need fast answer please

a bottleneck is a constraint, so in the case of a CPU bottleneck the CPU constrains the GPU so the CPU will be at 100% and will prevent the GPU from running at above a certain percentage. In a GPU bottleneck the GPU will be running at 100% and won't keep up with everything that the CPU can send, the CPU will be sitting at a lower percentage.

However the disk can also be a bottleneck (rare), the memory can be a bottleneck (very rare), the network/server can be a bottlenck(quite common Dayz mod for instance).

The problem with bottlenecks is two fold,
1. people are far too concerned about them, they will happen, they are a part of life, there is always a bottleneck. providing you are not incredibly unbalanced there is no problem. in your case incredibly unbalanced would be a heavily OC'd 980, or SLI 970 imo.
2. bottlenecks move from game to game, some games are more CPU intensive some are more GPU intensive so you can never balance a system perfectly, it's pointless trying.

Additionally if you buy to precisely balance with every upgrade then every upgrade will CPU + GPU. If you are perfectly balanced then your CPU and GPU will be working at 100%, if you then upgrade just the GPU (quite common) then the CPU will be at 100% and will constrain the GPU at somewhere close to the old limit, making the upgrade pointless, hence you need to upgrade both. So building to precisely eliminate bottlenecks is pointless and impossible.
 

VaXo Musxelishvili

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Jan 2, 2015
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will my i3-2120 bottleneck gtx 970 zotacedition?
 

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