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Sapphire 7950 crosfire problem

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  • Graphics Cards
  • Graphics
Last response: in Graphics & Displays
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July 2, 2012 11:04:58 PM

hi folks,this is may configuration:
mb :gigabyte 990 fx d3 http://www.gigabyte.com/products/product-page.aspx?pid=...
cpu amd 6100fx
psu :cooler master 1200W silent pro gold
ram memory: 4gb hyper x
hdd: wd black caviar 1tb
pc case :cooler master HAF 932
and last two sapphire graphic cards 7950,
what is may problem , first I have download drivers for 7950 (12.6 version)then I install drivers but when i run gpuz on First gpu evrithin is fine but on other gpu shows same number of strem procesors as on 7970 but bandwidt is 20gb/s ,i switch the graphic cards place but no improvement again gpu 2 show same preformance as 7970 (number of stream procesor are 2042) bandwith is same 20gb/s , but when i disabled crosfire in catalyst and re run gpuz evrithing is fine i have original spec for both gpu-s.
Can any one help me about this issue , garphic cards are new , I suspect on my mb , could be the chipset problem i insatal drivers for mb from cd ,
i used this card for mobile phone unlocking, evrithing is fine when cross fire is disabled, ihave also another pc for this job evrithin is fine:
http://www.youtube.com/watch?v=fYU1B2ZF8Rc
Thanks in advance for any help.

More about : sapphire 7950 crosfire problem

a c 106 U Graphics card
July 2, 2012 11:23:44 PM

just to be sure, you have the cards attached in the 2 slots that are labled for 16x lane speed and not the single pci-e slot thats labled for 4x right?
July 2, 2012 11:41:09 PM

Yes I have attached them in slots labeled for 16x lane.
:hello: 
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July 3, 2012 12:20:19 AM

dudewitbow said:
just to be sure, you have the cards attached in the 2 slots that are labled for 16x lane speed and not the single pci-e slot thats labled for 4x right?


thanks dude ...
a c 106 U Graphics card
July 3, 2012 12:22:23 AM

Reason why i cant respons much because lurking the internet got me with little results, as i personally dont crossfire and dont know how much bandwidth would be used in such build.
July 3, 2012 12:30:40 AM

dudewitbow said:
Reason why i cant respons much because lurking the internet got me with little results, as i personally dont crossfire and dont know how much bandwidth would be used in such build.


7950 has 240gb/s bandwidth in default mod without overclocking something went wrong in my case when i install 12.6 amd drivers.now I have problems to setup cross fire mod , i have freeze display only when i enable crossfire mod when i disable crossfire mod evrithing is fine, ...
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