Quote Originally Posted by vario View Post
First of all, thank you.So much good and concrete information.So it IS a new revision, albeit minor one.Thats a good thing.
On the prime95 thing, problem is, it IS a real world piece of software that does actually SOMETHING of use and is not a real power virus, you can join the community and help in Great Internet Mersenne Prime Search.So im not fully with you on that, although im more of a realist, so if your method will net me a 100% stable PC im all for it, until now only when i was prime 95 blend AND large stable none of my software hanged sooner or later, sometimes it could take 12h of encoding while doing another work but it would freeze/hang/quit the encoder.

Another thing is, there are 2 ways to set up an overclock at least on my mainboard, 1.APM ON i get turbo but fluctuating CPU clocks, when set at 4ghz they hover between 3.7 and 4 ,this results in lower power consumption also. or 2.APM OFF, i get no turbo rock stable 4ghz and higher power consumption.
So ,not everyones results are comparable :-/.Disabling APM is also a part of official AMD perf tuning guide here:
http://sites.amd.com/us/Documents/AM...ning_Guide.pdf

Anyhow, awaiting your results and a question, could you test NB clocking in this revision ? anything upwards 2400-2500 is really hard to get fully stable on mine.
Thank you again for loads of info.
I don't think the normal use of Prime95 result as high power draw as the torture test, or does it?
AMD has some specially developed power viruses created to simulate worst case (unrealistic) workloads and these softwares result lower power consumption than the most recent version of Prime95 LargeFFT torture test.

The trouble with Prime95 is that the stress it creates can actually damage the CPU, the motherboard or even both.
The CPU package current rating is exceeded as are the ratings of all of the other VRM related components.
Even the EPS12V connector and cables, in case you don't have the ATX12V connector to share the load is at melting point.

Even if you don't manage to burn the VRM for example you will be putting out a lot of extra heat.
If your CPU pulls 220W during Prime95 the VRM alone is dissipating 55W of power.
In overload conditions the VRM efficiency drop to ~ 80% or even below.

Regarding the CNB I haven't tested it at all, only on LN2.
For me it doesn't matter much as long as it is able to do syncronous with 2x8GB DDR-2400 memory.

Regarding Apm(Master): When enabled the Apm estimates the power consumption of the CPU and modulates the clocks in case the TDP limit is reached. Turbo requires Apm as otherwise it doesn't know the power consumption and when to engage or disengage the Turbo Boost. Since the highest boost is only available when half of the CUs are gated the C6 must be enabled in order to make Turbo Core boost work as it should.

You can actually have all of the above without having any TDP restrictions, however thats one of the tricks in my sleeve ("Infinite Turbo").
HPC is actually quite a bogus feature as it's only purpose is to fool to Apm / Turbo.

When the TDP limit is reached the Apm will shuffle down the PStates until the power consumption drops below the TDP limit.
Enabling HPC disables all of the PStates between the Pb0, Pb1, P0 and the throttling PState so that Apm cannot shuffle them down.
That way the CPU frequency stays at P0 (minimum) unless the thermal throttling limits are reached.

btw. The clocks for FX-8370 models:

FX-8370E = 3.3GHz (Base), 3.6GHz (Boost, 4CUs active), 4.3GHz (Boost, 2CUs active, 2CUs gated)
FX-8370 = 4.0GHz (Base), 4.1GHz (Boost, 4CUs active), 4.3GHz (Boost, 2CUs active, 2CUs gated)