Question Reduce TDP Cpu Phenom II X6 1055T

[Riky1993]

Hi everyone, I've taken an old bad mounted pc from a friend, with a mb M5A78L-M LX3 and a Phenom II X6 1055T (125 watt), which is not compatible. Obiouvsly, when I power on it says "This CPU is anot supported by this model", if I press F1 Windows 7 starts and works correctly. I'm trying to reduce TDP from bios settings, and I tried this thing without success:
- decreasing by -0.2 the option CPU Over Voltage
- disabling one core
- installed throttlestop, but it's not compatible with amd and it doesn't start

Is there any other thing that I can do to reduce TDP from 125w to 95w max? Thank you.

https://imgur.com/a/7fo47lw

 

[zinkles]

i don't think you can decrease it by that much, but undervolting (as you mentioned you decreased it by 0.2v) should reduce it by a little bit.

you can decrease the clock speed of it whole undervolting it. this will lower the performance, but should accomplish what you want (or close to it). you should lower it by a lot to achieve close to your goal of 95w.

if the system becomes unstable while doing so, you should lower the clock speed a little more. (lowering the clock speed a little more than the lowered voltage, i.e. -150mhz for every 0.1v would do. even further should be ok, but that's what I recommend)

note: run a small stress test for the CPU to test the stability between each undervolt+underclock.

 

[Riky1993]

i don't think you can decrease it by that much, but undervolting (as you mentioned you decreased it by 0.2v) should reduce it by a little bit.

you can decrease the clock speed of it whole undervolting it. this will lower the performance, but should accomplish what you want (or close to it). you should lower it by a lot to achieve close to your goal of 95w.

if the system becomes unstable while doing so, you should lower the clock speed a little more. (lowering the clock speed a little more than the lowered voltage, i.e. -150mhz for every 0.1v would do. even further should be ok, but that's what I recommend)

note: run a small stress test for the CPU to test the stability between each undervolt+underclock.

Thank you for reply. The option you’re saying is CPU/NB Frequency?

 

[zinkles]

it's mainly referred to as clock speed. different BIOSes might call it different things, might want to look yours up.

as I said, reduce the clock speed, while reducing the voltage. do so, following the instructions I gave above.

 

[Unolocogringo]

You could disable 2 cores and turn it into a 960t or 4 core processor with extra cache.
That would drop you to the 95w limit and then see how she overclocks with lowered voltage.
My old Phenom2 x6 hit 166-170 watts when overclocked to 3.6 all core.
Which your motherboard would die trying.
"Most" games like a faster single core than lots of cores.
Most games, but there are exceptions.

 

[kanewolf]

Hi everyone, I've taken an old bad mounted pc from a friend, with a mb M5A78L-M LX3 and a Phenom II X6 1055T (125 watt), which is not compatible. Obiouvsly, when I power on it says "This CPU is anot supported by this model", if I press F1 Windows 7 starts and works correctly. I'm trying to reduce TDP from bios settings, and I tried this thing without success:
- decreasing by -0.2 the option CPU Over Voltage
- disabling one core
- installed throttlestop, but it's not compatible with amd and it doesn't start

Is there any other thing that I can do to reduce TDP from 125w to 95w max? Thank you.

https://imgur.com/a/7fo47lw

Your warning message may be because the hardware ID in the CPU is NOT in the BIOS allowable CPUs. Changing the actual power usage won't fix that.

 

[Riky1993]

Your warning message may be because the hardware ID in the CPU is NOT in the BIOS allowable CPUs. Changing the actual power usage won't fix that.

Is there a way to remove that message? Or maybe something to run windows without always pressing F1?

 

[kanewolf]

Is there a way to remove that message? Or maybe something to run windows without always pressing F1?

You would have to MANUALLY edit a BIOS that has the hardware ID of this CPU in the proper places. It is a BIOS function, not a Windows function.

 

[Riky1993]

it's mainly referred to as clock speed. different BIOSes might call it different things, might want to look yours up.

as I said, reduce the clock speed, while reducing the voltage. do so, following the instructions I gave above.

I need some other help because I don't know if my input is working or not. As you can see in the photo, I insert -0.1, but after I press enter it returns to [Auto], do you think something as changed?

https://imgur.com/a/kAeoRgR

There are other settings, I've tried to disable 5th and 6th core and reduced clock calibration -8% for all cores. VCORE Voltage can't be changed.

https://imgur.com/a/7Hway80

But if I run HWMonitor and CPUz I can't see any differences, probably I am doing something wrong:

https://imgur.com/a/jv66QQJ

 

[Unolocogringo]

Are you changing one value at a time and then pressing F10 (save and exit)?. then selecting yes on the next screen.
System will then reboot with saved settings.

Start again
Reset bios to default settings. F5 /yes enter then F10 . let system reboot.
Asus Auto overclocking core boost etc..... uses way too much voltage so turn them all off.
Set ram speed/timings and voltages.
Set CPU overclocking to manual. F10 reboot.
Now you should be able to control voltages /multiplier and core settings.
BE safe when changing bios settings and be ready to Clear CMOS/reset bios many times in finding the sweet spot for your processor.
One setting at a time so that if it crashes , you know what caused it.

 

[Alexey260]

Is there any other thing that I can do to reduce TDP from 125w to 95w max?

You can reduce real TDP by disabling cores and reducing frequencies, but even if you disable all cores except one and lock its frequency to 800 MHz, the cpu spec read by bios will still say "125W". Only somehow messing with bios like kanewolf said earlier, but that's very unlikely to do. If MB vendor isn't supporting 125W CPUs you may then just occasionally burn the VRMs and break your mobo. Find a 95W cpu if you want.

 

[Riky1993]

You can reduce real TDP by disabling cores and reducing frequencies, but even if you disable all cores except one and lock its frequency to 800 MHz, the cpu spec read by bios will still say "125W". Only somehow messing with bios like kanewolf said earlier, but that's very unlikely to do. If MB vendor isn't supporting 125W CPUs you may then just occasionally burn the VRMs and break your mobo. Find a 95W cpu if you want.

ok I understand. It's better to buy another cpu instead of reducing tdp. Thanks to all for the support!