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1090T can't get past 4.0Ghz. - Page 3

post #21 of 28
Quote:
Originally Posted by thestef View Post
Are all of you guys at 4.0ghz fully stable when running Prime95?

The reason I ask is because I was initially able to run a few 3dMark Vantage bench marks without any issues at 4.0Ghz even at 4.2Ghz, however if I run Prime95 I get hardware calculation errors.

I lowered my RAM speeds, from 1600Mhz to 1400Mhz and I still got error in Prime95 when Oc'ing my chip past 3.8Ghz to 3.9Ghz.... so I don't think the RAM is at fault. However my RAM Voltage manufacturer spec is 1.35v and my BIOS is auto detected it at 1.50, and I increased it to 1.55 thinking that might be the problem. I wonder if to much ram voltage would cause it to be unstable.

Any way’s, I had to bump down my OC to 3.8Ghz to get Prime95 to run without any errors for aprox 1 hour. I think I'm also stuck leaving the CPU voltage at 1.55v, (1.42 BIOS) (1.55v under load)/(Vboost). I guess it’s not so bad since if the CPU isn't under load the voltage stays at1.42.

I have this weird feeling that I can’t get past 3.8Ghz stable in Prime95 because of this board or the Vboost option that I can’t disable in the BIOS.

Like I asked initially are all of you guys really stable on Prime95 at 4Ghz? or are you only fully stable within games and bench market software ?
I've run P95 for ~5 hours completely stable. I know I should run it longer to be certain, but temps are pretty good (43c, max) and the voltage is right at the default 1.375. It is stable enough for my uses.
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post #22 of 28
Thread Starter 
Did you notice your CPU vcore go up under load in windows\\HWmonitor?

Did you round off checking in prime95? before you ran Prime 95, maybe this is making a difference. I get error reporting that Prime95 received 0.04 but was expecting 0.05 ???? this is being reported I beleive in the result.txt file, is any one else on this forum even checking this file for results or is every one just assuming that their systems are stable because Prime95 isn't crashing their system or Windows?

It just doens't make any sense to me that I'm stuck at 3.8Ghz and as soon as I go over my system is unstable and every one else on this forum is reaching 4.0Ghz (apparantly stable).

Does any one know how I would confirm if my RAM\\CPU or NB is causing errors?
Edited by thestef - 4/30/11 at 7:31am
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post #23 of 28
Quote:
Originally Posted by thestef View Post
Did you notice your CPU vcore go up under load in windows\\HWmonitor?

Did you round off checking in prime95? before you ran Prime 95, maybe this is making a difference. I get error reporting that Prime95 received 0.04 but was expecting 0.05 ???? this is being reported I beleive in the result.txt file, is any one else on this forum even checking this file for results or is every one just assuming that their systems are stable because Prime95 isn't crashing their system or Windows?

It just doens't make any sense to me that I'm stuck at 3.8Ghz and as soon as I go over my system is unstable and every one else on this forum is reaching 4.0Ghz (apparantly stable).

Does any one know how I would confirm if my RAM\\CPU or NB is causing errors?
That is a CPU-NB and/or RAM error.
Raise your RAM volt 1 notch at a time and test.
If still got those errors, drop your RAM voltage 1 notch at a time and test. If still unstable, set your RAM volt @ stock voltage(on RAM sticker), and adjust your CPU/NB volt
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post #24 of 28
Thread Starter 
Thanks for the help, I had a feeling something else is affecting my OC and not the CPU OC. I’ve run 1.63 volts (unknowingly) and the temps only went up to 56C and my OC was still unstable in Prime95 after only a few minutes…. I suspect with this kind of voltage and OC the CPU shouldn’t logically be at cause.

I'll definitely try higher voltage on my memory, what should be the voltage cut off point? 1.6v / 1.7v ?
The part that worries me is that the manufacturer spec voltage is only 1.35v, is 1.7v really safe?

I don’t remember my NB voltage but what is a safe voltage\\heat cut off point for the NB? as I increase the NB voltage, should I also increase the CPU/NB voltage at the same time?
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post #25 of 28
one step at a time. if you think it is your ram try loosening up the timing say 9-9-9-24, give that a shot,and keep your nb and ht at 2000,just try 20x200 on your cpu and see if it will run, after you get your cpu running at 4.0, than work on your nb settings, after you get that running, than go to your ram settings and so on, best thing is to take your time, one step at a time.
    
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post #26 of 28
For 4.0GHz under load you need 1.45v.
You also want to make sure the core doesn't go above 53/54c.

I use IntelBurnTest or Linx to stress test my CPUs.
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post #27 of 28
For getting to 4.0,it realy depends on other settings and hardware, i get 4.0 on mine 24/7 stable with 1.4vcore and 3000nb speeds with everything else oc,ed.,my temps barely hit 50c at thoses settings.
    
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post #28 of 28
Thread Starter 
I know its been a while since I responded back to this thread but I had to RMA my video card... I finally received the new one today.

I increased the CPU-NB and memory voltage and so far (10 minutes into Prime95) at 3.9Ghz and my OC is finally stable.

It honestly looks like my CPU v-core wasn't the issue after all.

My next step is to try and bring it up to 4.0Ghz, possibly 4.2 or even 4.3Ghz. Then to bring down the CPU-v-core, CPU-NB and memory voltage as low as possible until I hit stability issues.

Is there really a maximum OC I can reach?

At the moment my CPU temps are staying at 44c.

Thanks for every one help! its really appreciated.
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