Why is my PC Performing Below Expectations?

Solution
Did you do a fresh install of Windows after upgrading?

Did you enable the XMP profile for your RAM in the BIOS, and confirm it's actually running at its rated speed of 3200 MHz?
The results also indicated that something may have been using CPU power in the background, reducing what was available for benchmarking. Before you benchmark, close any/all possible programs.

" Sub-optimal background CPU (20%). High background CPU reduces benchmark accuracy. Find active processes with Windows task manager (CTRL+SHIFT+ESC)."
 
Don't worry. Userbenchmark is only a syntetic test that helps you.
Simply tells you that between 100 pc with the same configuration as yours would be in the post 33. It does not tell you what deficit you have compared to the average. Your rig is fantastic.

fristly, as says smashjohn, the test is with a 20% background cpu. Normal is about 2%-4%.

Memory is the only thing that must be tuned. Your memory can speed at 3200 and it run at 2133, as the reportcsays. This is because you don't have enabled XMP at BIOS. You can see at userbenchmark memory report that the graphic shows two montains. The first, the users without XMP enables (where your memory drops) and the other with XMP enabled.

About the processor you can see also the graphic with two mountains. Your procesor I7-8700K can be O.C. The users that don't OC drops in first mountain and the users that O.C. drops at second mountain. you can check the windows energy options and choose the performance optcion vs balanced one. And repeat the test at idle.

About the GPU, the mountain is very narrow and the real differences are very little. I think some GPU are with a little OC.

About the SSD some user can have enabled some samsung features (rapit ...) that improve the benchmark but with no effect in real life. Don't worry about it.

Fix the memory XMP and (only if you want and know) put a little OC and enjoy your pc.
 
Nothings wrong with the results at all , as antonio.parrot mentioned you are up against people with the same component list but many will be heavily overclocked.

200mhz core , 150mhz mem clock overclocks on a lot of 1070's benchesd on there will push your stock clocked model down in the rankings a fair way.

Not something I'd worry about at all.
 
Ok thanks guys. I had no particular FPS issues in any games I was just wondering if there was anything wrong. I switched to XMP mode and swapped to performance mode. The possibility that I'm going against OC'd systems sounds about right. One last question though, will leaving XMP mode on affect my pc at all?
 
Enabling XMP sets your RAM to run at its rated speed and timings, i.e. 3200 MHz CL16. There's no reason to not have it enabled, and if you don't you're just wasting the potential of the high speed kit you bought. If you can damage your PC by enabling it, then no.