AMD FX-8350 only uses around 30% of its capacity when under heavy load

[Franzzz]

Ive had this problem for some time now. When I play new games with heavy physics like ARK: Survival Evolved and Mortal Online (both made with Unreal Engine) my fps sometimes drops dramatically until CPU is using 100% like normally.
3DMark´s physics score is also horrible.

I ran stability test and this is what happens:

During the test, I didnt see any changes in cpu temperature (40-45C).

PC:
AMD FX-8350 @4.2 GHz
Asus GTX 760 DirectCU II
Asus M5A78L LE
SilverStone 500W
Kingston HyperX 16Gb

Any ideas what could be the problem here? Thank you in forward

 

[Proofy]

If the temperatures are normal, it's most likely the motherboard voltage regulators are throttling because of heat. Adding a fan over them should help.

 

[immortalpenguin9]

get a 990fx mobo...I highly recommend the gigabyte udh3...had it and loved it

 

[Franzzz]

get a 990fx mobo...I highly recommend the gigabyte udh3...had it and loved it

Yea I have been considering to buy a new one anyways so hopefully that will fix it.

 

[Franzzz]

I guess this would do it. Price seems to be reasonable.
http://www.gigabyte.com/products/product-page.aspx?pid=3894#ov

 

[Johan Kryger Haglert]

It doesn't measure that often I guess. Maybe Afterburner would give a better view. See per core.

Also use AMD catalyst / BIOS to turn of Sleep 'n' quiet while playing and see what happen maybe?

 

[Cryio]

It's the motherboard. It's not meant to be used with overclocked Vishera CPUs or Vishera CPUs at all really. Indicated would be a 990X or 990FX AM3+ motherboards.

 

[Franzzz]

I put clocks to default and turbo core off and it helped a little. CPU was stable couple seconds longer... Even tried to "downclock" it to 3.5GHz and now the drops occur maybe once in a minute but Im not going under that, lol.

Im buying a new one ASAP. Ill update this thread when it arrives.

 

[synphul]

The current motherboard (Asus M5A78L LE) is one of the weakest am3+ motherboards out there. It's only got 3+1 power phases. 4+1 would be questionable with an fx 8350. Even a 970a ud3 (gigabyte) has 8+2 phases and would be much more suitable. More stable am3+ motherboards have heatsinks on the vrm, that particular one (and other cheap boards) do not. It should help fix the problem, by the looks of the graph it's obviously throttling at even intervals indicating it's hitting a threshold and since the cpu itself doesn't appear to be overheating the vrms would be the next most likely culprit.

 

[immortalpenguin9]

the board you listed is the exact one I had and held my 8150 at 4.8ghz stable with no throttling whatsoever. There are boards out there with more features but obviously at a higher price. For what I wanted it was a work horse for 2 years and now its in my bros pc still going strong at 4.8ghz

 

[Franzzz]

Okay my Asus Sabertooth 990FX R2.0 arrived today and that fixed it. I guess I can mark this as solved
Thank you for help.