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CPU-z shows different numbers than BIOS? Am i getting bottle-necked?

So i'm trying to figure out why BIOS says im running at 4.00ghz CPU and 1600mhz ram. but CPU-Z says im running 1399.2Mhz CPU and 800 Mhz ram. Windows task manager shows CPU at 1.36Ghz and ram at 800 Mhz..

Build :
CPU: AMD FX-8350 Vishera
GPU: gtx 960 2gig
Mobo: MSI 970 gaming mobo
Ram: 8 gigs ddr3 1600mhz
PSU: corsair 750w

http://imgur.com/JRWwfsG
http://imgur.com/nluHeuQ

Notes: when i run prime95 my CPU usage wont go above 35%. When i play games my CPU and GPU usage is normally low, yet im not getting the fps that people with similar builds are getting.

Other questions: is my mobo bottle necking my components? Or does something need added like more RAM. in terms of why im getting low FPS.

Troubleshooting so far:
- Updated BIOS
- Turned off AMD cool n' quiet functions
- Turned on high performance mode in power settings.
- Checked BIOS for other power saving features and disabled them.
- Tried to manually set my CPU speed to a 4.2ghz yet it still wont go over the speed 1399mhz when i check CPU-Z.

These are all new parts and its getting rather frustrating to not have the results i believe i should be getting out of the system. However if im wrong in someway I would appreciate some enlightenment. Thanks in advance for any help. I'll try to keep this updated.
10 answers Last reply Best Answer
More about cpu shows numbers bios bottle necked
  1. First 800 = 1600 for the ram as ddr3 the D's stand for double data (rate)

    Secondly can we get a screenshot of cpu z WHILE prime is running all computers slow down to save energy when nothing is in use. Why do you want it running full speed at idle,
  2. Supahos said:
    First 800 = 1600 for the ram as ddr3 the D's stand for double data (rate)

    Secondly can we get a screenshot of cpu z WHILE prime is running all computers slow down to save energy when nothing is in use. Why do you want it running full speed at idle,


    http://imgur.com/a/S9xPJ i took this after prime95 had been running for a few minuets. I ran it on the blend mode that says " a bit of everything" or something along those lines.
  3. That leaves the question of what are your temps first? Secondly what motherboard and power supply/gpu do you have?
  4. Stupid question, have you edited windows power plan settings?
    Under advanced you can limit the maximum CPU state - that could be causing this.

    I would also completely reset the bios back to stock, without any overclocking and see what happens then.
  5. Best answer
    While that is a completely garbage power supply and not the board I'd use with that cpu neither are bad enough in that rig to cause that. I THINK there is a slow mode (or something to that effect) switch on that motherboard. Make sure it's not on
  6. Faux_Grey said:
    Stupid question, have you edited windows power plan settings?
    Under advanced you can limit the maximum CPU state - that could be causing this.

    I would also completely reset the bios back to stock, without any overclocking and see what happens then.


    did a double check just incase. But yeah the min and max CPU power is set to 100% and running in high performance mode.
  7. It was the slow mode switch. can't believe i over looked that. thanks for point. All is running as expected now!
  8. Mack_1 said:
    Faux_Grey said:
    Stupid question, have you edited windows power plan settings?
    Under advanced you can limit the maximum CPU state - that could be causing this.

    I would also completely reset the bios back to stock, without any overclocking and see what happens then.


    did a double check just incase. But yeah the min and max CPU power is set to 100% and running in high performance mode.


    Would you be able to say when the problem first started?
    Maybe when you were changing something?

    Also a previous poster suggested a slow mode switch on the board, could you check for that?

    Edit: derp. Glad you fixed it.
  9. Glad it was a simple fix, why the heck slow mode exists is beyond me but good you're up and runnung
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