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1055t - Lemon? .05v negative vdroop WTH???

post #1 of 11
Thread Starter 
I'm trying to get a stable 3.8ghz but this thing is power hungry... Almost like I got the worst of the bunch.

I set the vcore to 1.475 in the bios, but under prime95 small FFT's my vcore reads 1.52v in cpu-z!!!! It's stable, but that much negative vdroop is insane. If I set it to 1.45v, it goes up to 1.488v in cpu-z - but then it Bsods after ~10 mins prime95 small FFT's. My max temp at 1.52v is 63C. My board doesn't have load line calibration.
Edited by Grlzzly - 10/17/11 at 5:25pm
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post #2 of 11
Your board must have some sort of LLC, AMD does not program chips to raise voltage under load last I checked.


Look in your bios, it could be under Load-Line Calibration.


2011-08-13024455.jpg

Is that your bios?

I guess maybe it has a default setting that you can't change??

1.52v is ok, temps are a bit high, but thats just in prime you should be ok for most loads at those settings. You could try backing down the vcore in bios one or two notches, but if it's not stable it's just not stable...

Also try adding another fan for push/pull, the cooler you can get the chip the better your clocks to voltage will be.
Edited by BallaTheFeared - 10/17/11 at 5:25pm
    
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post #3 of 11
It could be llc or offset voltage.
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post #4 of 11
Make sure you disable turbo too, turbo core, and turbo core voltage if your board has those options.
    
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post #5 of 11
Thread Starter 
Quote:
Originally Posted by BallaTheFeared;15347493 
Your board must have some sort of LLC, AMD does not program chips to raise voltage under load last I checked.


Look in your bios, it could be under Load-Line Calibration.


2011-08-13024455.jpg

Is that your bios?

I guess maybe it has a default setting that you can't change??

1.52v is ok, temps are a bit high, but thats just in prime you should be ok for most loads at those settings. You could try backing down the vcore in bios one or two notches, but if it's not stable it's just not stable...

Also try adding another fan for push/pull, the cooler you can get the chip the better your clocks to voltage will be.

yes sir, pin pointed, that's my bios. I've seen revisions of the BIOS for Gigabyte's 990fx motherboards that have LLC, but they are "not available to the public". IIRC it's the guy who did the bulldozer overclocking guide with a ud7 on this forum.


I already have a push-pull config on my coolit eco. The pump is plugged in to the CPU fan header and cpu smart fan control is off so the pump is 100%. The pulling fan is plugged into pwr_fan and the pushing one is plugged into sys_fan. I turned off system smart fan control but I don't know if that affects the pulling fan because it's plugged into a pwr_fan header.


At 1.488v (1.45 BIOS) my CPU seems to be barely stable. Under small FFT's, the screen flickers and windows says "display driver stopped working." It's super freezy, but seems to recover. After ~15mins one worker stops. Do you think maybe giving the MB NB or MB SB more voltage could alleviate this? I find the offset in this mobo seems too high. I have no LLC option and 1.52v is a little more than enough and it's making extra heat that I don't need.
Quote:
Originally Posted by BallaTheFeared;15347560 
Make sure you disable turbo too, turbo core, and turbo core voltage if your board has those options.

I checked, no option for turbo voltage, so that can't be causing problems. Turbo's off.
Edited by Grlzzly - 10/17/11 at 5:46pm
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post #6 of 11
1.488v to 1.52v with one notch up on the voltage in bios?

Ugh, that's terrible...

Have you tried PhenomMsrTweaker?

http://phenommsrtweake.sourceforge.net/

Maybe you can see if setting 1.45v in bios then using the program to fine tune it within windows is a solution, otherwise maybe AMD Overdrive might allow slightly more refined voltage tweaking.

I don't think any of them are needed per say, your voltage is fine there for 24/7 usage, temps are a bit high but thats prime, what kind of temps do you see in your typical usage?
    
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post #7 of 11
It looks like your vid control and voltage control are adding the .35 voltage. That's what I'm being anyway. They are the bottom 2 setings on your bios pic
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post #8 of 11
Thread Starter 
Quote:
Originally Posted by BallaTheFeared;15347825 
1.488v to 1.52v with one notch up on the voltage in bios?

Ugh, that's terrible...

Have you tried PhenomMsrTweaker?

http://phenommsrtweake.sourceforge.net/

Maybe you can see if setting 1.45v in bios then using the program to fine tune it within windows is a solution, otherwise maybe AMD Overdrive might allow slightly more refined voltage tweaking.

I don't think any of them are needed per say, your voltage is fine there for 24/7 usage, temps are a bit high but thats prime, what kind of temps do you see in your typical usage?

Well, I haven't gotten to try out any games with these settings yet. I'm still trying to get it stable in prime first. But gaming is all I do that stresses my system. I'm also running small FFT's, so next is blend. My memory is at 1088Mhz and CPU-NB is at 1904Mhz. Hopefully blend goes smoothly because raising the CPU-NB is the last thing I want to do now that I'm on the brink as far as temps go.

I'm not sure about this phenomtweaker you speak of.. I'll check it now. Are there people that can vouch for it? I thought overclocking is always best when done through BIOS and BIOS only. Now the fact that Gigabyte did not put the option to change LLC levels in their BIOSes for 990fx boards is frickin dumb.
Edited by Grlzzly - 10/17/11 at 6:22pm
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post #9 of 11
Best in bios, but if bios isn't able to do what you need it to do windows programs are good for the final "tweak".

Try what the other guy said, bios looks different than what I saw with 7xx series chipset bios from gigabyte.
    
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post #10 of 11
Are you using Phenom MSR tweaker? Don't set voltages with that if you've modified your voltage from the BIOS (it does what you describe).
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