XTU has not changed much other than knobs for the new platform settings and the addition of benchmark submission to hwbot.org.
The Benchmark runs Prime95 and produces a score, the score can then be submitted to hwbot.org along with all the settings.
The benefit is you can see the settings others are running but it gives you the ability to download those settings to try on your machine.
Testing these settings on your machine could destroy your machine, some unsuspecting novice looks at my insane memory setting and figures it is safe to try on air... Poof. You just applied 2v to your ram and voltages meant for sub zero to your CPU and IMC.
Under the Cores tab you can adjust pretty much all the core released stuff except options found core config in BIOS.
You cannot change Burst and Sustained power limits, you cannot disable cores.
Benchmarking: HWBOT Submit
Once you run the benchmark, the submit button will become active. System vitals can be monitored on this page while benchmark runs.
System Settings from hwbot
Under this tab is where you can download the XTU profile.
Minimal knobs available for adjusting the graphics core speed and voltages.
This worked fine even though I did not push the IGP while sub zero.
Processor Integrated VR Faults: disable for OC
Processor Integrated VR Efficiency: disable for OC
Stress testing from XTU is very thorough, burn in testing at its best. These work as intended and you can monitor system vitals on the same screen.
Systems info from hwbot
Submission page from hwbot