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1090T can't get past 4.0Ghz.

post #1 of 28
Thread Starter 
My system seems very stable at 4Ghz with only a slight CPU core voltage increase, but as soon as I go to 4.1Ghz (with any voltage up to 1.55v) my system will report errors in Prime95 results.txt after only a few minutes. If I attempt to bump up the voltage higher in attempts to stabilize, the system gives a blue screen of death (physical dump of memory).

I think I hit the max on my setup\\CPU. Does any one have any recommendations?

I haven't even OC's the NB yet, I know lots of people report good results by bumping it from 2000Mhz to 2600Mhz or 2800Mhz. If I attempt this, will I need to also increase the NB core voltate? as well as the NB-CPU voltage?

My CPU temps are't even going over 50c.

Thanks for the help in advance!
Edited by thestef - 4/25/11 at 8:11am
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post #2 of 28
Increasing the NB speed might help with stability as it did with me, try to get it at 2.6GHz or higher with cpu-nb at 1.37V and get the CPU at 1.5V and memory to 1.55V
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post #3 of 28
Thread Starter 
I nodiced a NB voltage setting as well as a CPU-NB votage setting... should I increase both of these to 1.37V or should I leave the NB voltage set to Auto and just bump up the CPU-NB to 1.37V?

I also noticed the MAX cpu voltage in my BIOS is 1.5V or 1.55V... should I really be going up that high?
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post #4 of 28
Quote:
Originally Posted by thestef View Post
I nodiced a NB voltage setting as well as a CPU-NB votage setting... should I increase both of these to 1.37V or should I leave the NB voltage set to Auto and just bump up the CPU-NB to 1.37V?

I also noticed the MAX cpu voltage in my BIOS is 1.5V or 1.55V... should I really be going up that high?
What CPU cooling do you have? And yeah, CPU-NB to 1.37v and NB to 1.15v and the Phenom II are fine upto 1.55V
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post #5 of 28
Are you reading core temps or socket temp?

My sig rig only needs 1.42ish volts for 4.0GHz. I have plenty of voltage headroom and easily got 4.1 and 4.2GHz without getting anywhere near 1.55v. What kept me from staying at those clocks is temperatures.
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post #6 of 28
Thread Starter 
I have some type of aftermarket OCZ heat sink, I think its vantage or something like that, it seems to be doing a good job so far.


I left the CPU OC at 4Ghz with voltage at 1.5V... I set the NB at 2.6Ghz, cpu-nb at 1.37v, memory at 1.55v, but I didn't initialy set the NB at 1.15v and as I was typing my pc froze, I went back in the BIOS and set the NB at 1.16v (just in case)... seems ok now for web browsing lol

I'll be running another prime95 to see if its stable.
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post #7 of 28
Does your motherboard have LLC?
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post #8 of 28
Thread Starter 
Quote:
Originally Posted by LastBucsfan View Post
Are you reading core temps or socket temp?

My sig rig only needs 1.42ish volts for 4.0GHz. I have plenty of voltage headroom and easily got 4.1 and 4.2GHz without getting anywhere near 1.55v. What kept me from staying at those clocks is temperatures.
Yeah, I was only OC'ing the CPU initialy with the core multi and the only way I managed to get is stable was by bumping up the voltage to 1.49.

My system seems more stable now after increasing the NB voltage to 1.16v. My CPU temp went up to 54c after aprox 5 minutes or prime95, then I got an error in Prime 95 results.txt. (system didn't freeze this time).

I think I'll have to bump the voltage some more, but I"m not sure if I should bump the voltage for the CPU-NB or the NB only. My stock memory voltage (manufacturer voltage is 1.35v, so I would think 1.55v should be plenty for Over clocking).
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post #9 of 28
Thread Starter 
Quote:
Originally Posted by LastBucsfan View Post
Does your motherboard have LLC?
What is LLC?

Just as a side note, I disabled cool and quiet as well as the build in OC in the BIOS.
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post #10 of 28
Thread Starter 
BTW, my heat sink is a OCZ Vendeta 2....

I've been running prime for about 5 to 10 minutes, no errors or system freeze yet.

CPU at 4ghz (multi only)
NB at 2.6Ghz
CPU at 1.5v
CPU-NB at 1.40v
memory at 1.55v
NB at 1.18v


CPU temp max so far is 55c

Screen shot of CPU Hardware Monitor... does every thing look ok?

I'm assuming Prime95 is pushing my system probably as much as any gaem ever will? is this correct?
My AMD/ATI build
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CPUMotherboardGraphicsRAM
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OCZ Vertex 2 Windows 7 Home 42 Inch Panasonic 1080p Plasma Antec Truepower 750W 
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My AMD/ATI build
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CPUMotherboardGraphicsRAM
AMD FX-8350 (4..60Ghz) Gigabyte 990FXA-UD5 XFX R9-290 G.SKILL 8GB DDR3-1600Mhz 7-8-7-24 
Hard DriveOSMonitorPower
OCZ Vertex 2 Windows 7 Home 42 Inch Panasonic 1080p Plasma Antec Truepower 750W 
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