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1090t passing small fft and blend but failing large - Page 2

post #11 of 28
Try to get your HT back to 2000mhz. Its a little low. Also, post your rig in your sig so we can see what components you are working with.

Can you run HWmonitor while you are running your small fft so that we can see your voltages and temps in real time?

One thing you can do is reset your cmos and run the test that you are failing. If it doesn't pass at stock settings, then you can start checking individual components.
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post #12 of 28
Thread Starter 
^updated the sig rig. Also I was reading that the thuban chips like to have the HT link and cpu/nb to be fairly close, is that right? i"m actually starting from scratch with the oc to find a good bus speed but i'll bump up the HT link.

EDIT: Starting a new OC from the base. All settings shown on 1st post.
Edited by dumafourlife - 11/1/12 at 3:29pm
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post #13 of 28
Thread Starter 
Just curious but is it normal if my core speed fluctuates during prime95 testing? It fluctuates from a slow core speed to oc'd speed.
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post #14 of 28
Are you doing anything while it is running?
post #15 of 28
Thread Starter 
Nothing at all.
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post #16 of 28
Hmm, mine doesn't do that. The only thing that comes to mind is throttling, but you said your temps are good.
post #17 of 28
Thread Starter 
^ I was thinking throttling too. I toned down the bus speed and it seems to not "throttle" the core speed. I think my components are limiting what I want to do so I'll just have to accept that and find the most stable oc under what I posted.
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post #18 of 28
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post #19 of 28
HT should always be 2000 or very close to it.

1: Failing Large FFT is likely CPU-NB unstable or RAM unstable. It can also be NB if your'e overclocking the NB.

2: If your CPU speed is fluctuating during full load, it's either CPU throttling for excessive CPU heat, or CPU throttling from VRM overheating. I have to put a fan on the VRM heatsink my M4A79XTD Evo to run overclocked as X6, or it throttles the CPU during stressing because the VRMs overheat.

3: How are you setting your RAM? Is it at correct timings, speed and voltage?

4: Are you overclocking CPU-NB? Alot of people just do that randomly. You have to test and tune it like anything else AFTER you know your RAM and CPU are stable, not all together.

You should get each part stable one at a time, or it will be very difficult to tell which part is failing.

First thing I'd do is set your RAM correctly, set CPU-NB to stock 2000, set CPU speed to stock and see if it passes large FFT. If not you have a RAM problem most likely. If it passes, OC your CPU again without touching CPU-NB. Etc etc, one part at a time. I'd do as much as possible with multiplier OC before starting to move the NB clock.
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post #20 of 28
Thread Starter 
Quote:
Originally Posted by 2thAche View Post

HT should always be 2000 or very close to it.
1: Failing Large FFT is likely CPU-NB unstable or RAM unstable. It can also be NB if your'e overclocking the NB.
2: If your CPU speed is fluctuating during full load, it's either CPU throttling for excessive CPU heat, or CPU throttling from VRM overheating. I have to put a fan on the VRM heatsink my M4A79XTD Evo to run overclocked as X6, or it throttles the CPU during stressing because the VRMs overheat.
3: How are you setting your RAM? Is it at correct timings, speed and voltage?
4: Are you overclocking CPU-NB? Alot of people just do that randomly. You have to test and tune it like anything else AFTER you know your RAM and CPU are stable, not all together.
You should get each part stable one at a time, or it will be very difficult to tell which part is failing.
First thing I'd do is set your RAM correctly, set CPU-NB to stock 2000, set CPU speed to stock and see if it passes large FFT. If not you have a RAM problem most likely. If it passes, OC your CPU again without touching CPU-NB. Etc etc, one part at a time. I'd do as much as possible with multiplier OC before starting to move the NB clock.


2. I think you're right, i believe its due to my VRM heating up.
3. TImings, and speed should be correct but I believe voltage is off.


I tested stock values earlier today and they pass no problems. I think it was just my lack of overclocking knowledge that has led me to this dead end. I am working my way up from stock as you had mentioned =)
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