PhenomII Overclocking Question

FIR3

FIR3

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Oct 27, 2010
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Its been awhile since i have been around so I will make it short and sweet....my PhenomII 955 had a bent pin and i blew up 3mobo and 4psu's before it finally figured it out...so i upgraded my cpu to a 1090t, and msi compt. me a new mobo a 890fxa-gd70.

Now the question, im current having stability issues based around the CPU-NB overclock I have. My cpu is overclocked to [email protected] using multi. My CPU-NB is overclocked to 2800mhz and my ram is running 1600@7-7-7-20. It runs games just fine for a few hours (5-8hrs) but then i will be surfing the web and it will lock up. I have ran the ram and cpu overclocked individually and no issues with prime95 or games, but add in the CPU-NB and it crashes after about 48 hours no matter what im doing. My CPU-NB is volted to 1.25 is that too high or should i be pushing more power?

Attached is my cpu-z of ram and cpu plus temps and my 3dmark11 score in the background to show it is about 75% stable....im just hunting for that extra stabilty with my cpu-nb overclocked, i can feel and see the difference it makes with the cpu overclocked....it unbottle necks the cpu overclock
 
No. Just no. There isn't a % of stability. If you are crashing when overclocked doing anything, you are unstable.

CPU-NB VID should always be at 1.35v
NB vcore should be up around 1.25v
 
There's only been one time where backing down settings didn't help on my overclocks, and that was when one of my sticks of RAM was bad. That was a pain to diagnose. Lots of failed overclocks, even when it was only 100mhz or so.

Also, won't that NB VID send the CPU temps sky high? I've got mine set to 1.25V for 2600mhz NB frequency (200mhz, 13x multi) and my CPU temps get near 60C on furmark. It's rock solid, but I don't dare push the NB VID any further.

As Phobus said, if an overclock crashes, even after 2 days, it cannot be considered stable. Stable means the system will not crash no matter how much you punish it. Either the system is stable or it isn't. There are no varying degrees of "stable" ;)
 
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there is a big difference between "CPU-NB" and "NB". Nb is on the motherboard and CPU-NB is on the cpu its self, its a design that PhenomII use. @Phobus what is the difference between vcore and vdd?
 
please do not overclock an X6 on that board. You can and most likely, will, fry your VRMs
 
but it has dr mos, i thought that it was meant to handle it, it is 8+2power phase btw
 
GD70 is 4+1 with probably the crappiest implementation of driver mosfets to date.
 
if you look at mad pistols link u see that the cpu has an integrated memory controller, but after some research it seems to only be 4+1, so that is probally my issue
 
yes, amd has an integrated memory controller, but it still uses a north bridge for

PCIe
clock generation
and
Interfacing with southbridge
 
FIR3 said:
there is a big difference between "CPU-NB" and "NB". Nb is on the motherboard and CPU-NB is on the cpu its self, its a design that PhenomII use. @Phobus what is the difference between vcore and vdd?
Click to expand...

I know. CPU-NB is the on-die memory controller. That should never be over/under 1.35v
NB vcore is the voltage on the actual North Bridge. That is like 1.15v stock, and is safe up to ~1.4v

Terminology, mostly. What it's associated with. I don't have a textbook definition, if that's what you're after.
 
mostly im just timid to push my cpu-nb past 1.3v, but i wanted to make i was still with in range
 
on air/water 1090 is better

955 starts to pull ahead with DICE/ln2
 
i know that overclocking my six core to 4.0ghz stable was a lot easier and a lot less volts :D and i really feel like i shot my self in the foot with going to msi...but i got a free upgrade from a 870 to a 890 some im happy there
 
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