Mutiple GPUs Diablo Miner

[biddicoin]

Hello @ll,

till now I used Win 7 for mining with Bitminter - but I'm not happy with the Win 7 and Bitminter Software as I think Win + the Java app etc - alltogether - use too much power and I would like to start mining with linux. On my notebook I have Linux Mint 13 - which I like a lot.

I tried Linux on my mining rig but the first big problem is, that I can't use all three GPUs (2x7950, 1x5770). If I use catalyst driver+control center I can see that there are 2 more cards - but there is no description on them and no option to activate them. Dummy Plugs are not working/solving the problem.

My second problem is, that I don't know (from the point I can use all three cards already) how I can setup Diablo Miner or Phoenix for my multiple setup.
I searched/googled for hours but I was not able to find an easy instruction on how to setup Diablo or Phoenix for more then one card. Found only instructions for one card.

Thank you very much for your help!

[crazyates]

When I was on linux, I ran aticonfig --initial, but I still had to edit my xorg.conf to show 3 displays. After that, CGMiner ran beautifully.

[biddicoin]

When I was on linux, I ran aticonfig --initial, but I still had to edit my xorg.conf to show 3 displays. After that, CGMiner ran beautifully.

Thank you for this information! Now I'm closer already-  I'll try it later! (the thing with xorg.conf is new to me)

... where can I overclock my cards in linux? catalyst seems not to be the best option for that...

[crazyates]

When I was on linux, I ran aticonfig --initial, but I still had to edit my xorg.conf to show 3 displays. After that, CGMiner ran beautifully.

Thank you for this information! Now I'm closer already-  I'll try it later! (the thing with xorg.conf is new to me)

... where can I overclock my cards in linux? catalyst seems not to be the best option for that...

Unfortunately I havn't used Linux to mine in a while now, so the details are fuzzy, but at least I can point you in the right direction!

I'm not sure about overclocking, as I always used cgminer to do that.

[scifimike12]

You're going to want to separate your 7950's from the 5770 and put it in another rig.  The reason I say this is because I tried the same earlier this year and all I got was BSODs, incorrect hash rates, and miners refusing to start properly.

GCN doesn't play well with VLIW4/VLIW5.

[biddicoin]

Thank you all

I'm using CGminer with linux mint 13 now and everything works fine. After aticonfig every card was supported! (But the "Desktop" has some strange behaviour- but no matter - only for mining no problem (desktop shows everything 3 times where tasks are located)

Win 7 + Bitminter Software = lower hashrates, no chance to use max. clock rates - system crashes, high power consumption

Linux (mint) + CGminer = higher hashrates + max clock rates without system crash! + lower power cunsumption in total

Lets say it like this,

simple amd 2x setup - 3ghz, 2gb ram, 2x7950, 1x5770

Power consumption windows (lower rates, system stable) : 640w  - power consumption high rates (unstable/crash) : >700w

Power consumption Linux - high rates system stable: 580-590w ;-)

Hashrate total ~ 1370 (optimized up to 1420)

(max. with windows stable: 1200 with higher wattage!)

regards


but wait... what is ... the efficiency..... (never seen before with bitminter.. never used CGminer).... is 87% not good? ;-)
(what could be the problem? the mixed cards?)

[crazyates]

but wait... what is ... the efficiency..... (never seen before with bitminter.. never used CGminer).... is 87% not good? ;-)
(what could be the problem? the mixed cards?)

E: is the amount of shares submitted as a percentage of the amount of work your pool sends you. It does not really affect your hash rates or your BTC earned (maybe a little, but barely).

What version of CGMiner are you using, and what pool?

Glad you got everything working!

[biddicoin]

Hey crazyates,

I use the latest version 2.7.5 - still using the bitminter pool (1%fee for more security..) - don't know if I should change... I'm happy atm that everything works fine.

The only thing I'm still on is the "Intensity" - CGMiner instructions says, that going above 9 is showing higher hashrates, but makes no sence and those hashrates could not be true in the end... my setup runs at 9/each card, but 7950 have +8mh/each if I go up to 11-12... still wonder if it makes sense and how I can check what really goes on. Ive almost no rejects - no matter if 9 or 12. So perhaps better go with 12.
 
Atm I have ~  1394 (Bitminter live statistic) - and could add additional 16mh so I would have 1410... not bad for 580w I think ( minus lets say 80watt CPU+System = 500w).

Next thing I'm going to do is flash my GPUs ATI Bios to overclock some more - the temps are still nice at about 72 celsius/1100mhz core (7950)
On the other hand I could lower the memory, which is connected to the core with 7950 - so no lower than 900 possible at 1100mhz.

It's nice to see the power/w drop which every lower memory step :-).

I hope I don't do anything wrong while flashing bios...

ATM you can not download WINE - some pakets are not available - no connection... perhaps its good to give me time think about doing it or don't

Regards


.... the small small tip is from me

[crazyates]

On mine, going from I:9 to I:10 or higher increases MH/s, but introduces 100% CPU bug. If your CPU stays down, and your power stays the same, then go ahead with I:12!

[biddicoin]

Intensity 12 is the point where it gets "hot"... 13or14 is way too much, like you said +50w power more then used with 12, 11 is solid, 12 is possible.. 13 not (worth it)