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can a 6870 & 6850 be crossfired? - Page 3

post #21 of 29

This might be a good link for you to check out  4LC4PON3  ... http://techgage.com/article/amd_radeon_hd_6870_hd_6850_in_crossfirex/1 
 

Quote:
Originally Posted by 4LC4PON3 View Post
Thanks kings and everyone much appreciated. Some awesome info here

 

Well ... I'll grant you things don't always come off in the real world  the way they are intended to on paper ... the way I outlined it IS the way AMD outlines it is SUPPOSE to occur ... now individual games / benchmarks and drivers may not fully take advantage or utilize the process this way 100% of the time ... but it's what is suppose to be going on if everything is working correctly tongue.gif 

 

Quote:
Originally Posted by wedge View Post
I'm not sure about that. It is far too difficult to predict how long each frame would take to render on each card (Edit: That's the reason why micro-stuttering occurs even on two of the same card). Which would mean that the load cannot be dynamically distributed.
My own observations verify this to be true. The slower card is fully utilized, and the faster card is about 10 - 15% less utilized. Which means the work is being divided evenly, and the faster card is left "idle" for part of the time. If the work was being load balanced, then both cards would be fully utilized.


And if you read this link ... http://www.hardwaresecrets.com/article/391

 

 

 


Edited by LA_Kings_Fan - 2/17/12 at 4:11pm
   
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post #22 of 29
Thread Starter 
Quote:
Originally Posted by LA_Kings_Fan View Post

This might be a good link for you to check out  4LC4PON3  ... http://techgage.com/article/amd_radeon_hd_6870_hd_6850_in_crossfirex/1 
 

 

Well ... I'll grant you things don't always come off in the real world  the way they are intended to on paper ... the way I outlined it IS the way AMD outlines it is SUPPOSE to occur ... now individual games / benchmarks and drivers may not fully take advantage or utilize the process this way 100% of the time ... but it's what is suppose to be going on if everything is working correctly tongue.gif 

 


And if you read this link ... http://www.hardwaresecrets.com/article/391

 

 

 


Thanks for the link I will give it a read.

 

 

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post #23 of 29
If I'm reading that chart correctly, does it not imply that a 6790 is also compatible with the 6850 and 6870?
post #24 of 29
a 6850 can be used on a 6870 X2, for optimal performance tho don't use anything less or more then a 6850 and a 6870 smile.gif
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post #25 of 29
Quote:
Originally Posted by Kr0n1k View Post

If I'm reading that chart correctly, does it not imply that a 6790 is also compatible with the 6850 and 6870?

Yes it can. All three of those cards are based on the same chip. AMD broke their naming convention for some reason. Don't get me started on that...
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post #26 of 29

It CAN ... but it's missing the Black Dot in the grid ... so it's NOT a RECOMMENDED crossfireX configuration. wink.gif
 

Quote:
Originally Posted by Kr0n1k View Post
If I'm reading that chart correctly, does it not imply that a 6790 is also compatible with the 6850 and 6870?


 

   
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post #27 of 29
Iv seen some reports of people unlocking a 6790 into a 6850 with a bios flash and a bit of voltage to stablise it.
But I dont know how true that is since I havnt seen it done personally.

Maybe give that a go if you have the time but be sure to back up the current bios on it and get a bootable USB stick with ATIFlash setup incase it doesnt work so you can flash it back.
post #28 of 29
Thread Starter 
Quote:
Originally Posted by bmgjet View Post

Iv seen some reports of people unlocking a 6790 into a 6850 with a bios flash and a bit of voltage to stablise it.
But I dont know how true that is since I havnt seen it done personally.
Maybe give that a go if you have the time but be sure to back up the current bios on it and get a bootable USB stick with ATIFlash setup incase it doesnt work so you can flash it back.


im not even going to mess around with that. Just going to install OC a bit and play. I am not the type who wants to screw around all day long messing with things. I really just like to install and play. Its one of the reason why I really dont OC to me it takes time & takes away from my gaming.

 

 

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post #29 of 29
Thread Starter 

So I went and picked up my 6850 from the post office & I got both cards running in Crossfire. I am not sure but which driver is the best for Crossfire ATM & I had a question. I have a Sapphire 6870 & the fan runs at 21% but the new XFX 6850 fan is running at 41%. Not sure why the XFX fan is running faster then the Sapphire. How does this score look for crossfire

 

 

 

Heaven.png


Edited by 4LC4PON3 - 2/25/12 at 10:09am
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