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A silly question about CPU.

thedragon0000
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My friend, she has a PC with i7 4790S 3.2GHz-4.0GHz (turbo boost). But when she was rendering her video I notice that CPU was at 99% but the clock speed was only at 3.55GHz max and it never went higher than that. Can you guys explain this for me please, i thought 4.0GHz is the maximum clock speed when running some heavy work load.

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The 4.0GHz boost will kick in only when max 2 cores are working. When all 4 cores at at 100% there will be a lower boost (seems like 3.5 in your case).

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The 4.0GHz boost will kick in only when max 2 cores are working. When all 4 cores at at 100% there will be a lower boost (seems like 3.5 in your case).

If all 4 cores speed up to 4.0GHz, will it improve performance while gaming and reduce rendering time?

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If all 4 cores speed up to 4.0GHz, will it improve performance while gaming and reduce rendering time?

yes but you would have to OC the cpu

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Alot of motherboards have an option that allows turbo frequency (4.0GHz) on all cores, I wouldn't even call it overclocking, do you know what motherboard your friend has?

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4ghz is for 1 core, the more core it has enabled, the lower the turbo boost across all cores.

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