice is to simply stop and spend the money you would have on the extra electricity on simply purchasing Bitcoin directly.  Unless you get free electricity and don't mind the extra wear and tear on your GPU and computer in general, it's not worth bothering.  You will get very little out of GPU mining now.

Have you tried running the AMD driver cleanup utility and then installing the latest drivers?

Hey there, i have some problems

i do also have the 7950 but when i use cgminer it says "no devices detected" can anybody help me

Would love to but I live in a small apartment so the box is in my living room. Tiny hands, paws, not-so-small hands, etc would find their way in. Now, if I lived in a house with a basement I'd have crate miners with a box fan and some custom cardboard ducting....

I would just do away with the case entirely

I know this is an old thread but I've managed to get my hands on 4 different models of 7950 and found that they vary widely in what settings they'll take even within the same maufacturer.  I track all settings in a spreadsheet: core, memory, intensity, MH/s (or KH/s for scrypt) and fan speed and temp.  Tune each card until you squeeze out that last bit of performance then drop each setting back a notch to keep the card from burning out.  The best results I've seen so far run from 580MH/s to 640MH/s.

Don't underestimate the importance of cooling, by the way.  In a generic case my cards ran 20C hotter than in a Coolermaster HAF with big fans. On a whim I put a small Vornado on top of a Coolermaster XB which dropped the two cards in there another 5C.

Windows and Linux seem to perform about the same with the same settings but Windows draws up to 20W more power when idle and 40 when doing housekeeping since it revs up the HDD and CPU.

If anyone's interested in my specific cards and settings let me know.  All of my benchmarking has been done by hand so far but I'm working on a script to do that for me.  PM or post if you want a copy once it's finished.   It'll be BASH so meant for Linux but it should work on cygwin and since it's using cgminer's API you could run it on Linux or Mac and point it at a Windows box.

You might reduce thrashing by using a larger workload switch.

I'm doing 500mh/s with core @950mhz. I can go higher clock but the increase in power is not worth the extra hash. If you are using cgminer try this flags -w 384 -g 8 -I 11. I went from  470mh/s using 4 threads to 500 using 8 threads. Let me know if you try this and see increase in speed.

Just drop the intensity, 54fps on BF3 here, Yes i have AA on~

thougt about trying that, but playing fps games like bf3 and black ops 2 framerate is everything

My single GPU gaming rig (the one that we've been doing all this tweaking on) never has it's gpu turned off, Not even for gaming, I just drop the intensity
I love bitcoins.

was building gaming systems when i started on them, so didnt go for the cheap crap
since my flat mate moved out im using 1 as dedicated and the other as semi dedicated, turn on / off 1 card when gaming

Ah, A Corsair. One of the best PSU brands around

http://www.overclock3d.net/reviews/power_supply/corsair_ax_1200w_atx_psu_review/1

Freaky lucky sob, Or I have dirty power coming from my supply, Or some Shat like that.
What PSU do you have?

rofl
i dont know why my card works with so low voltage, both my machines are identical with 2x xfx 7950 black edition single fan.
and on both machines, the card with the monitor hooked up too it, uses .995v as stock. the other 2 cards are same voltage as yours, but them i run at higher clocks so i dont care.

theres nothing wrong with your card so the manufacturer will prob not send you a new one, and im not going to tell you to void your warranty.
thats up too you

12.11 beta are a bit glitchy when i play games.
or watch youtube etc while mining.
and the drivers dont have anything to do with the voltage, has been like that since i got them.

ps: my cards are still stock, havent changed the paste or anything, but i am looking for a "cheap" watercooling system for my cards tho.

What the crap! Thats so gorgeous! What brand do you have? mines an XFX ghost, What should i do? Just tough it out? Void the warrenty with new thermal paste? Send the card back for somereason and try to get a new one?

I wonder if 12.11 has anything to do with it...
On that topic, Why isnt your 12.11 all glitchy and artifactfy. Your 12.11 looks like its running just fine... I had to rollback off of it to 12.8 because of how Garbled it made my screen when i mined

my current config, and as you can see, its pretty damn doable with .995v

K, Sooo, 1.056v= core 1034, mem 685 and poking the desktop crashes the gpu

i understand 1.093v is stock voltage, but lowering the memory means you will require less voltage aswell.
meaning you should be able to undervolt the card, wich will then generate less heat
like all oc`ing its just trying it out and see what works for you.

if your using firefox you could check out this thread. or just switch to chrome
http://forums.anandtech.com/showthread.php?t=2200742

if your not using firefox i got no idea about the spike

*nods about gpu differances and tweaking is special and doesnt want to void the warrenty so early in the cards lifetime*
1.050v? My stock voltage of 1.093v gets me to 1060, And 1.106v gets me to 1100


Also, Could you look at the image i posted and tell me whats up with the voltage spike? Is that just an error?

you can safely run your voltage up to 1.25. max on your card is 1.3...
not sure whats up with the stock voltage tho, my main card wich the screen is hooked up too i get 0.995 as stock, the others i get 1.093 aswell. but the one with stock 0.995 i can run at 1080/685, any higher clocks and i have to up the voltage.

with the voltage you set there i would up the clock to 1150 atleast. or turn the voltage down to 1050.
keep in mind that turning down you memory, lowers the voltage usage. (and heat)

81c isnt a problem at all, this summer my cards went up to 94c, when it passes 100c it will just shut down.
if you open your case and set a table fan up to blow streight in too your pc you can drop the temps down quite a bit.

you can always re-apply some thermal paste, its easy and cheap, and in most cases you will get lower temps since they tend to overdo it at the factory and use shit paste.

ps: and remember that even if a gpu is the same model and make, they are all different and they might not respond to the same oc abilities.

tweak away my friend

Spooky voltage spike.... Wtf...

My cards' stock is 1.093v....

Yeah i REALLY misread how much you guys are upping your voltages by, I seriously coulda Blown my card. Running at 1.131? Fucck thaat I was running that for a little while...
I just ran overnight with 1100core 1.112v and it turns out that ran overnight, But upon using the computer for a little bit at the clocks of 1100c 720m the "amd graphi-blah-stop resonding"
My card reaches 1060core stock without crashing. I've set my fans so that the temperature never peaks over 81°c ... But is that too hot? My 6990 was running at 89° for a Long time
I really hope i havent hurt my card, I think i may have indirectly done something to it's thermal paste tho

what kind of crash?
hard stall?
driver crash?
bsod? (if so what error are you getting?)
what drivers are you on?
your settings dont look too off other then you are slitely high on the voltage, and temps are good.

try setting your voltage down, you can run stock 0.995v at 1060-1080 core on most cards. try setting it to 1.050v at 1100 core
do some tests with gputool and check for artifacts

Hey ckolivas! glad to see you stop in here!.

Guys anyone think I might have damaged my card? I was running my card at 1.118v 1100core 800mem for about a week happily with the fans at 80% and the temperature at a Stable 80°c (peaking at 81° in the evening, dropping to 79° at night)

But now it likes to crash at those values I've checked for dust etc, Cleared it out incase it was temperature related.
I have a singlefan XFX 7950 ghost

tbh i got no clue about the settings, as you just pointed out
just going with what ive read up on here on the forums hehe.

but it seems to be working atleast, highest mh/s ive seen anyone report so far on 7950
only thing ive been trying to perfect is the oc

By the way, does nothing unless you're mining litecoin. also does nothing because they're the defaults in cgminer for that hardware. So the only thing you need to set is an intensity. Intensities above 9 on windows tend to increase CPU usage.

just set a new (personal) record with my 7950`s

1245/685 @ 1.185v 664mh/s @ 79c (single fan cards in a closed case still)
running CGMiner with "--shaders 1792 --intensity 10 -k poclbm -v 1 -w 64"
and using 12.11 beta drivers

 

none of the 79xx cards are locked in memory so to speak, just takes some tweaking to do it, like afterburner...

i havent worked much with linux yet so im not sure what you should use there, but a quick google search should point it out to you pretty easy.

im still working on installing cgminer on my raspberry pi (wheezy) and my pentium 4 (ubuntu) for my asics... good thing i got some time til they come lol.

Some 7950's are weird and have a crappy "qwirky" bios, Disallowing memory clock reductions through common methods, I think it has something to do with the card bios writer trying to make sure that the ULPS works

What Brand of 7950 do you have? My XFX works great

oh Afterburner, well I use ubuntu...

and with CGMiner it is NOT possible to go lower... (only 150 below engine)

But its only with 7950... my 5770 no problem

using the built in fetures in cgminer is all fine and dandy if you allready know what clocks to use on your cards yes.
but to find a stable clock i would recomend using AB and stress testing the gpu...

Or don't use afterburner at all and just use the built in memory/gpu clock adjustments with CGMiner.

change out the bottom part of afterburner.cfg with:


[ATIADLHAL]
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 2
AccessibilityCheckingPeriod   = 0
UnifiedMemoryUsageMonitoring   = 1

how do you lower your memory? With my two (different) 7950 - it is locked. I can only go 150mhz below engine....

as long as you have descent cooling it shouldnt be a problem, atm i got the single fan xfx 7950 black edition cards, ive been able to run them stable at 1200/685 but it got too hot for my taste as i dont have risers etc.

ive seen tests on youtube where they run these cards at 1200/1500 @1.25v getting over 10k scores in 3dmark etc with air cooling. but thats with 1 card in the case, so they wont get as hot as with multi card gpu "farms"

if it wasnt for asics id be getting watercooling for the cards and running them all at 1200/685 atleast

edit:
im running the 12.9 beta drivers atm if that helps.. when i switched from 12.3 (i think it was) to 12.8 the temps spiked up ~10c.... 12.9 seem to fix that issue

Woaaaaah I Really dont think my (stock 900) 7950 is gonna reach 1175, I also dont want to kill my card...
I updated my drivers to cat 12.8 from 12.6 and gained 40mh/s

try setting your clocks at 1175/685 with voltage at 1150.

"cgminer -o server -u username -p password --shaders 1792 --intensity 14 --worksize 256 -v 1"

im getting ~638mh on my 7950`s @ 80c in a closed case... (downclocked the one i have the monitor hooked up to cause it seems to run a bit hotter, 1075/685 @ stock voltage getting 550mh)

That sounds about right.

I'm running 2x 7950s

BFGminer... the only parameter I feed it other than pool info is -i 9,9

with core of 1075, voltage of 1135 and memory at 625 I'm getting 560 mhash each.

This is on a 2700k on a Z77x-ud5h motherboard while mining litecoin on the cpu.

try using diablo miner, im currently running 2 rigs with "DiabloMiner-Windows -o yourpoolhere -u username -p password -r 8337 -v 1 -w 256"

at 1100/675 and 1050/675 im getting 1150mh on each rig (2 cards in each)... could clock higher but using closed cases so temps get a bit high...

So whats with nitrox getting 54xmh/s....
I can mine at 1080 stabily, but i only get 515mh/s

Yep that's 100% on one core. Mine was 33% on a tri-core AMD, so that'd be 100% on one core.

16%cpu usage at I 13, on a 6core 3.8ghz cpu, with the affinity set to two cores

Check your CPU usage. Anything 10 or higher, and I get 100% cpu bug.

Seems to have worked... Sortof... It's really bouncy.. dropping 5 below and going 10 above..

Shame how i have to be clocked at 1080 to get the meager 511mhash/s
Why the hell is nitrox hitting 54x+ with a 1080 core clock... Im trying to use all the same settings that he's using..

i run my two HD7950 with .bat that content:
i use logs for detailed monitoring

I of 7 and 9 gave me similar results, but 13 gave me +10MH/s.

woo hoo!

Acutually, Shappires latest line of cooling is really good.
My XFX is running at core 1080, Mem 800, Fan 73%[4100RPM] Temp 78°C room ambient temp is 27°C
Inside a cheap $60 Xion case with 4case fans, 1PSU fan, 1 GPU fan, 1PciSlot CoolerFan for the GPU, One CPU LCU Radiator cooling fan
Now with Intensity 7 and 9 giving same results, I am mining at 510Mh/s

impressive. is that mineral oil immersed or what?

Well just trying to throw it out there. This thread has me playing with everything I can to get the most MH/s.

v 1 seems to work the best, Bringing my memclock upto 1ghz gave me an extra 10mh/s

Like I said before, I"m using a 7970, not a 7950, but I dropped the "-v 2" arg out, and I got +20MH/s. Try letting CGMiner decide what vectors are best.

It would be helpful if you stated your settings, so far i see intensity CG miner 2.7, And diablo kernal, Im using those
Like holy hell, Your (according to that chart) hitting 547mh/s with a core of 1070
What is the "powertune" 15?

Fwiw im using this card http://www.newegg.ca/Product/Product.aspx?Item=N82E16814150601

I don't have a cooling problem (card stays below 90c, it's a single-fan model), though your temps in the mid-60s are very impressive.  Having essentially an open-air case helps in that regard   I built my PC for silence and as long as I stay within acceptable ranges, I'm not too concerned about the temperature.  When I'm not mining, you can't tell my computer is on

send me pictures of your case, will help you to optimize cooling.
GPUs is
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1450&psn=&lid=1&leg=0

two are the same, I buy them in 7 days difference, and they are different revision

I forgot to mention I use CGMINER 2.7.0 with kernel DIABLO   

mode by my own

www.shareimage.org/images/85k1ikroyxudomlgen5.jpg
www.shareimage.org/images/uxeu2lqv3sueaa92ld53.jpg
www.shareimage.org/images/vpom3gi38anc83b6ie7.jpg

and this is summer addon

www.shareimage.org/images/fn410etlca8ijabgdoqz.jpg

now the room is 28C, outside 27C - 23:21
day outside is 41C, room is 34C - 12:00

I can't wait to come winter to overclock a little be more

Stupid Trend Micro. I can't see the pic until I leave work.

What sort of cooling are you using in your case/GPUs?  Those temps are crazy low.

i run two HD 7950
they are different revision but that i run them



I hope I was helpful.

Can you post either your full command line arguments, or your config file? Don't need any pool info, just the GPU settings.

Does anyone else have any insights as to why im missing 20mh/s? It's not like im looking for that "Maximum efficency" I just want to see my card it 500.01MH/s

1De7KzFiYRHUVJCuy7Ap89xYbu2Z4q1F63 Thanks!

hey crazyates d'you have a coin address that i can kick you a tip at?

Yeah, Going from 4 to 5 gives me 150mh/s lol.
Gonna try DiakGCN Gives me 450mh/s

Ok I was just curious. Sometimes I can get upwards of a 10MH/s bump going from 6 -> 9.

8, I went back, A set it to 9, Turns out that the last time i didthat, At the same time the pool switched blocks, LOL.
I 9=487-491.3mh/s
I 7=486.8-493mh/s

Setting I to -8 or 8? There's a big difference 

Really?! That's pretty odd.

Try changing your I from 7 -> 9.

Set it to these settings, Now im getting 490mh/s

Hellyeah it's stable, It's stable at 1080.

I've flipped around the kernals, getting/loosing 10mh/sec
Phatk seems to do the best, Im gonna retry diablo, Since i think it'd be the best

Try using Diablo kernel instead of Poclbm.  Change the intensity to 7, worksize to 256, and vectors to 1.  That should yield the greatest results.

You can change the settings by press S → W → ENTER.  That will great a configuration file so you won't need to re-enter the same settings as before.

That's your rate on a 1040Mhz core clock!?!?  I get 480Mh/s on 925Mhz using --intensity 5 as my only switch.  I'm on the same OS/driver/SDK version as you are as well.  Something is very wrong with your setup.  Are you sure you're operating at 1040Mhz core (and it's stable)?

LOL, I forgot all the important info!
64bitwin7 12.8, 2.7
How do i tell CGMiner to use a differant kernal? Whats the command line arg?
I think inside the config i can set it to a differant kernal... Im going to poke around..
THANKS!, Im pretty sure it's the kernel,

That does sound a little low, but not drastically. What OS/driver/SDK? Try switching kernels? CGMiner also has diabo, phatk, and diakgcn, all of which should be decent. On my 7970 I use "-v 2 -w 256 -I 9 -k diakgcn" and it works great (Win7x64SP1, 12.8, 2.7 here).

@1040MHz you should be getting close to 520MH/s.

So what am i doing wrong? Core 1040 mem 700
I've flipped around with the intensity obviously, Im running CGMiner 2.7.0
Im getting 468mh/s, And yet on https://en.bitcoin.it/wiki/Mining_hardware_comparison I see a guy hitting 512mh/s with a 1ghz core, Using Poclbm
When i run poclbm i get 475mh/s
Why isnt CGminer being as godly as it used to be? Do i seriously have to switch back to a different miner just to increse performance? I love CGMiner!

EDIT-I've followed some advice written below, And got the hashrate upto 493

Edit- Upgraded to Catalyst 12.8 from 12.6 and now im at 550mh/s at Core 1050
Edit3
Im using CGminer 2.9.7 now, With Diablo Kernal, Vectors 1, w256, Intensity 7 (using intensity 11 gives 6 more mh/s, but the lags not worth it)
576MH/s