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4570 Turbo Boost Not Working Properly? only up to 3.4GHz on 100% load - Page 2

post #11 of 14
CPU-Z and Windows both report the "stock" base clock speed of the processor as a literal string from the CPU itself. Even if you lock that thing at 4.2 GHz, it's going to show 3.20 GHz in the CPUID string.

The actual clock speed is displayed in CPU-Z at the lower left, and other tools such as HWiNFO64 will show you the actual. individual core speeds.


Greg
post #12 of 14
Here's what the frequencies should look like for an i5-4570 under different conditions:

Idle: 0.8 GHz (800 MHz)
Default w/o turbo: 3.2 GHz
Turbo w/ 1 core loaded: 3.6 GHz
Turbo w/ 2 cores loaded: 3.5 GHz
Turbo w/ 3-4 cores loaded: 3.4 GHz
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post #13 of 14
Your turbo boost is working correctly. The thing with turbo is that is still has to stay within a certain TDP threshold at any load or frequency. It seems that it would be exceeding the rated 84W TDP with all cores loaded at the higher turbo speeds.
Edited by metal_gunjee - 8/11/13 at 4:57pm
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post #14 of 14
Thread Starter 
Thanks everyone for explaining it very well. +rep to you guys thumb.gif
Hope this thread helps others too in the future.
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