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Gigabyte G1 Gaming 970, only +25 Core Voltage, Low TDP use

post #1 of 27
Thread Starter 
A couple days ago I received my GIGABYTE GV-N970G1 GAMING-4GD GeForce GTX 970. I am a newbie to overclocking as the last two gpus I have owned were a GTS 450 and GTX 650. I spent the money and decided to get a nice GPU, I have been screwing around with overclocking it quite a bit. However I have noticed two things that I am confused about:

1. Factory Default Voltage for my card is 1218 mv, but when I use MSI Afterburner to raise the voltage by +87 mv, the actual voltage rise from sensors has never gone past 1243 mv. This is only a +25 mv increase eh-smiley.gif

2. Even under extreme overclocking and benchmarks, I have not seen the card TDP go above 89%, This doesn't seem right considering many reviews and other users of GTX 970's are claiming the overclocking limitation is TDP!

From my experience, this GPU is just as stable running 1500 Mhz core clock and effective 8000 Mhz memory on stock voltage and power limit than not. Thats right, raising the voltage and power limit to maximum does not help whatsoever on overclocking. I have pushed this card right up to where it starts to artifact on stock voltage and power limit, then raised the voltage and power limit to maximum (+87 mv and 112%) and the card gets no more stable! headscratch.gif

I don't have much experience with overclocking, but I thought you are supposed to be able to push the card farther when you raise the voltage and power limit...

Can anyone else with experience answer my questions?
post #2 of 27
Quote:
Originally Posted by Ocman76 View Post

A couple days ago I received my GIGABYTE GV-N970G1 GAMING-4GD GeForce GTX 970. I am a newbie to overclocking as the last two gpus I have owned were a GTS 450 and GTX 650. I spent the money and decided to get a nice GPU, I have been screwing around with overclocking it quite a bit. However I have noticed two things that I am confused about:

1. Factory Default Voltage for my card is 1218 mv, but when I use MSI Afterburner to raise the voltage by +87 mv, the actual voltage rise from sensors has never gone past 1243 mv. This is only a +25 mv increase eh-smiley.gif

2. Even under extreme overclocking and benchmarks, I have not seen the card TDP go above 89%, This doesn't seem right considering many reviews and other users of GTX 970's are claiming the overclocking limitation is TDP!

From my experience, this GPU is just as stable running 1500 Mhz core clock and effective 8000 Mhz memory on stock voltage and power limit than not. Thats right, raising the voltage and power limit to maximum does not help whatsoever on overclocking. I have pushed this card right up to where it starts to artifact on stock voltage and power limit, then raised the voltage and power limit to maximum (+87 mv and 112%) and the card gets no more stable! headscratch.gif

I don't have much experience with overclocking, but I thought you are supposed to be able to push the card farther when you raise the voltage and power limit...

Can anyone else with experience answer my questions?
Hi

First off Just about everything you posted is totally normal .
The amount of voltage that the card will go up depends on bios and drivers , nobody cards goes up the 87mv amount .
AFAIK your card max is 1.256 approx you can check by maxing slider and checking GPU-Z performance Cap reasons >VOP , if you see that then that is max .
You can also see and set it in MSI AB4.0 too .

On TDP you want a low % during max OC as that gives you more headroom to "possibly" go further .

It seems adding voltage to these chips gives only marginal improvements .
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post #3 of 27
Thread Starter 
Hmmm, monitoring with GPU-Z and Afterburner has never shown a higher voltage than 1.243 after maxing the slider no matter what I do. I guess if I cant get 1.256 that's just my card.

Thanks for the advice, although I have to admit I am disappointed that I see absolutely no improvement when changing voltage and power limit settings...

Looking at your rig, you've got a MSI 970, how has your success with overclocking it been?
post #4 of 27
Quote:
Originally Posted by Ocman76 View Post

Hmmm, monitoring with GPU-Z and Afterburner has never shown a higher voltage than 1.243 after maxing the slider no matter what I do. I guess if I cant get 1.256 that's just my card.

Thanks for the advice, although I have to admit I am disappointed that I see absolutely no improvement when changing voltage and power limit settings...

Looking at your rig, you've got a MSI 970, how has your success with overclocking it been?
when you max voltage what does GPU-Z say on perCAP reason ,what colors show ?

I haven't really pushed mine past 1500 is I will eventually hit TDP limit (probably about 1525-1550 (if its still stable) .

I am not into pushing to limit as it gains you very little .

If you have been reading many of posts voltage does very little for most, that is normal . sometimes it causes more problems as if voltage drops down while your still in high OC, you can have stability issues .
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post #5 of 27
Thread Starter 
I just ran a benchmark with Tomb Raider and used the GPU-Z sensor in the background, here is what the display shows:



As you can see, the limiting factors are apparently reliable voltage and operating voltage. This is while running my GPU at +87mv.

Here is the sensor log showing the max voltage during the test at 1.243 volts:
GPU-ZSensorLog.txt 53k .txt file
post #6 of 27
Quote:
Originally Posted by Ocman76 View Post

I just ran a benchmark with Tomb Raider and used the GPU-Z sensor in the background, here is what the display shows:



As you can see, the limiting factors are apparently reliable voltage and operating voltage. This is while running my GPU at +87mv.

Here is the sensor log showing the max voltage during the test at 1.243 volts:
GPU-ZSensorLog.txt 53k .txt file
Vop is max you can run, what I see is normal , every chip is different on running voltage .
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post #7 of 27
Thread Starter 
Alright, thanks for the advice then. Looks like I will keep my overclock right where its at.
post #8 of 27
Not just your card. I get almost same results and was also confused by that.
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post #9 of 27
The cards need a modded bios and it will fix some of the issue, especially the undervolting/downclocking during certain menus/less stressful situations in certain games that is causing crashes ( Shadow of Mordor, BF4). Hopefully Skynet will get one out soon but who knows.
post #10 of 27
Im having exactly the same issue with the g1, never gets over 89.9% and the max stable clocks were at 1530 /3900 if i push it more it either crashes or start seeing Green/blue artifacts,this is so stupid the only reason for getting this brand (gigabyte) was for it being the "best overclocker in all the 970's" and now it wont overclock for sh%t
Quote:
Originally Posted by RaleighStClair View Post

The cards need a modded bios and it will fix some of the issue, especially the undervolting/downclocking during certain menus/less stressful situations in certain games that is causing crashes ( Shadow of Mordor, BF4). Hopefully Skynet will get one out soon but who knows.
So when, how, where can we get those modded bios ?
Edited by MKOB - 10/22/14 at 10:49pm
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