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Overclocking Sapphire HD 6870

post #1 of 7
Thread Starter 
Hello mates, im new in this forum and i would greatly appreciate if you could give me a little bit of help with my first GPU overclocking..
I own a Sapphire HD 6870. It's equiped with its stock cooler and its rather new(bought before a month or two), so i would like to know how easy is it to overclock this and how much could i overclock this with its stock cooler. Also is it safe to overclock this? I really dont want to damage it. Or is there a safe frequency that i can reach with 100% chance without any chance of damage? If the procedure is safe then i would gladly read your opinions.
Thanks in advance.
Sacred Moon
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Sacred Moon
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post #2 of 7
What I run.


Its safe.
post #3 of 7
Download MSI Afterburner, probably the best software for OC'g gpus.I was able to reach higher stable clocks with it verses Sapphire Trixx. You should be able to reach 1 gig on core with 1.25 volts. After downloading you need to go into the config folder, enter programfiles/msiafterburner/msiafterburner(config file), at the bottom there are two settings you need to change. First unnofficial overclock, change the value to 1. Second, provided you have the lastest version, you will see unnofficialoverclockeula. You will need to type the following, I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it This unlocks any voltage or speed limitation your card may have, provided you have a reference card. Some non ref cards have voltage control as well but not all. Hope this helps
The BEAST
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The BEAST
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post #4 of 7
I also wouldn't recommend TriXX.
It is pretty bad a load fan profiles.

Gotta DL MSI AB
Just got my 6870 yesterday for my Beach rig, an amazing card for $180.00
post #5 of 7
Thread Starter 
is the overclocking process always standard? do i do it the way this guide says? exactly step by step? http://www.overclock.net/ati/633816-...r-ati-gpu.html
Sacred Moon
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Sacred Moon
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post #6 of 7
Thread Starter 
anyone?
Sacred Moon
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Sacred Moon
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Black Ice GTX480 Dual Laing DDC-1T w/ EK Dual Top Windows 7 Ultimate 64-bit Samsung T220HD 
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post #7 of 7
I use the Trixx software without issues, I have my 6870 clocked at 1020 core 1170 memory. The custom fan ramping is pretty sweet and my card hasn't gone past 68*c on furmark. Just make sure it's the latest Trixx version, I've heard complaints about the older versions but remember it's still in beta testing so if it starts to give you issues look for an update.

For OC the GPU bump it 10mhz on the core and test for 5min on furmark. If it doesn't artifact, crash, or anything else that's bad bump it up another 10mhz till it does artifact and then bump it back down 10mhz from where you where. Same for the memory but do this last so you know what's causing the instability. I figured if I OC the core 120mhz then the mem should be bumped up 120mhz or close to it. For good measure when you have it clocked at what you want run furmark for 15min and you should be fine. I'm no expert as this only my second system to OC the CPU and GPU but what I'm doing seems to work just fine without issues. I recommend just educate your self on this stuff and ask as many questions as you want.
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Behemoth
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