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6870 Trifire vs 7850 crossfire - Page 3

post #21 of 64
Quote:
Originally Posted by cainy1991 View Post

no I live poorly.. there is a difference..
but still equates to much the same ends biggrin.gif


and I am still damn confused with this vram issue..
due to the fact when I take out the single 6870..
my x2 still reads as being able to use 2gb of memory
from 0-2048 mb.(sits at max 2048 the whole time playing metro with AA)..
and does not reg as crossfire in GPU-Z
but still performs exponentially better than a single 6870

so as far as im aware it tends not to follow rules..


*I would not be surprised if its sensors for Vram are dead?*
but then again.. how play bf3? makes no sense to me...
but I had always assumed the card used a hydra link not crossfire.



There you are... just not following the rules again

x2 = 2GB total VRAM = 1GB of usable VRAM in CrossFire
x2 + 1 = 3GB of total VRAM = 1GB of usable VRAM in TriFire

Not sure what you're not understanding.
 
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post #22 of 64
Thread Starter 
because its not registering as crossfire in gpu-z or in CCC

and how I can play games that are apparently bottlenecked by vram...
without a single problem.. such as bf3(4x edge detect msaa)
crysis 2(4x edge detect msaa) etc...
it performs like a completely different beast to my 4870x2
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post #23 of 64
That "farcry" test is pretty much a joke, since i have friends that easy go up to 50 FPS with thier 6950 (6970)'s ice edition.
I go up to 45 FPS and that with my single 7950 3GB's Ghz edition. (Not stable since i have bottleneck issue of some sort, maybe drivers. Not sure).

But as the dudes here say, Tri-Fire 6870 WONT beat a 7950 or 7970, not by a chance.
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post #24 of 64
Quote:
Originally Posted by tsm106 View Post

That pretty much means you've used up all of your 1gb vram. You keep ignoring that the 6870x2 is TWO gpus. That means when you see AB reporting 2048mb, you have to mentally divide that by two. When you have the third card in there, divide by three, etc.

What he said. When i had my 6990 quadfire set up i was also confused by how the vram usage in after burner is doubled up and you have to divide it in half to get what your vram usage is.

Also there is some nice tweaks you can do in most games to lower your Vram usage if you have windows 7 (Disable Visual themes & Disable Desktop composition)
Edited by Hoodz - 1/16/13 at 3:55pm
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post #25 of 64
Thread Starter 
"That "farcry" test is pretty much a joke, since i have friends that easy go up to 50 FPS with thier 6950 (6970)'s ice edition.
I go up to 45 FPS and that with my single 7950 3GB's Ghz edition."

your comparing max fps with minimum....
two different things...
your 7950 SHOULD be able to hit 60 frames no problem...
my brother 7970 has a higher max frames than me but at 8xAA
and max FOV his min frames are terrible
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post #26 of 64
Quote:
Originally Posted by cainy1991 View Post

because its not registering as crossfire in gpu-z or in CCC

and how I can play games that are apparently bottlenecked by vram...
without a single problem.. such as bf3(4x edge detect msaa)
crysis 2(4x edge detect msaa) etc...
it performs like a completely different beast to my 4870x2

Being playable and maxing something out are two different beasts...

that and VRAM is often over hyped in importance.
 
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post #27 of 64
Thread Starter 
sooo your saying I could be maxing my Vram and not getting as much of a frame drop as others?(aka remaining playable?)

*sigh* english is one complex/confusing language

thanks:D

also any idea why its not showing as crossfire? like my old card(4870x2)
now that Im beginning to think its not actually utalizing(spelling?) hydra...
it kind of annoys me tongue.gif
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post #28 of 64
Quote:
Originally Posted by cainy1991 View Post

sooo your saying I could be maxing my Vram and not getting as much of a frame drop as others?(aka remaining playable?)

*sigh* english is one complex/confusing language

thanks:D

also any idea why its not showing as crossfire? like my old card(4870x2)
now that Im beginning to think its not actually utalizing(spelling?) hydra...
it kind of annoys me tongue.gif


Run gpuz and it will say if its crossfired or not.
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post #29 of 64
Thread Starter 
gpu-z(and ccc) shows as crossfire disabled like I said before.
but definetly provides a major performance boost over a single (judging by benchmarks)

and also now Im confused again.. my 4870x2 reads 2gb of vram but never uses over 1gb..... why does my 6870x2 not do this? (back to idea of dead censors?)
I know what your saying I accept it only has one gb... but now it annoys me why it dose not reg as this like my old card...
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post #30 of 64
Thread Starter 
anyone who knows why gets rep:D


*edit*

*this is why I originally thought it was a 2gb card....
-as my 4870x2 reads 2gb but only uses one..
-but my 6870x2 reads 2gb and uses 2gb(or at least according to ab)
-the 4870x2 registered as crossfire both in gpu-z and ccc
-where as the 6870x2 registers as crossfire in neither..
-there is a massive performance increase using the X2 alone instead of having all three
gpu's in the system and only enabling two of them through crossfire.

I dont know what is causing all of this but you can understand my confusion
Edited by cainy1991 - 1/16/13 at 4:51pm
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