Phenom II 955 Multiplyer Jumping

[Frozennova]

My PPD while folding seemed a little off so I sat and watched cpu-z for ten minutes or so and noticed that it keeps dropping the multi down to [4x] every every now and again.

I downloaded Tmonitor from CPUID to monitor clock speeds across the 4 cores and it seems that my multi is sitting at [15.5x] or [15x] most of time time however drops to [9x] frequently and occasionly down tp [4x]

Specs
AMD Phenom II 955
Asus M4A785TD-V Evo
4 Gb Geil value 1333mhz
8800GT
OCZ 400w PSU

Overclock settings

HT Ref: 250
CPU Multi: 16x
Vcore 1.45v
Mem Divider: 3/8

CnQ & C1E Disabled

 

[EniGmA1981]

Sounds like intel's SpeedStep... I forget what it's called with AMD processors but it stops the cpu running flat out to reduce temp at idle

confused me before I realised what it was too

 

[welshdragon]

Could be 'Cool'n'Quiet' which drops the cpu down as the previous op stated when not in use. You access this in the bios. Which I note you've disabled.

As I found out it could be the 'power profiles' if using windows 7. Setting it to 'balanced' in win 7 does the same as 'coolnquiet'. Try changing the power profile to performance.

I disabled collnquiet in the bios and just change between balanced and performance depending on what im doing.

 

[Frozennova]

Changing power plans doesnt make any difference, after a bios update it seems to have stopped it drop to 4x but Tmon is still showing a drop in multo

 

[welshdragon]

Try it with stock settings?

 

[Frozennova]

Does the same at stock, and with a 250x16 and 200x20 overclock

 

[Bleek]

I disabled my cool and quiet as my Phenom II at 3.7GHz runs 25'c idle so never saw any need for it.

 

[Frozennova]

I fold so my system never actually idles, 100% load on the cpu and gpu permenantly

 

[Big.Wayne]

Hello frozennova

My PPD while folding seemed a little off so I sat and watched cpu-z for ten minutes or so and noticed that it keeps dropping the multi down to [4x] every every now and again.

I had similar issue back in march this year and made a post about it in the AMD® Athlon™ II Overclocking Thread

Processor is at full 100% load in the above image . . .

• Problem detailed in post #72
  
• Fix detailed in post #76

 

[Frozennova]

hmmm im not sures it due to the vrms getting hot as mine have heatsinks and have a fan intaking air over them.

The throttling to 4x seems go have gone and cpuz is showing as my 16x multi but tmon is showing 19-19.5x

 

[Orcvader]

Personally I would trust CPUZ more. What sort of cooling do you have on the 955?

 

[Frozennova]

Watercooled, maxes at around 53-55'c

 

[thingemajib]

well if the ht clock is 250mhz, then cool n quiet shouldnt be working anyways.
I dont suppose it could be one of the many asus conceptions slap onto each board that has a similar effect to cnq?

 

[Big.Wayne]

hmmm im not sures it due to the vrms getting hot as mine have heatsinks

The heatsink may not be attached very well or still just getting very hot . . . Have you put your finger on the VRM heatsink to see if they are scorching or? . . .

and have a fan intaking air over them.

What do you mean? . . . there is a fan blowing air down on them or just a case fan extracting air a few inches above? . . . there may not be enough airflow . . .

Watercooled, maxes at around 53-55'c

If the CPU is Watercooled and your not using any fan at all blowing down on the CPU area then I'm 99% certain the problem is the PWM overheating . . if you read my post linked above its exactly the same as happened to me . . .

 

[Frozennova]

its an intake fan that blows over the top of the vrm heatsinks, ive got a good supply of 80mm fans and cable ties so I'll arm myself tomorrow and see if it yields any success

 

[Muel]

I disabled my cool and quiet as my Phenom II at 3.7GHz runs 25'c idle so never saw any need for it.

It also reduces electricity usage. A useful feature with a 140w CPU. (In my case).