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video card crossfire question
Old
  (#1)
ccyclone128
Newbie
 
Videocard: hd6870, 1gb
Processor: fx8150
Mainboard: asus sabertooth 990fx r2.
Memory: 1866 ddr3 8gig
Soundcard:
PSU: ocz zt750
Default video card crossfire question - 05-16-2013, 01:23 | posts: 7

can a hd6870 oc edition and a hd6870 cross fire?
are hd6870 oc editions capable of crossfire ?
the damn company sent me the wrong card then the one i ordered, so before i open the box just questions i need answered
thank you.
   
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Old
  (#2)
AlwaysHope
Newbie
 
AlwaysHope's Avatar
 
Videocard: Sapphire HD7870 OC DualX
Processor: FX-6300
Mainboard: M5A99X EVO R2.0
Memory: G.Skill F3-12800CL8D-8GB
Soundcard: X-Fi Titanium
PSU: Corsair AX760
Default 05-16-2013, 01:43 | posts: 36 | Location: Tasmania

Yes, they are compatible for crossfire purposes.
   
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Old
  (#3)
ccyclone128
Newbie
 
Videocard: hd6870, 1gb
Processor: fx8150
Mainboard: asus sabertooth 990fx r2.
Memory: 1866 ddr3 8gig
Soundcard:
PSU: ocz zt750
Default 05-16-2013, 02:01 | posts: 7

ok i opened the box and setup the crossfire.
having major issues crossfire not working correctly.
the oc gpu is set at 920 mhz
the standard at 900mhz
and i'm getting bad flickering and fps is dropping instead of rising
tried altering the speeds to match but no help
running a 990fx mother board (sabertooth) properly hooked up (cards in proper slots) and tried reseating cards and crossfire bridge. no Dice.
somebody assist please.
   
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Old
  (#4)
Fox2232
Maha Guru
 
Videocard: Accelero7970 1125/1500MHz
Processor: i5-2500k@4.5GHz NH-D14
Mainboard: MSI Z68A-GD80[g3]
Memory: 4x4GB 1600MHz 9,9,9,24
Soundcard: Essence ST / AKG K-701
PSU: FSP Gold series 750W
Default 05-16-2013, 05:56 | posts: 1,304 | Location: EU, CZ, Brno

Indeed you got wrong cards for crossfire. 1GB of vram on each is not much, it's just to handle 1080p without SSAA.
Your issue is not in hardware, it's in software.

Provide us following before any real answer to your issue can be given:
Driver version from CCC.
Mobo BIOS date.
Do you use RadeonPro: Yes/No
What OS you are running at. (W-XP/7/8 x84/x86-64)
Which games give you flickering and what kind. (Shadows, Lightning, geometry)
   
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Old
  (#5)
ccyclone128
Newbie
 
Videocard: hd6870, 1gb
Processor: fx8150
Mainboard: asus sabertooth 990fx r2.
Memory: 1866 ddr3 8gig
Soundcard:
PSU: ocz zt750
Default 05-17-2013, 02:43 | posts: 7

bios version 0219 dated 6/11/2012
asus sabertooth 990fx r2.0
catalyst version 13.4 3/28/2013
don't know how to use radeon pro
running windows 7 64 bit

the flickering i'm getting in some games some objects are flashing
and some times i'm getting lines across the screen similar to bad tracking
on a vhs tape, and some games even crash.

the cards alone work in either of the pci-e slots alone but together crash and glitch central.

Last edited by ccyclone128; 05-17-2013 at 02:48. Reason: forgot something
   
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  (#6)
rl66
Master Guru
 
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Videocard: Aspeed + Tesla M2090
Processor: Xeon X5680 x2
Mainboard: Asus Z8PE D12
Memory: 48 Go RDIMM
Soundcard: none
PSU: Corsair AX1200 moded
Default 05-18-2013, 00:18 | posts: 500 | Location: France

those flickering are due to the driver/crossfire and the difference of speed of the cards.

-try flash the normal GPU to the OC spect
-try the new beta driver

good luck
   
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  (#7)
Lowki
Master Guru
 
Lowki's Avatar
 
Videocard: 7970/7950 crossfirex
Processor: i5 3570k
Mainboard: msi z77a-ga45
Memory: corsair vengence 8gb
Soundcard: sound blaster z
PSU: Corsair HX850
Default 05-18-2013, 15:46 | posts: 504 | Location: miami

Enable overdrive in the ccc and try matching core speed and memory speed of the cards. Could try over clocking the non oc or underclocking the oc card. I have a 7950 with core of 960 and memory of 1200 something. Also a 7970 with a core of 925 and memory of 1375. I upped the memory of the 7950 to 1375 and the core of the 7970 to 960 low and behold no more flashing in unigine heaven.
   
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Old
  (#8)
ccyclone128
Newbie
 
Videocard: hd6870, 1gb
Processor: fx8150
Mainboard: asus sabertooth 990fx r2.
Memory: 1866 ddr3 8gig
Soundcard:
PSU: ocz zt750
Default 05-20-2013, 00:23 | posts: 7

ok update
i now have matching 6870's oc same card/company
the crossfire now works but for a short time then the video crashes and screen goes black suspect now i have a heat problem i plan to upgrade my fans tomorrow.
   
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Old
  (#9)
yasamoka
Ancient Guru
 
Videocard: 7970CF @ Qnix 1440p 110Hz
Processor: i7 930
Mainboard: ASUS P6X58D Premium
Memory: 6GB Corsair Dominators
Soundcard: Audio-GD NFB-11.32 +DT880
PSU: CM Silent Pro Hybrid 1300
Default 05-20-2013, 00:46 | posts: 3,086 | Location: Lebanon

Quote:
Originally Posted by ccyclone128 View Post
ok update
i now have matching 6870's oc same card/company
the crossfire now works but for a short time then the video crashes and screen goes black suspect now i have a heat problem i plan to upgrade my fans tomorrow.
Have you tested each card separately for heat issues? How are they spaced when both are slotted in?
   
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Old
  (#10)
ccyclone128
Newbie
 
Videocard: hd6870, 1gb
Processor: fx8150
Mainboard: asus sabertooth 990fx r2.
Memory: 1866 ddr3 8gig
Soundcard:
PSU: ocz zt750
Default 05-20-2013, 03:26 | posts: 7

as far as the cards go the work individually fine they are spaced out in a manner of speaking so an additional card would be able to fit inbetween the two of the cards but they get hot over time running the games. i think the fans i have are not flowing the air properly though the case. i opened the case and ran a bench mark that came with the cards that monitors heat as well as the fps. the fps was fin but heat steadily rose. i ran it both with the case sealed and open. while it was open i put my hand by the cards and felt the heat generated by the cards but the fans were not flowing the air to move the heat through the case.
   
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