Phenom II Limits

[noki]

Hi, what i the highest voltage safe for our Phenom II? and how long can it be working at 1.55V ?(for example) Are we reducing a lot the life of our chip with an 1.55V oc??

Other point, can anyone explain me how to increase the NB frecuency?Everytime I try to boot at 2,300 or more it crashes and I've to reset the bios.

[chew*]

Hi, what i the highest voltage safe for our Phenom II? and how long can it be working at 1.55V ?(for example) Are we reducing a lot the life of our chip with an 1.55V oc??

Other point, can anyone explain me how to increase the NB frecuency?Everytime I try to boot at 2,300 or more it crashes and I've to reset the bios.

Anytime you OC you are degrading the chip, safe voltage depends on how cool you can keep the chip. On good air I would muster a guess as 1.55 being the max safe limit for 24/7 use.....I personally would not do it with a poor cooler or stock however.....

I think if you can keep the chip under 55C you will be safe. this is just my opinion however.

Obviously when going cold you can toss more at it, you also risk killing a chip however.

As far as NB clocking every board is different.....

[noki]

Now mine is Occt stable 1H, at 3,7Ghz 1,52V, not sure if it is good or bad, im overcloking Amd for first time.

My cooler is the OCZ Vendetta 2, is it good enough?

After an hour of full load my temps are 56Cº.

PD: I'm on vista 64, would I get lower volts with Win7??

[Loser777]

AMDs 45nm process is far more durable, being able to tolerate much more voltage... I'd have to say that just keeping the chip cool is often not enough to prevent degradation at high voltages.

[noki]

Loser777, so what volts do you think it can tolerate without suffering?

In idle it is 30Cº or less and 1,52 volts..

[Manicdan]

i run mine on water, but i keep the fans at low speed so its very quiet, and i use 1.42v to keep the heat down (the loop also handles my 2900xt) i did some testing, but i dont get much more going from 1.42 to 1.55, but i could have been doing something wrong, im still playing with it. but im stable at 1.42v 3.55ghz

[mAJORD]

Well.

http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/GH_43375_10h_DT_PTDS_PUB_3.14.pdf

The updated thermal and elec' datahseet states, for the highest clocking X940, the MAX vid possible is a whopping 1.425v..

Add the +50mv DC upper tolerence, and you have a 100% Approved by AMD 1.475v Max Vcore.

The Old Phenom 1 had a max vid of 1.30v + 50mb = 1.35v Max.

So given the above, I think it's safe to say,w ith good cooling heading over 1.5v is no problemo.

Add to that, my power power measurments directly comparing CPUs.. it takes 1.425v + a 1Ghz higher clockspeed to pull more juice than a Stock 9950. So keeping temps down @ 1.5+v shouldn't be too difficult

http://img356.imageshack.us/img356/6430/powerconsumptiondw8.jpg

[charged3800z24]

Thanks for the chart and some great info. :up:

[noki]

Thanks!!
Other question, to push the Nb I have to increase the Nb-vid, isn't it?? so My motherboard doesn't show in what Nb-vid I am, it only shows +0,25, +0,50...and if I don't know how it was at default..don't know where I am!! So...Whats the default Nb-vid???

[mAJORD]

Standard will be from 1.15 to 1.30v , I think mine is 1.20 std.

Again though, the max is 1.425v, as single power plane AM2 motherboards use the same supply as the Vcore

[noki]

But in the Bios I have:

vcore
Northbridge voltage
Southbridge voltage
DDR voltage
Northbridge cpu vid

Wich is the motherboard NB one and wich is the L3 cache one?

[pershoot]

But in the Bios I have:

vcore
Northbridge voltage
Southbridge voltage
DDR voltage
Northbridge cpu vid

Wich is the motherboard NB one and wich is the L3 cache one?

northbridge cpu vid should be the IMC voltage. northbridge voltage is the chipset.