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post #3671 of 22512
So I'm getting poor performance with two 7970s mining litecoins, I talked to some guys in my pool irc and they said my HX850 wasn't enough.

Average 880 Kh/s, Card 1 = 530Kh/s, Card 2 = 360 Kh/s

Here's my config:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

--thread-concurrency 8192 --shaders 2048 -I 13 -g 2 -w 256

GPUs are at 1125/1575

Do you guys agree?
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post #3672 of 22512
Quote:
Originally Posted by axizor View Post

So I'm getting poor performance with two 7970s mining litecoins, I talked to some guys in my pool irc and they said my HX850 wasn't enough.

Average 880 Kh/s, Card 1 = 530Kh/s, Card 2 = 360 Kh/s

Here's my config:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

--thread-concurrency 8192 --shaders 2048 -I 13 -g 2 -w 256

GPUs are at 1125/1575

Do you guys agree?

I get the same. what does -g 2 and -w 256 mean? Anyways mine get 590 at 1125/1575 TC=8192 and I=13 if I bump intensity at all I get HW's and if I up my TC into the 20k range my rate goes down.. So I am as stumped as you are.
post #3673 of 22512
Quote:
Originally Posted by axizor View Post

So I'm getting poor performance with two 7970s mining litecoins, I talked to some guys in my pool irc and they said my HX850 wasn't enough.

Average 880 Kh/s, Card 1 = 530Kh/s, Card 2 = 360 Kh/s

Here's my config:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

--thread-concurrency 8192 --shaders 2048 -I 13 -g 2 -w 256

GPUs are at 1125/1575

Do you guys agree?

Even if your GPUs pull 300W each the HX850 is good enough.

Is the hash rate reported by you pool? Pools always give inaccurate readings. Trust the miner readings instead.

You could also set a higher intensity for that second card.
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post #3674 of 22512
Quote:
Originally Posted by chronicfx View Post

I get the same. what does -g 2 and -w 256 mean? Anyways mine get 590 at 1125/1575 TC=8192 and I=13 if I bump intensity at all I get HW's and if I up my TC into the 20k range my rate goes down.. So I am as stumped as you are.

Ah, someone with a 1300w PSU has the same problem. Good to know.

IIRC -w is worksize and -g is the number of cards or something like that. -g 2 works on 1 card though so i'm not so sure.

Yeah, I have no idea. It would be nice to have 1400 Kh/s mining since I got 700 on my single 7970 before Crossfiring.
Quote:
Originally Posted by TheLAWNOOB View Post

Even if your GPUs pull 300W each the HX850 is good enough.

Is the hash rate reported by you pool? Pools always give inaccurate readings. Trust the miner readings instead.

You could also set a higher intensity for that second card.

Those are readings in cgminer. How do I set the intensity for the second card, just separate by commas?
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post #3675 of 22512
Quote:
Originally Posted by axizor View Post

Yeah, I have no idea. It would be nice to have 1400 Kh/s mining since I got 700 on my single 7970 before Crossfiring.
Those are readings in cgminer. How do I set the intensity for the second card, just separate by commas?
Yes.

Anybody have EVGA 750B PSU? I'm going to run 3 6970s off of it, everything looks very very tight.
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post #3676 of 22512
Quote:
Originally Posted by chronicfx View Post

Should we encrypt our wallets?

I do. Its easy enough and keeps things a bit safer.
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post #3677 of 22512
Quote:
Originally Posted by TheLAWNOOB View Post

Yes.

Anybody have EVGA 750B PSU? I'm going to run 3 6970s off of it, everything looks very very tight.

Those units get terrible reviews. Cheapest caps known to man according to Shilka.
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post #3678 of 22512
Quote:
Originally Posted by axizor View Post

So I'm getting poor performance with two 7970s mining litecoins, I talked to some guys in my pool irc and they said my HX850 wasn't enough.

Average 880 Kh/s, Card 1 = 530Kh/s, Card 2 = 360 Kh/s

Here's my config:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

--thread-concurrency 8192 --shaders 2048 -I 13 -g 2 -w 256

GPUs are at 1125/1575

Do you guys agree?

 

-I 13 -g 2 -w 384 --shaders 2048 --thread-concurrency 8192

 

Quote:
Originally Posted by chronicfx View Post


I get the same. what does -g 2 and -w 256 mean? Anyways mine get 590 at 1125/1575 TC=8192 and I=13 if I bump intensity at all I get HW's and if I up my TC into the 20k range my rate goes down.. So I am as stumped as you are.

 

-w is worksize. I take that to mean bus width.  I get better performance with -w 384 on my 280x's than with -w 256.

 

-g?  I forgot what that means but it does give a little more performance.  Their is a fine though, by just moving from -g2 to -g3 I HW errors.

 

Quote:
Originally Posted by axizor View Post


Ah, someone with a 1300w PSU has the same problem. Good to know.

IIRC -w is worksize and -g is the number of cards or something like that. -g 2 works on 1 card though so i'm not so sure.

Yeah, I have no idea. It would be nice to have 1400 Kh/s mining since I got 700 on my single 7970 before Crossfiring.
Those are readings in cgminer. How do I set the intensity for the second card, just separate by commas?

 

I have a 850 watt powering two 280x's.  I just disabled crossfire so I can game on just card and still mine on the other one.  I get 700kh on both cards.


Edited by BackwoodsNC - 12/1/13 at 7:39pm
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post #3679 of 22512
Quote:
Originally Posted by chronicfx View Post

Anyways mine get 590 at 1125/1575 TC=8192 and I=13 if I bump intensity at all I get HW's and if I up my TC into the 20k range my rate goes down.. So I am as stumped as you are.

This exactly. Raising -i anything past 13 leads to HW.
Quote:
Originally Posted by skupples View Post

Those units get terrible reviews. Cheapest caps known to man according to Shilka.

lol ok
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post #3680 of 22512
Quote:
Originally Posted by skupples View Post

Those units get terrible reviews. Cheapest caps known to man according to Shilka.

Well, I'll run 3 5850s off of it instead. It won't be the worst though, I have a Thermaltake TR2 700W. It's 70% efficient and I'm gonna run 2 underclocked 6970s on it. Wish me luck guys.
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