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Old January 17, 2011, 01:55 PM
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Default Gigabyte 6850 <3 It (Decent OC'r it seems)

So I bought this graphic card to replace a 9500 GT which was a replacement for a 3870 X2 that died, I have to say I'm loving this 6850, I bought the Gigabyte model and without much effort I've already pushed it from 775 Core, 1005 Memory to 1000 Core, 1200 Memory. Not only is it extremely silent (I can't hear it over my Hard Drive or Corsair H50) but it's also operating at a very nice temperature (or I assume it's nice) - 32c - 36c Idle and 61c is the peak temperature, ambient temperature is 23c currently and 27c - 28c in the case. (Auto-Fan puts it @ 56% at load which is still extremely quiet)



I had a rough time finding a lot of information on this particular card but from what I did find it's been able to go above 1125MHz core clock so I'm going to see how far this will go before it screams. I overclocked this specific model by using Sapphire TRIXX but Afterburner should work too, I bumped the voltage from 1.5v to 1.2v (In trixx this is 1200 on the voltage slider), I'm going to see if I can drop the voltage down to 1.8v and test it's stability tonight.

In other news my new H50 is now keeping my CPU @ 54c (during Prime95 and it sat their for 4 hours) while overclocked to 4GHz, it's not an expensive chip but the E6500 is going to be what I'm using until Socket 2011.
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Old January 17, 2011, 02:24 PM
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Nice try some furmark see whats up. shuold heat your room.
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Old January 17, 2011, 02:54 PM
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Ran Furmark for an hour and 25 minutes earlier. It peaked at 73 and then sat there, Fan Speed automatically went to 64% (and was still extremely quiet) I'm going to assume that if I let this run for more then a few hours it would only top out at 80c which isn't horrible but I like anything below 75c :P.
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Old January 17, 2011, 03:03 PM
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good. when you clock them new gen ati cards, look for fps. decrease means you got to take it down a notch, something to do with error correction and the like.

also detecting artifacts,well,it doesn't work like before anymore.
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Old January 17, 2011, 03:31 PM
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I pushed it up to 1050 on the core and started getting some instability, bumped the voltage up to 1.25v (Probably could have only bumped it to 1.225) and it was fine, however the heat's topping in 81 - 83c range with Furmark after a few minutres. It's not like thats bad with normal usage it'd be lower (I could probably use better airflow in my case). I'm going to drop the overclock to 1000/1200 and leave it there for everyday use but if when I fix the airflow in my case I imagine 1050/1200+ will be fine.

I didn't notice a difference in any of my games with the extra 50MHz.
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Old January 17, 2011, 03:45 PM
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right on, at the top a few mhz here and there wont matter much, unless it bumps you over the 30 fps minimum that some need to make it playable :)
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Old January 19, 2011, 02:11 PM
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Update again, 1GHz CPU clock requires 1174 voltage (1.174), I have this card running stable at 950 / 1200 without touching the voltage. It passed a few hours of FurMark and peaked at 70c. This is with automatic control, if I set it to 100% fan speed the temperatures are much much lower but the noise is annoying :P. Fur mark in benchmarking mode posts no difference in Average FPS between 900 and 1000 core clock so I put it in the middle, dropped the voltage down to stock and am now running it at 36c idle and around 55c after a few hours of gaming.


Fixed some airflow around with my H50 and the temperatures dropped by a few degree's. I'll take the 1c additional temperature difference on my CPU over the 4c difference with this fan configuration.
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Old January 20, 2011, 08:51 PM
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Seems like you got lucky.. I am getting artifacts as soon as I push it past 940 on the Core. I have the same video card. The memory I have put to 1165 and there have been no issues.

Voltage is at 1.200

Wish my Core would at least go up to like 970. Lots of people are reporting 950 on stock voltage. *Sigh* Guess I just got a dud.

Quick question, what kind of voltage would be safe for 24/7 use? Is 1.200 ok, or do I risk burning things out?
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Old January 20, 2011, 10:12 PM
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Don't know about the safe voltage because not enough data exists for me to determine what the safe voltage is. What are you using to scan for artifacts / what are you experiencing artifacts in?.
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Old January 21, 2011, 04:55 PM
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Strangely I didn't see any artifacts in Furmark. I only saw them in Vantage, and even then, only on high settings not performance for some reason.

Perhaps I should test it out in games.
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