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i7 970 bottleneck 7950 cf?

post #1 of 12
Thread Starter 
Hey guys, I'm planning on grabbing another 7950 to crossfire soon and was wondering if my cpu would bottleneck it? I'm running the 970 at 4ghz at the moment and can go up to around 4.4-4.5 before voltage requirements get kind of high.
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post #2 of 12
The i7 970 is a powerful processor and at 4.4 GHz I believe it shouldn't be the bottleneck for those cards.

Edit: After further research, people are running the 970 with GTX780 Sli, so you're safe. thumb.gif

Enjoy OCN mate!
Edited by CULLEN - 9/19/13 at 4:51am
post #3 of 12
Depends entirely on the game. Some, your single 7950 won't be utilized even to 50% load at times, others will load two cards to 100%, depends on settings, resolution, game and what you are doing in it etc
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post #4 of 12
No, it shouldn't be a bottleneck at all unless a particular game is just horrendously optimized, in which case newer processors are likely to be bottlenecks as well.

Of course, you could always upgrade and sell me your MB+CPU for super cheap. My QX9650 is getting a little long in the tooth. thumb.gif
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post #5 of 12
id say no, the 970 still is no slouch at anything.
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post #6 of 12
Quote:
No, it shouldn't be a bottleneck at all unless a particular game is just horrendously optimized, in which case newer processors are likely to be bottlenecks as well.

I'm CPU limited at times on a 4770k @4.6ghz in Borderlands 2, dropping my single 770 below 70% load, just from randomly playing singleplayer. A whole lot of games hit CPU limits especially when you have a lot of GPU power, because you're demanding nearly twice as much FPS from the CPU when you drop in another card.

I upgraded from a 950@4ghz to 4770k@4.6 on single GPU, and it's kinda a massive deal for a lot of games, don't make it out to be nothing when you have twice as much graphical power so you're demanding almost twice as high FPS from the CPU

I could name quite a lot of modern games (just ones i had interest in) that hit CPU limits on one high end GPU and haswell, but for two gpu's and a CPU a large gap behind in singlethreaded performance, it's easier

Don't take my word for it, grab a second screen and throw up task manager, msi afterburner, watch individual CPU cores and GPU usage in various games and situations
Edited by Cyro999 - 9/19/13 at 4:59am
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post #7 of 12
Quote:
Originally Posted by Cyro999 View Post

I'm CPU limited at times on a 4770k @4.6ghz in Borderlands 2, dropping my single 770 below 70% load, just from randomly playing singleplayer. A whole lot of games hit CPU limits especially when you have a lot of GPU power, because you're demanding nearly twice as much FPS from the CPU when you drop in another card.

I upgraded from a 950@4ghz to 4770k@4.6 on single GPU, and it's kinda a massive deal for a lot of games, don't make it out to be nothing when you have twice as much graphical power so you're demanding almost twice as high FPS from the CPU

I could name quite a lot of modern games (just ones i had interest in) that hit CPU limits on one high end GPU and haswell, but for two gpu's and a CPU a large gap behind in singlethreaded performance, it's easier

Don't take my word for it, grab a second screen and throw up task manager, msi afterburner, watch individual CPU cores and GPU usage in various games and situations

I would say that Borderlands 2 fits under the "horrendously optimized" umbrella. With PhysX turned on high, that game is an absolute pig.

My point was that while it's possible it may be a bottleneck, it's not enough of a legitimate problem to require upgrading (seeing as how the games that are bottlenecked by the 970 are likely to be bottlenecked by newer i7s as well). It would be better to keep the system for another year or two, and upgrade the entire thing as a whole.
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post #8 of 12
Yea i agree, it's mostly a few problem games that stand out. If you're playing one or want to play one, it really sucks. 6 core 970 will be fine for most stuff, i just don't doubt that it'll lose to haswell on quite a handful of games if you're targetting high fps over max graphics and supersampling. A surprising amount of games are not well optimized, though..
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post #9 of 12
Clock it up to 4.5Ghz and you shouldnt have a problem. You shouldnt be having a problem at 4Ghz
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post #10 of 12
Thread Starter 
Appreciate the replies guys, thanks. I'm guessing the 7950 prices will drop quite a bit once the new line of amd comes out, so I was thinking of grabbing another 7950 then.
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CPUMotherboardGraphicsRAM
i7 970 asus p6x58-e pro EVGA 780 Classified g.skill ripjaws x 12gb 1600mhz 
Hard DriveCoolingOSMonitor
2x 128gb ssd corsair h60 push/pull cpu win 7 64bit sceptre 27'' 1080p 
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razer tournament edition silent pro m 850w nzxt source 210 white razer deathadder 
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Rig
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CPUMotherboardGraphicsRAM
i7 970 asus p6x58-e pro EVGA 780 Classified g.skill ripjaws x 12gb 1600mhz 
Hard DriveCoolingOSMonitor
2x 128gb ssd corsair h60 push/pull cpu win 7 64bit sceptre 27'' 1080p 
KeyboardPowerCaseMouse
razer tournament edition silent pro m 850w nzxt source 210 white razer deathadder 
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plantronics 780 
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