Author

Topic: 3x Radeon 6870 - Low hash rate. (Read 3518 times)

newbie
Activity: 42
Merit: 0
May 20, 2011, 02:29:27 AM
#8
happen Smiley
newbie
Activity: 56
Merit: 0
May 20, 2011, 01:57:32 AM
#7
you didn't "see" such features in Catalyst, cuz its unmanageable[eside editing bios or using 3rd-party software for GPU control].
try launch MSI Afterburner and check you GPU's clock.

You were right.  Booted up MSI and noticed only 1 GPU was working.   Then I realized I forgot to change device numbers when copy/pasting the startup file.

Fail Sad
newbie
Activity: 42
Merit: 0
May 20, 2011, 01:51:06 AM
#6
you didn't "see" such features in Catalyst, cuz its unmanageable[eside editing bios or using 3rd-party software for GPU control].
try launch MSI Afterburner and check you GPU's clock.
newbie
Activity: 56
Merit: 0
May 20, 2011, 01:03:39 AM
#5
Hey guys,

I've got 3 radeon 6870s installed.  I'm running 11.5 with 2.4 SDK.


One radeon has Mh/s at 280.   

But when I install all three, all three hash rates drops to 90 per.  So total 180 MH/s.

Anyone know whats going ?
maybe power-saving feature of firmware/catalyst ?
try to monitor/adjust cards clocks.
90MH/s is quite low.
6870's usually got 200MH/s or about[per/unit].

I'll uninstall drivers and reinstall.  Might be a bug since I just swapped out a 6950.   And I didn't see any power saving features in the catalyst.
newbie
Activity: 42
Merit: 0
May 20, 2011, 12:45:55 AM
#4
Hey guys,

I've got 3 radeon 6870s installed.  I'm running 11.5 with 2.4 SDK.


One radeon has Mh/s at 280.   

But when I install all three, all three hash rates drops to 90 per.  So total 180 MH/s.

Anyone know whats going ?
maybe power-saving feature of firmware/catalyst ?
try to monitor/adjust cards clocks.
90MH/s is quite low.
6870's usually got 200MH/s or about[per/unit].
newbie
Activity: 56
Merit: 0
May 20, 2011, 12:42:03 AM
#3
They are independent.  No crossfire.
hero member
Activity: 886
Merit: 500
May 20, 2011, 12:27:27 AM
#2
Are you running them independently? Or are you trying to crossfire them?
newbie
Activity: 56
Merit: 0
May 20, 2011, 12:26:06 AM
#1
Hey guys,

I've got 3 radeon 6870s installed.  I'm running 11.5 with 2.4 SDK.


One radeon has Mh/s at 280.   

But when I install all three, all three hash rates drops to 90 per.  So total 180 MH/s.

Anyone know whats going ?
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