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Phenom II 965Be bottleneck 2 6870's or not? +PROOF please - Page 2

post #11 of 13
Quote:
Originally Posted by skullking17 View Post

Well I'm running at 960T at 4 GHz with 2 6850s and I will admit there is a slight bottleneck. On 64 player BF3 severs my frame rate will drop to about 45 - 50 FPS sometimes and my CPU usage is constantly above 95%. That is the only instance where my FPS drops below 60. I would say go for the second 6870. The bottleneck will be fairly small and in most cases not noticeable.

Overclock moarrrrrrrrrrr!Minimize the bottleneck
 
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post #12 of 13
Quote:
Originally Posted by Berke53 View Post

Hi all,

I know.. another of these bottleneck topics. Well the thing is, I searched the whole net about whether 2 6870's in crossfire will bottleneck a Phenom II 965BE and everywhere I look peaple say the exact opposite of eachothers.

- Some say it won't be a bottleneck at all as long as you use high resolutions etc.

- Some say it will be bottlenecked a little.

- Some say it will be severly bottlenecked and that I won't get acceptabel SLI performance. (Some even say that even 1 HD6870 will be bottlenecked by a 965BE.)

Now I already know that it has a lot to do whether the game is CPU or GPU intensive and at wich resolution and graphical settings you play.
But I really wan't to know if it is wise to buy a second 6870. Let's say for Mostly GPU intensive games like crysis or BF3?
Also when u reply can u please post some proof with it because I was told many things already that contradict eachother. I really wan't to know the truth now.
I'm running my 965BE at 4ghz and 2.6ghz NB. I use a resolution of 1920 x 1080 in almost any game.

Thanx on advantage

I think you can safely toss the advice about "not getting acceptable SLI performance" for crossfire 6870s in the toilet. wink.gif

I can tell you this: I have the little brother of the 955 and am Crossfiring the little brother of the 6870: two 6790's (same Barts GPU as 6870) in Crossfire and there is never a time that I hit 100% CPU usage gaming with my 555.

Edit to add: Just to explain what I mean, your 955 should have around +100% performance compared to my my 555 depending on your OC, and the Crossfire 6870s will have about +25% performance gain compared to my 6790's. I am nowhere near bottlenecking my GPUs, so you should have even more headroom than I do.
Edited by Jagged_Steel - 3/20/12 at 6:42pm
    
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post #13 of 13

Considering that board's use of a very low end 4+1 phase setup with only a single transistor per phase (1 transistor, the other should be serving as a driver) and restricted capacity and that you should be avoiding overclocking on this motherboard anyway.... then yes, it'll certainly bottleneck.

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