FX-8350 F@h unstable

[csimon]

After 24 hours stable at previous settings I've decided to take it up a notch:

BIOS settings:
Current CPU Speed: 4300mhz
CPU Ratio: 21.5
CPU Bus: 200
Mem Freq.: DDR3-1866mhz
CPU/NB Freq.: 2200mhz
HT Link Speed: 2200mhz
DRAM Timings: 8-10-9-27-1T
CPU Voltage: 1.40v
CPU/NB Voltage: 1.1875v

 

[csimon]

Took it to the following level and did get fail after 36 hours. I know it needs a voltage bump or two.

BIOS settings:
Current CPU Speed: 4400mhz
CPU Ratio: 22
CPU Bus: 200
Mem Freq.: DDR3-1866mhz
CPU/NB Freq.: 2200mhz
HT Link Speed: 2200mhz
DRAM Timings: 8-10-9-27-1T
CPU Voltage: 1.40v
CPU/NB Voltage: 1.1875v

 

[csimon]

Now in testing, so far 24 hours stable:

BIOS settings:
Current CPU Speed: 4500mhz
CPU Ratio: 22.5
CPU Bus: 200
Mem Freq.: DDR3-1866mhz
CPU/NB Freq.: 2200mhz
HT Link Speed: 2200mhz
DRAM Timings: 8-10-9-27-1T
CPU Voltage: 1.4625v
CPU/NB Voltage: 1.1875v

 

[csimon]

Now in testing, so far 24 hours stable:

BIOS settings:
Current CPU Speed: 4500mhz
CPU Ratio: 22.5
CPU Bus: 200
Mem Freq.: DDR3-1866mhz
CPU/NB Freq.: 2200mhz
HT Link Speed: 2200mhz
DRAM Timings: 8-10-9-27-1T
CPU Voltage: 1.4625v
CPU/NB Voltage: 1.1875v

These settings have proved stable all week.

 

[RGone]

Good. Enjoy.
RGone...

 

[csimon]

Had to bump the volts up a notch because of a F@h error again. These are my current settings. I left it this way for a week while on vacation and came back to a shut down smp. I could not revive the monitors but I could hear the gpu cranking away on a wu. When I checked my production for the week it was poor, which indicates it had been down for awhile. I assume smp had crashed earlier in the vacation.

Anyway, here are current settinggs:

BIOS settings:
Current CPU Speed: 4500mhz
CPU Ratio: 22.5
CPU Bus: 200
Mem Freq.: DDR3-1866mhz
CPU/NB Freq.: 2200mhz
HT Link Speed: 2200mhz
DRAM Timings: 8-10-9-27-1T
CPU Voltage: 1.46875v
CPU/NB Voltage: 1.1875v

Should I bump to 4.75v to try and stabilize? Temps seem to be ok, at around 60c full oad.

 

[Johan45]

I think your NB speed and voltage are too low for the 1866 ram.
This is just my experience with my chip and I've played with it alot. I have my NB at 2500 and HT at 2250. I also found that Increasing my NB/CPU voltage to 1.35 helped stabalize things and also allowed me to drop my Vcore by 1 notch.
I think the 8cores can really give the IMC a work out and it just needs a bit more voltage to help it along.
Like I said this works for me may not work for you.

 

[ssjwizard]

The most important thing is to change ONE value at a time. If you go off and change 3-4 things at once you will never know what actually solved your problem. As for raising the vCore go for it, just make sure you keep an eye on it after doing so. I really believe these CPUs are alot more tolerant than most people give them credit for.

 

[Johan45]

I went back and reviewed Is that the same ram that you've had since post 1? It's only rated at 1333 and the last profile shown is for 1370. Now I see that it will run at1866 but that could be what is throwing errors at you out of the blue. Maybe loosen the tiomings abit or at least 2T

 

[csimon]

I went back and reviewed Is that the same ram that you've had since post 1? It's only rated at 1333 and the last profile shown is for 1370. Now I see that it will run at1866 but that could be what is throwing errors at you out of the blue. Maybe loosen the tiomings abit or at least 2T

This memory is all I've ever had with this rig. It's this Redline® — 996997 - 8GB (2x4GB) DDR3 PC3-17000 9-11-10-28 Redline (996997) batch.

In the meantime I've upped my voltage to the following:

BIOS settings:
Current CPU Speed: 4500mhz
CPU Ratio: 22.5
CPU Bus: 200
Mem Freq.: DDR3-1866mhz
CPU/NB Freq.: 2200mhz
HT Link Speed: 2200mhz
DRAM Timings: 8-10-9-27-1T
CPU Voltage: 1.475v
CPU/NB Voltage: 1.1875v

 

[Johan45]

I had to ask cause of the spd tab you posted back at the start of the thread, which lists your ram as 1333 and your highest spd settings were for 1370.
I still think that 1.1875 is too low for your NB voltage.

 

[Mandrake4565]

I still think that 1.1875 is too low for your NB voltage

+1

 

[csimon]

I had to ask cause of the spd tab you posted back at the start of the thread, which lists your ram as 1333 and your highest spd settings were for 1370.
I still think that 1.1875 is too low for your NB voltage.

I don't see that in my first post ...especially the 1370 part.
I will bump my cpu/nb voltage a notch though. What I am currently listing is default.

 

[Johan45]

This comes from post #3




And I just assumed that the settings you were displaying were what you were running.

 

[csimon]

This comes from post #3


View attachment 125670

And I just assumed that the settings you were displaying were what you were running.

Ah yes, I gotcha now. I was at those settings at that moment. I upped it later in the game. Sorry about that.

My new current settings:

BIOS settings:
Current CPU Speed: 4500mhz
CPU Ratio: 22.5
CPU Bus: 200
Mem Freq.: DDR3-1866mhz
CPU/NB Freq.: 2200mhz
HT Link Speed: 2200mhz
DRAM Timings: 8-10-9-27-1T
CPU Voltage: 1.475v
CPU/NB Voltage: 1.2v

 

[Johan45]

My gut feeling is still like I said in post 67 . The eight core CPU and faster RAM really floods the IMC. I feel that the sporadic failures you're seeing is more of a memory/IMC issue than it is a core issue.

 

[csimon]

My gut feeling is still like I said in post 67 . The eight core CPU and faster RAM really floods the IMC. I feel that the sporadic failures you're seeing is more of a memory/IMC issue than it is a core issue.

Hopefully now this will all go away with current settings/voltages.

 

[azanimefan]

looks like temps to me.

around 60C-65C things get screwy for AMD PhII/FX cpus; might want to get your temps down to 55C... for the PhII that was generally the limit for a stable cpu... and while it looks like the FX chips can run hotter, its not by much from what i've been looking at online.

you have nearly a month worth of voltage tinkering and are no closer to solving the problem. i'm willing to bet the system temps are at the root of the issue.

 

[ssjwizard]

Yes but the tinkering he has been doing with the vCore is also very conservative. He has yet to just let the throttle open on the VRM and see where it takes him.

There is a certain measure of teaking he can do to try and get absolute stability at this point, but he may be uncomfortable with the settings required to do it.

 

[csimon]

Yes but the tinkering he has been doing with the vCore is also very conservative. He has yet to just let the throttle open on the VRM and see where it takes him.

There is a certain measure of teaking he can do to try and get absolute stability at this point, but he may be uncomfortable with the settings required to do it.

I'm open to suggestions if my current settings don't work.