Sapphire HD7970 GHz 3GB Vapor-X overclocking question

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matta85

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Oct 27, 2010
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Hi All,

I'm planning to overclock my gpu now. I have overclocked some CPU's before but never a gpu. Therefore I have som questions:

1) My card has a button that overclocks the card from to 1050MHz, should I use this bios for my overclock or should I use the standard 1000MHz profile?

2) When running Furmark 15 min test 1920x1080 4xMSAA: My card reaches about 71-72C (Fan speed: 69% - 72%) @ 1050MHz with around 1.264v - 1.268v, isn't that quite a lot? Could it be that the factory overclock is feeding my card more voltage than it actually needs @ 1050MHz?

3) What is the max voltage and temps i should watch out for?

4) Should I start with overclocking Memory and then the Clock?

5) Furmark, GPU-Z and Trixx. Any additional software needed?

I'm planning using Trixx 4.4.0B Mod with open voltage controll, since this is my first time overclocking gpu should I rather stick with the ordinar trixx that allows only +0.2V increase?

If ayone knows of great GPU OC guides, please post links.


Thank you for your reply in advance :)
 
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06yfz450ridr
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06yfz450ridr

06yfz450ridr

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Thats really weird, when I got mine it was already clocked to 1050 without using the button and runs much cooler. I generally run 55-60c under full load. these cards dont vent out of the case so you need good fans to get the heat out of the case.

how far do you plan on over clocking? I bumped mine to 1100 mhz with no voltage increase and virtually no temp increase.


Ohh also I use msi afterburner with a custom fan curve, you can't adjust the voltage but you can increase the power usage a hair if needed
 
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matta85

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Nice rig you got there and thank you for your reply.

My card came (when I bought it) set to that boost bios/profile runnning at 1050MHz with the button on the card light up, the same did my friends. I have quite good airflow in my case with 2x120mm intake in front, and 2x140mm in roof as well as a 120mm in the back. His card only reaches around 65C while furmark, so I know my card is'nt that great in terms of temps.

I just oc'd my cpu to 4.4GHz, found out that is where my chip's sweet spot is before temps and voltage doesnt make it worth it. In regards to the gpu i'm not quite sure how far I will push it, I probably won't take it all out. Hopefully I will find a sweet spot some where giving my 120hz monitor a nice little boost in frames while playing bf3 :)

Do you know which of the two bios/profile I should use and the steps in how to proceed at it?
Is there a limit where gains in fps flat out and extra oc isn't really worth it?

Thanks
 
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ThatGmodGuy

ThatGmodGuy

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Download your manufacturers lastest drivers, then download their overclocking software. Download a benchmark tool and play around. If your card is made by EVGA, I would recommend using precision x, because it won't let you fry your card. Also, as long as your careful with your overclock, you won't fry your card.
 
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06yfz450ridr

06yfz450ridr

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thankyou

but never had much luck with precision x atleast on my old cards, would cause my game to play like crap when it was running so i switched to msi afterburner.

as far as overclocking id say you can clock your card at the 6gb version clock of 1200-1250 and 1600mhz on the memory with a 10-20% wattage increase. your fps will go up about 10 fps vs the regular ghz clock. but overall it depends how much you want to push your card. those clock speeds i listed you can run all day long with no problems
 
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