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Crysis 3 cpu bottleneck?

Last response: in Video Games
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Sounds like it, that is way too low for a Radeon 7870.

You should check the CPU usage during gaming, HWINFO64 is a great tool to do so. If it's at a constant 100% while gaming, then you got yourself a bottleneck.

You could also by using a rivatuner server show usage, clocks, memory used - Everything in your PC - On screen screen while gaming.

This guide will help you through:

http://www.overclock.net/t/1229915/how-to-cpu-and-gpu-u...

if your trying to run at more than medium then thats your issue.
the game is a monster for requirements. to max it out you will need a titan, a 690, a 7990 or 2 680's
even 2 gtx 670's will struggle to get up to 60 fps.
crysis 3 does like high thread count cpu's but it doesnt care about speed as long as there over 2.6ghz.
so my guess is your running it at to high a setting that your card cant handle.
try running at medium with fxaa rather than smaa