if you want try this
http://www.numberworld.org/y-cruncher/
just read the instructions on how to run the tests and don't test a run that's over the memory on your board or it will run in swap and take forever to finish
and get the result
Computation Time: 83.863 seconds
Total Time: 93.112 seconds
CPU Utilization: 372.950 %
Multi-core Efficiency: 93.238 %
4 core cpu would be 400% [100% per core]
and watch your boost total i'll bet it gets to as close to that 3.4 as it can just monitor you temps as well
I like using hwinfo64 for this
my bad
Processor(s): Intel(R) Core(TM) i5-4670 CPU @ 3.40GHz
Logical Cores: 4
Physical Memory: 17,107,124,224 bytes ( 16.0 GiB )
CPU Frequency: 3,399,047,087 Hz
Program Version: 0.6.7 Build 9457 (Windows - x64 AVX2 ~ Airi)
Constant: Pi
Algorithm: Chudnovsky Formula
Decimal Digits: 500,000,000
Hexadecimal Digits: Disabled
Threading Mode: 4 threads
Computation Mode: Ram Only
Working Memory: 2,430,953,024 bytes ( 2.26 GiB )
Logical Disk Usage: 0 bytes ( 0 bytes )
Start Date: Wed Mar 23 17:55:45 2016
End Date: Wed Mar 23 17:57:11 2016
Computation Time: 77.068 seconds
Total Time: 85.872 seconds
CPU Utilization: 385.730 %
Multi-core Efficiency: 96.432 %