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Have been having some issues for a while now, with a (what I consider to be) top of the line PC. Specs and issues listed on system builder.

https://pcpartpicker.com/user/ephili/saved/wG4zMp

Its been a trend for high GPU usage and low CPU usage and yet low frames. My buddy says CPU bottle neck. Then he suggests I get a weaker GPU to 'match my mid range cpu'. I think something else is going on. Changing graphics settings in games does not see much if any change.

 

 
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Issue 1) Have had many issues with BIOS being slow to POST and get to windows login/desktop screen. Currently an issue. Always gets stuck on VGA light and takes forever. Sometimes I have to reboot several times (forced) to get it to boot. Gets perma stuck booting sometimes never gets to windows. Newest BIOS (F3).

Issue 2) Low FPS in many games, and now that I have a 100hz 3440x1440p Ultra Wide Monitor, have had a lot of issues. CSGO is only one that runs at or over 100hz. Pubg is 53-62fps regardless of GPU settings (eg: low, or ultra). GPU load on PUBG was 98-100% while CPU was like 25-(maby to 40)% on all cores. I should have higher frames than this. FarCry5 on Ultra i get 50-65 range average was 63 on the in game benchmark. Orisis: new dawn I got 20fps consistent on all settings except Toaster (yes, its an Alpha build) where I got 30-45fps. I have tired with stock 2133Hz and XMP 3200hz.

Issue 3) Tearing, stuttering, micro stuttering. Vsync fixes tearing but adds lag which is bad, when the voice for a NPC on cut scene does not match lips. Yes monitor I got is freesync, and GPU is nvidia (Gsync) but I figured it could push 100Hz on its own without effort.

EDIT: After market CPU cooler returned, the capacitors were in the way of the bracket. They need new bracket for x470 or specifically Gigabytes version of MoBo. Used stock cooler.

And bought another Corsair RGB Strip Extension kit for 40$.

I am now 'one click' overclocked to 'extreme' which is 3.9Hz from Gigabyte software.

 

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100% load on GPU and 20% on CPU would suggest your GPU is working at it's max. Not that your CPU is bottlenecking it. A bottleneck would show a much lower GPU load than CPU load. A 2700x shouynot bottleneck a 1070 Ti.

 

Your framerates on 1440p doesn't seem that off to me considering you have a 1070 Ti.  But the fact that changing settings doesn't do anything, seems weird.

 

Try this:

-Set power options in windows to performance.

-Reinstall nvidia drivers after using DDU

-Make sure your display is set to 100hz in Nvidia control panel and Vsync is off.

I like zip-tying Intel stock coolers on graphics cards.

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