lenovo e535 APU tempature

[m4a2t0t]

Does this board have an external sensor for measuring APU temps?

MOBO - LA-8124P

Issue:
The thermal sensor for the APU is reporting at 85C idle with an A6 APU. I replaced it with a A10 and it reports +90C at idle. The heatsink is cool so I know its not overheating.

The problem is that the system is throttling the APU to 900MHz because of the temps.

I thought the sensor would be internal to the chip. If the sensor was bad then replacing the chip should have fixed it.

I have upgraded to the latest BIOS without any change.

Thanks for any help

[Djosla]

Re: lenovo e535 APU tempature

Check out the board schematic page 38.there is a thermal sensor near apu...
Also check capacitors on remote lines of U2402...

[m4a2t0t]

Re: lenovo e535 APU tempature

Only Alibaba has the part and I can't find any dead boards for parts.

Anyone have a dead board with this sensor on it??

F75303M_MSOP10

Labeled on top of IC
303M
GHEA5

[atsio]

Re: lenovo e535 APU tempature

The specific IC reports temp of ddr and vram to ec. I do not think this ic is your problem. There isn't an external sensor for the apu on the board. Probably your problem is software related. Check with a fresh install without drivers and updates.

[m4a2t0t]

Re: lenovo e535 APU tempature

First thing I did was install windows on a different drive. I thought it was a Windows 10 issue so I installed 7.

Installed a new mobo

APU reports 85-105C

APU runs @ full speed

The new board has BIOS 2.08. I guess I can try to reflash the old board or downgrade the BIOS if possible.

[passete]

Re: lenovo e535 APU tempature

So, with new board the problem remains ?
New mobo + Apu = 85-105°C

[m4a2t0t]

Re: lenovo e535 APU tempature

Still temp issue but the APU is not stuck at 900MHz anymore.

the temp really isn't an issue because I know it not overheating. I thought the high temps were the cause of the APU being throttled to 900MHz

[Agent24]

Re: lenovo e535 APU tempature

The thermal sensor for the APU is reporting at 85C idle with an A6 APU. I replaced it with a A10 and it reports +90C at idle. The heatsink is cool so I know its not overheating.

Is the the thermal interface material OK? You're not putting too little or too much?

Because if the temperature is reported as high and the heatsink is cold, it could be that the heat is not getting from the CPU to the heatsink.

[quic307]

Re: lenovo e535 APU tempature

Does anyone have kbc and bios for this motherboard?