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Gigabyte GTX 670 (GV-N670WF2-2GD) default and overlocked core drops! Need help?

post #1 of 6
Thread Starter 
Hi.

I just want to overlock my Gigabyte GTX 670 (GV-N670WF2-2GD) but i found some strange things that i could not explain.

1. As it was said in the GTX 670 Master guide http://www.overclock.net/t/1265110/the-gtx-670-overclocking-master-guide when you are running Unigine Heaven Maxed out on the default resolution you had to have a thick constant line of GPU Clock in monitoring! That is a point that i cant understand. I'm using Pres.X 3.0.4 and the latest Nvidia Beta drivers. So even in "Default" with Power Target at 100% this line is not constant! It always has -13% or even more drops when the target reaches 100% and it corresponds with core voltage that goes down from .175 to .168 or something like that. I don't thing that it is normal because as it was said in Mast.Guide it should be a constant thick line. And that with default settings! Very strange. When i set Power Target to 122% (that is max. in Pr.X setting for my card) everything started to be fine but this Pow.Tg. is not default for the card. Why it happenes so? And regarding to that i cant overlock my card according to Master Guide "constant and thick GPU clock line" because i always have small 13% drops on the line when Power target reaches it maximum. The card seems to be stable in Heaven even with Core offset +130 and memory offset + 400. But i always have that small 13% drops when Power target reaches it maximum. And as you understand the higher offsets get more often of this drops. Even whith settings at C.off. +89 and Mem.off. +100 and Pow.Trg. +122 a have this small drops 2-3 time during the test.

Could anyone help and answer is this small drops normal or not? And why it happens so in default? Why the line is constant only with the power target at +122% at default or with some very small overlock of core and memory? Can it because i plug the card to my Thermaltake Tr2 Bronze 850W only to one of two PCI-E lines that each have a cable with 2x6pin. May be i should try to power it from both lines using one 6pins from each line?

This graph is Unigine run maxed out at DEFAULT card settings. The core line is not constant at all (yellow) is has not reached DB of 1110 that it should be with 100% PT. But as i said if i increase PT it will be constant.



Thank you all. Alex
Edited by MatheriA - 12/1/12 at 6:45am
post #2 of 6
Thread Starter 
Overlocking Gurus) where are you? Noone cant say anything about my post?
post #3 of 6
Quote:
Originally Posted by MatheriA View Post


Could anyone help and answer is this small drops normal or not? And why it happens so in default? Why the line is constant only with the power target at +122% at default or with some very small overlock of core and memory? Can it because i plug the card to my Thermaltake Tr2 Bronze 850W only to one of two PCI-E lines that each have a cable with 2x6pin. May be i should try to power it from both lines using one 6pins from each line?
This graph is Unigine run maxed out at DEFAULT card settings. The core line is not constant at all (yellow) is has not reached DB of 1110 that it should be with 100% PT. But as i said if i increase PT it will be constant.

Thank you all. Alex

You just answered your own question, IF you want to overclock your graphics card, you MUST Set the Power Limit into Maximum...AFAIK, IF You just leave the power in 100 % (default)..., something will happen into your card...(maybe just like yours)....throttle, or hang/crash...because the card can't get more power to help the stabilize.

I always set the power into maximum, IF I want to overclock my graphics card, no matter how big or small the core offset which you're set on AB/PrecisionX, the point is you must set the power into maximum.

Sorry IF my post is not help you at all.
Edited by Sharchaster - 12/1/12 at 7:48am
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post #4 of 6
Thread Starter 
Quote:
Originally Posted by Sharchaster View Post

You just answered your own question, IF you want to overclock your graphics card, you MUST Set the Power Limit into Maximum...AFAIK, IF You just leave the power in 100 % (default)..., something will happen into your card...(maybe just like yours)....throttle, or hang/crash...because the card can't get more power to help the stabilize.
I always set the power into maximum, IF I want to overclock my graphics card, no matter how big or small the core offset which you're set on AB/PrecisionX, the point is you must set the power into maximum.
Sorry IF my post is not help you at all.

Thanks for your reply
I clearly understand what is PT and how it works. If you read my post through carefully and see the pic. you will notice that i have that flowing drops on the core when IT IS NOT overlocked when the card is in default settings! Of course if i put more power to the target (122%) i will have the core constant with a potential ability of some overlocking but again with a small 13% core drops all the way. I have no crashes even at core +130% and memory +400 with PT at Max.. But i have core drops -13% during the tests. Reducing overlock get that drops to appear rarely but they always are. The temp. is never get over 64C.Why i get such a graph in DEFAULT card settings and why i have this drops with PT set to MAX when overlocked (even a littly bit like core +89 and memory +200 for example)??? I cant understand is it normal or not or i have a faulty card?
Edited by MatheriA - 12/1/12 at 8:18am
post #5 of 6
Quote:
Originally Posted by MatheriA View Post

Thanks for your reply
I clearly understand what is PT and how it works. If you read my post through carefully and see the pic. you will notice that i have that flowing drops on the core when IT IS NOT overlocked when the card is in default settings! Of course if i put more power to the target (122%) i will have the core constant with a potential ability of some overlocking but again with a small 13% core drops all the way. I have no crashes even at core +130% and memory +400 with PT at Max.. But i have core drops -13% during the tests. Reducing overlock get that drops to appear rarely but they always are. The temp. is never get over 64C.Why i get such a graph in DEFAULT card settings and why i have this drops with PT set to MAX when overlocked (even a littly bit like core +89 and memory +200 for example)??? I cant understand is it normal or not or i have a faulty card?

hmm I believe its because a driver, have you trying the other driver??? AFAIK, the best driver for overclocking is 304.79 Beta driver.
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post #6 of 6
Thread Starter 
Quote:
Originally Posted by Sharchaster View Post

hmm I believe its because a driver, have you trying the other driver??? AFAIK, the best driver for overclocking is 304.79 Beta driver.

Hmmm. No i didnt try any other. I will try 306.97 Driver WHQL first because its the last stable. And if it will be the same picture will try the one you advised.
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