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7970 crossfire bottlenecked by my i7? - Page 3

post #21 of 32
So, the answer to the initial question is what?

I am about to do the step of buying 2 7970 and dont know if my i7-960 will bottlenek or not at 1920x1080...
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post #22 of 32
Quote:
Originally Posted by ElGreco View Post

So, the answer to the initial question is what?
I am about to do the step of buying 2 7970 and dont know if my i7-960 will bottlenek or not at 1920x1080...

Any cpu on the market will bottleneck two 7970s. You'll get high FPS regardless with your 960 which is still a fast cpu today.
    
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post #23 of 32
Best bet is to run MSI after burner and check the gpu usage.
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post #24 of 32
No bottleneck with 2 cards. Probablly a little one with 3 cards. 4 cards would be bottlenecked.
post #25 of 32
Quote:
Originally Posted by mad0314 View Post

There is lots of "proof" out there.

Proof of what? That if you build a $1000 gaming rig and play on a 15 inch monitor you will bottleneck? If you're gonna spend the money, you will buy a nice, large monitor that runs at least 1080 resolution, which negates all the bottleneck discussion.

These tests are stupid to say the least, it's completely useless information.

This test proves my statement... look at 1050+ resolution in all the tests. http://www.techpowerup.com/reviews/AMD/HD_7970_CPU_Scaling/5.html There's very little difference in most of the games and in many of them that there is 10+ frames difference the frame rates are already at or above 60 so it will make little difference.
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post #26 of 32
i have a similar question like the OP, but a bit more complicated situation..

i have a 920, but in my new MB (which i bought for Crossfire use) it doesnt really like overclocking. At the moment it's running on stock.
I can get it up to around 3600, but even that is kinda unstable, thanks to Asrock.
(funny thing is, that a 2 year old Gigabyte mobo could run this cpu on 4300Mhz..)

Will a stock 920 bottleneck a 6970 CF setup, running 1920x1080, with maximum possible gfx, AA and everything?

Cant find a review about this, anywhere.
post #27 of 32
Crossfire Reference MSI 7970's - i5 750 @ 4.2 Ghz - 4GB G-Skill 2133Mhz ( 9-9-9-24 ). I have my cards running 1200 core/ 1600 memory for BF3, and 1265 core/ 1800 memory for Bench-marking. Overall my CPU seems to be up to the task ! A month or so ago I ran triple screen eyefinity with BF3 ( 1080P X 3 with bezel correction ). Both cards where at 99% Usage without a hick-up. From my experience an i5 750 is enough @ 4.2 Ghz.

700
post #28 of 32
Old thread, but it was basically asking the same question I would like answers to, so I'm going to revive the thread instead of creating a whole new one...

It seems people say that dual 7970s will be bottlenecked by an i7-920, but I would like to clarify what people deem as a bottleneck. Sure, the framerate may be capped by the i7-920, but at what level? Is it really a bottleneck if the framerate is well over 60fps already? On benchmarks, you will see a difference, of course, but in the real world where very few people have the DisplayPort hookup that actually allows for a signal of more than 60Hz, and a monitor that will accept such a signal, is it really a bottleneck for real world use? Running two 7970s will produce a higher, more consistent framerate than running one 7970, and that framerate will be higher than what any monitor can produce (unless the graphics cards themselves cannot keep up), right?
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post #29 of 32
@ 4.0 would be ok, (you will lose some fps but still perfectly playable) try to push + 200 mhz.
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post #30 of 32
But losing FPS above 60 only, right? I already run at 4.2.
Edited by stargate125645 - 12/1/12 at 6:43pm
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