Need help

[DanVonTrap]

Today for the first time i installed a processor - AMD Piledriver FX-8 Eight Core 8350 Black Edition 4.00GHz (Socket AM3+) Processor.

And everything thus far has gone smoothly.

The only issue i am having is that my core speed is clocking at 2.81 GHz

How do i change this to what it should be which is 4.00 GHz

Not sure if this is of any use but this is my motherboard model GA-78LMT-S2P

 

[Smoogels]

Is this in idle in Windows? Both Intel and AMD processors clock down when the full speed is not required. When a higher clock speed is required it will automatically increase.

To permanently run at full speed you can enable the "high performance" power plan in the Windows control panel to make it run at 4GHz. It's best to keep the power options at balanced, though.

 

[melvis]

most motherboard bios/uefi buses are clocked at the lowest setting by default, (1066mhz i think for a piledriver), you probably want to increase that to 1333 or 1600 so the multiplier takes cpu clock speed to its correct 4ghz

 

[Avenged7Fold]

Like Smoogels said, CPU's are usually down clocked when they are idle to save heat and power. You can turn this off in your BIOs

Wouldn't be surprised if your VRMs are throttling the CPU. After looking at your boards specs, i suspect that the VRMs are overheating under any load and are automatically lowering your multiplier.

Run prime95.

Is your core clock at any time the stock speed (before/during prime)?
Are your VRMs hot after running it?
What happens after running prime?


Your motherboard only has 4+1 phasing and was not designed for fx chips. Though it is compatible with AM3+, it was not designed to handle the amount of power the 6 core and 8 core FX chips can draw, even at stock. I have seen a few old posts about people getting throttling on their 6 core phenoms when trying to up the voltage. The VRMs have no heatsink and tend to overheat easily when using a high power chip, it is likely they are lowering the clock and vcore to reduce the power draw and keep them in safe temperature level.

If this is the case, usually ways to fix it, is to cool the VRMs down to acceptable levels so that it can operate at stock voltage. For this motherboard, it is wishful thinking, there is no heatsink on the VRMs and due to the large power draw of 8350, a fan here and there would be a vain effort. If you find out it is the VRMs, get a board like the Asus Evo or Gigabytes 990fx UD3.

 

[Hagar]

If you find out it is the VRMs, get a board like the Asus Evo or Gigabytes 990fx UD3.

Agreed,

The 8350 should default to 4GHz when installed, the bus clock is 200MHz.

2.81GHz sounds like a power issue as the cool and quiet would resolve to 800MHz at lowest and multiples of 800Mhz up to the default frequency.

It probably is the board, it may be a weak PSU, what do you have? Any branded quality PSU of 450 - 500W or above should do.

List your components.

andy.

 

[DanVonTrap]

Thankyou all for your feedback. The hole down clock thing is not the case. ( I did however change it to high performance.

Idle it sat at about 1570 MHZ and when running multiple programs including games it went to about 2940 MHZ. I got these figures from CPU-Z.

I then went into easytune 6 and proceeded to the tuner tab and upped the FSB but if i went past 210 MHZ it reset the pc.

I am in the process of purchasing a water cooling system for the cpu just to eliminate any issue with that, if it proceeds to not perform at what it should be i will then look into another motherboard.

Anymore feedback is welcome.