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Author Topic: 2x 6870 - what are your settings?  (Read 3247 times)
innervisi0nn
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June 10, 2011, 03:20:33 AM
 #1

Hi All,

I just got a new pair of 6870's today. Been messing around with MSI Afterburner, and for some reason I cant get more than 300 megahashes per card for this.
What settings are you all using?

phoenix -u (user/pass left out..duh) -k phatk DEVICE=0 VECTORS AGGRESSION=12 BFI_INT WORKSIZE=256 FASTLOOP=false

What memclock/core you guys doing?

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June 10, 2011, 05:14:53 AM
 #2

300Mhash/s per card seems about right to me. Are they hooked up with CrossfireX or a dummy plug?

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innervisi0nn
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June 10, 2011, 05:22:06 AM
 #3

300Mhash/s per card seems about right to me. Are they hooked up with CrossfireX or a dummy plug?


It sucks @ 300 mhash/s. the 5830 is $150 and does 302 mhash/s and the 6870 cost me $209 (very unstable, I think i got it working at 1000/400 with 305 mhash/s)

Im using HDMI to my TV for 1 card, dummy for 2nd. Wonder what the diff btw voltage is.

6870 is running 55-56 celcius compared to my 5830 running 62-64 celcius. (6870 much cooler at this point) plus I have it in a HAF case with 3 extra fans.

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June 10, 2011, 05:39:25 PM
 #4

I've got my 2x6870's clocked at 975 core and each gets me 297 MHash/sec using hashkill on 64-bit ubuntu. From what I've seen/read, your numbers are pretty close to optimal at that clock speed on these cards. What kind of 6870's do you have?
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June 10, 2011, 05:54:44 PM
 #5

thats what I'm using.  GPU at 1010Mhz, mem at 1100Mhz.
I'm getting ~300 MH/sec with those settings.  temps are 72-74F

I need to play with MSi afterburner and see if i can do better

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innervisi0nn
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June 10, 2011, 06:36:45 PM
 #6

I've got my 2x6870's clocked at 975 core and each gets me 297 MHash/sec using hashkill on 64-bit ubuntu. From what I've seen/read, your numbers are pretty close to optimal at that clock speed on these cards. What kind of 6870's do you have?

1000/400

i have 2 XFX 6870's in my HAF 922 case with extra 3 fans, 1x 200mm, 1x140 mm, 1x 120mm and im kept cool at 55 celcius. 70% fan

thanks guys!

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June 10, 2011, 07:02:29 PM
 #7

Just ordered all of the components for my new rig with 6870's. Hoping to get her running after the weekend.
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June 10, 2011, 07:21:39 PM
 #8

6870s should be getting more than 300 - I'm getting around 420 on mine - and I'm only running at 930Mhz clock to keep the temperature down.

Disable crossfire.

Use the official amd clock tool AMD GPU Clock tool and that let me change everything.

W

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June 10, 2011, 07:34:27 PM
 #9

6870s should be getting more than 300 - I'm getting around 420 on mine - and I'm only running at 930Mhz clock to keep the temperature down.

Disable crossfire.

Use the official amd clock tool AMD GPU Clock tool and that let me change everything.

W

I was getting the same before I cleaned up the KVM disaster and added the crossfire bridge cables.

what OS and miner are you running.  and what manufacture are the GPU's ?

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June 10, 2011, 07:43:44 PM
 #10


I was getting the same before I cleaned up the KVM disaster and added the crossfire bridge cables.

what OS and miner are you running.  and what manufacture are the GPU's ?


XFX HD 5870 x2 no crossfire
Windows 7 x64
phoenix miner with phatk kernel with params -k phatk DEVICE=1 BFI_INT VECTORS AGGRESSION=11 FASTLOOP=false WORKSIZE=256
AMD GPU clock tweak tool manually tweaking to 939Mhz clock, 343Mhz Memory, stock voltage.
Seeing 420MH/s at 65 degreesC atm... might push the clock speed higher...

W

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June 10, 2011, 07:49:37 PM
 #11


I was getting the same before I cleaned up the KVM disaster and added the crossfire bridge cables.

what OS and miner are you running.  and what manufacture are the GPU's ?


XFX HD 5870 x2 no crossfire
Windows 7 x64
phoenix miner with phatk kernel with params -k phatk DEVICE=1 BFI_INT VECTORS AGGRESSION=11 FASTLOOP=false WORKSIZE=256
AMD GPU clock tweak tool manually tweaking to 939Mhz clock, 343Mhz Memory, stock voltage.
Seeing 420MH/s at 65 degreesC atm... might push the clock speed higher...

W


are you using 5870's or 6870's?

i dont think 6870's can hit 4xx Mh no matter what you do


innervisi0nn
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June 10, 2011, 07:57:58 PM
 #12


I was getting the same before I cleaned up the KVM disaster and added the crossfire bridge cables.

what OS and miner are you running.  and what manufacture are the GPU's ?


XFX HD 5870 x2 no crossfire
Windows 7 x64
phoenix miner with phatk kernel with params -k phatk DEVICE=1 BFI_INT VECTORS AGGRESSION=11 FASTLOOP=false WORKSIZE=256
AMD GPU clock tweak tool manually tweaking to 939Mhz clock, 343Mhz Memory, stock voltage.
Seeing 420MH/s at 65 degreesC atm... might push the clock speed higher...

W

I think you confused us. The 6870 cant go more than 330 mhash/s. You have a 5870 right?

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June 10, 2011, 07:59:54 PM
 #13


are you using 5870's or 6870's?

i dont think 6870's can hit 4xx Mh no matter what you do


sorry - you're right - I'm running 5870s, next time I'll read the topic closer Smiley

W

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