Can boot when CPU is first detected, can't afterwords.

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Jaydix

Honorable
Aug 31, 2013
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I'm currently on the computer with the new CPU at the moment, but let me explain what's going on.

Upgraded my Phenom II 965 to a Piledriver FX9370.

I can boot up the first time (It says New CPU detected, I load setup defaults and continue)

However, after I turn off the power. I can't boot, I get no post, no power to the keyboard or nothing, And I have to pop the cpu out and put it back in to be "redetected", since that's the only way I can boot, after I load those setup defaults.

I can't figure out what's wrong, It doesn't seem like a power issue, because I can start again after the motherboard detects a new CPU.

I just can't turn the power off or I can't boot.

There's also something strange i've noticed, the CPU is meant to be at 4.4ghz stock, however, CPU-Z measures it at 3.8ghz.

Here's my system specs

Motherboard: Asus M5A78L-M/USB3
Processor: AMD Piledriver FX-8 9370 BE 4.40GHz
CPU Cooler: Corsair H80
Graphics Card: Sapphire 7950
RAM: 8GB Kingston
SSD: 120 OC-Z Agility SSD
750w Corsair PSU

Thanks for any help, would be greatly appreciated.
 
Solution
Shaun o
That sort of tells me your bios of the motherboard needs an update to support the new cpu.

I would check to see what revision of bios firmware is currently running on the motherboard you have.

From there I would go to the Asus website and the support page for the model number of the board.
There is always a bios update list there and should also be a cpu support list based on the revision of bios number you have.

I think you will find you may need to flash the board with a higher bios revision number. that should solve it not being detected.

You should also be aware of the maximum wattage that the board can supply to a cpu.
If the cpu requires more wattage than the cpu socket can provide, then the result is often a fail to boot, or...
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Shaun o

Shaun o

Illustrious
Oct 7, 2007
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That sort of tells me your bios of the motherboard needs an update to support the new cpu.

I would check to see what revision of bios firmware is currently running on the motherboard you have.

From there I would go to the Asus website and the support page for the model number of the board.
There is always a bios update list there and should also be a cpu support list based on the revision of bios number you have.

I think you will find you may need to flash the board with a higher bios revision number. that should solve it not being detected.

You should also be aware of the maximum wattage that the board can supply to a cpu.
If the cpu requires more wattage than the cpu socket can provide, then the result is often a fail to boot, or problems after the first bios setup of the new cpu, and a restart after saving the settings in the bios.
 
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