The 7950 Megahash thread

[Fiyasko]

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

I've never heard or seen that bug before
IE all my life, Tried the other broweser every now and again, IE ftw.

I get to 1080 with dropped memory (685) and 1.093v, But poking around the desktop causes the gpu to lockup..
I doubt my gpu would be stable at 1.050, Core 1100, That just sounds crazy, And even 1030core with 1.050v sounds nuts.

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

[Badonkadonk]

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

[Fiyasko]

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

[Badonkadonk]

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?

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.

[Fiyasko]

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

[Badonkadonk]

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

[Fiyasko]

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

[Badonkadonk]

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

[Fiyasko]

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

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.

[Badonkadonk]

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

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.

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

[Fiyasko]

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

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.

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

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

[J3nc]

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.

[noncecents]

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)?

You might reduce thrashing by using a larger workload switch.

[2jase]

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.

[zvs]

I would just do away with the case entirely

[2jase]

I would just do away with the case entirely

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....

[minerbug]

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

[Fiyasko]

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

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

[freeAgent]

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

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.

[Badonkadonk]

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

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