Hello, sorry you're having trouble. You're only seeing 3.4 GHz because the 2700 will boost up to 4.1 GHz but only on a couple threads at a time. If you download and run HWMonitor and run something that puts a load on your CPU you should see at least one or more of your cores turbo to 4.1 or close to that. And remember; AMD claims "Boost speeds UP TO 4.1 GHz". They don't guarantee it because the performance of their CPU's depends a lot upon the capabilities of the rest of your hardware like your motherboard, PSU and of course memory. So if you're motherboard doesn't have the VRM's to push the CPU you're not going to see those speeds. And no matter what you won't see them on all cores unless you set an all core overclock. For instance; my gaming rig is running an MSI Tomahawk B450 (which I personally love) with a R7 2700 and 16 GB of Vengeance DDR4 3200 MHz. If I leave everything in the bios at default my CPU runs the same as yours. 3.2 base and 3.4-3.6 in boost. That's viewing the performance through Task manager.. Now if I open HWMonitor I can see that the processor is actually boosting to 4.1 on multiple cores/threads and in some cases further. Now if I leave everything stock and run Cinebench R15 I will get a score of around 1600. And in CPUz's benchmark Multi-thread scores will hit about 4200 and single core scores will hit 390-400; which is much less than the single thread performance of my R5 2600. If I set an all core overclock of 4.1 GHz on the R7 those numbers increase significantly; 5100 in multi-thread and 472 in single thread testing. Which is pretty good.
I am having an issue of my own right now that I can't quite figure out. Whenever I lower my core voltage from 'Auto' which is way too high at about 1.35 volts @ 3.4 GHz; my cpu runs at 4.1 GHz even though the base is still aet to 3.2 GHz and if I put a load on it like cinebench my clocks decrease to 2.4 GHz which results in a horrible score of 1050 ish.. Now this has only started since I switched out my R5 2600 for the R7 2700. If I put everything back on auto my clocks go back to 3.2 and 4.1 respectively but the voltage is so high that it's causing my CPU to run too hot. When I was running my R5 I could lower the core voltage to 1.28 volts, reboot and run my benchmarks and the cpu speeds are normal... So why am I having an issue with my 2700? Since when does decreasing core voltage result in higher clock speeds??? And again, it only happens with the R7. I'm looking into that now. Hopefully I will get this CPU running as well as my R5