The source of the leak, Kepler, has a good track record, making it more believable than others. But, from what I've read, SPEC has several tests and can stress the CPU in different ways, and given that he didn't specify if that 40% is on average across all tests or just in one specific test, we should take that number with a grain of salt.
Please excuse my bad English.
Former gaming PC: i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Current gaming PC: R5-7600, 32GB RAM 6000MT/s (CL30) and a RX 9060XT 16GB
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