Will my CPU Bottleneck this System? "i7-3770k OC'ed plus SLI GTX 980ti's"

MagusALL

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May 24, 2013
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Like the post says. Rig also equipped with; 16Gb G. Skill 1600 @ XMP, 120Gb OS SSD, 240Gb Gaming SSD, four HDD's in RAID10. I want to upgrade my monitor to either 3440 x 1440 or straight UHD/4K with G-Sync so I wanted a GPU setup that is capable of playing games with maximum settings including textures but not necessarily AA at all. With a 4K, G-Sync display I don't believe I would notice any issues with screen tearing or stutter especially since G-Sync has improved so much over the past couple years.

I would like to keep the rig mostly the same, save swapping out two GTX 780's with 3Gb of VRAM for two GTX 980ti's with 6Gb of VRAM both in SLI. I don't really want to have to change CPU's because then I would of course have to change my motherboard and possibly even RAM to DDR4. I say this because if I must upgrade my CPU to accommodate the GPU performance output to the monitor I will likely go "all out" with one of the Intel 6 core/12 thread CPU's like the i7-5820 or i7-5930K. Of course that will necessitate an entire platform change and a lot more money so I'm hoping my 4 core/8 thread CPU, being the i7-3770K overclocked to 4.2Ghz will not bottleneck the SLI setup I'm hoping to achieve.

So I guess a "more-to-the-point" question is what CPU will allow a gamer to achieve 60fps-120fps/144hz on a 4K monitor either with G-Sync or on a non-G-Sync 3440x1440 monitor at 60fps/120fps considering the GPU setup is SLI GTX 980ti's with 6Gb of VRAM. Why I keep mentioning the VRAM is I think 3Gb won't be enough for those respective resolutions. Thanks for all the input and, fingers crossed, I won't need to change the entire platform to get 60fps at 4K G-Sync or 3440x1440. I have had mixed answers to this question in the past but mostly, ironically, by AMD fanboys. AMD fanboys...hehe.

BTW and FYI my motherboard is an MSI Z77A-GD55 and the two GPU's will be MSI 980ti GAMING 6Gb's, being powered through two Corsair TX750's linked together (Add2PSU), one for the system included one GPU, the other for only the other GPU. My CPU is air-cooled but I'm considering h2o cooling the entire rig one day. Also have a Pioneer BD-RW all squeezed into a Corsair 200R case with three fans (one CPU, two System).

Thanks for all the input. Thanks for reading my long post.
 
Solution
If your games are graphics limited, you will get a nice boost.
Fast action shooters are in that category.

If your games are cpu limited, not so much. Strategy, sims, and mmo types are in that category.

Here are a few things to test:
a) Run YOUR games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.

b) Limit your cpu, either by reducing the OC, or, in windows power management, limit the maximum cpu% to something like 70%.
Go to control panel/power options/change plan settings/change advanced power settings/processor power management/maximum processor state/
This...
If your games are graphics limited, you will get a nice boost.
Fast action shooters are in that category.

If your games are cpu limited, not so much. Strategy, sims, and mmo types are in that category.

Here are a few things to test:
a) Run YOUR games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.

b) Limit your cpu, either by reducing the OC, or, in windows power management, limit the maximum cpu% to something like 70%.
Go to control panel/power options/change plan settings/change advanced power settings/processor power management/maximum processor state/
This will simulate what a lack of cpu power will do.
Conversely what a 30% improvement in core speed might do.
 
Solution