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post #491 of 1059
Quote:
Originally Posted by dph314 View Post

Quote:
Originally Posted by jtom320 View Post

Wow I can't help but being dissapointed reading this thread. 150 mhz OC's seem so small. Not trolling seriously I just really thought you'd be able to get more out of these.

I do believe you, since I am quite...I don't know if "disappointed" is the word (maybe it is). We have all heard the rumors that they are clocked very high as it is, due to being mid-range originally. But this means that power usage went down and performance went way up compared to the 580. I think after more drivers are released and maybe another version of Precision with more customization/control, we will start seeing more stable/frequent overclocks. Even though it's the end user that gets the short end of the stick, Nvidia seemingly chose a low temp as a limit. The power usage on these overclocks is hitting about 110-112%, and the user-defined limit can be set to 132%. I don't see why this limit is so high, yet the temp limits overclocks to only 112% power usage rolleyes.gif Wierd indeed, and again I hope it's addressed soon, because there is still a TON of overclock room when you see most so far hit no where near that 132% limit. But yeah this "660" was ~700mhz core originally (seemingly so, as evidenced by these below-average overclocks), and was released at 1000mhz. That right there, on top of the 100-150mhz OCs people are getting, and this chip is already running technically over 400mhz past its originally intended clock. There's definitely ups and downs to this card- a lot of good ups, and a few more downs than was hoped for. Again I think stock performance is an A+ improvement over the 580 and an A+ for keeping this new efficient architecture flagship at $500, though OC headroom diminished apparently with the bump up in the line-up of this chip. Damn AMD for setting the bar too low!! Totally kidding, don't look into that at all, really just a joke redface.gif

I'm a bit disappointed as you are though, but there's a few good OCs on this thread, and I'm sure there will be more to come as drivers/software/work-arounds progress.



I have a different opinion. I believe Nvidia was going for a huge automatic overclock to really push thermals and electric usage down in many games that didn't need more power and in lower resolution setups,but decided that they need to clock it above the 7970 to begin with to beat it out of the box.

 They never pushed up the core to sell it as top dog, etc. ( all FUD )

 They calculated releasing it at ~700 core speed with +400 dynamic overclock would give the buying public the wrong impression losing the PR war.

 We don't see a lot of 150+ OC higher end cores over the years as a rule of thumb, and you have to add in the 58+ auto-up turbo so @133 OC you're really at 198+ boosted.

 So there's a few factors.

 In other worlds, 700Mhz+ number for stock core with 400+ dynamic clock +boost wound up being the wrong thing to do.


Edited by SeanA - 3/31/12 at 1:01pm
post #492 of 1059
I am still having an issue where my overclock is stable but maybe a few rounds later of Unigine Heaven 3.0 or gaming the 1st card drops the GPU usage to like 70% and stays there and it wont go above. sad-smiley-002.gif

Any ideas?

I think this could be because of EVGA + Gigabyte having different Core speeds, but I did set both manually to 1245MHz and it's all good for hours of gaming, benchmarking, and stress testing.

I don't know why this is happening, after a restart the issue goes away, maybe bad drivers?
    
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post #493 of 1059
Quote:
Originally Posted by kcuestag View Post

I am still having an issue where my overclock is stable but maybe a few rounds later of Unigine Heaven 3.0 or gaming the 1st card drops the GPU usage to like 70% and stays there and it wont go above. sad-smiley-002.gif
Any ideas?
I think this could be because of EVGA + Gigabyte having different Core speeds, but I did set both manually to 1245MHz and it's all good for hours of gaming, benchmarking, and stress testing.
I don't know why this is happening, after a restart the issue goes away, maybe bad drivers?

Maybe its something with this + build-in power limiter, and yeah driver can also be tricky with all that sw monitoring..

341

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_680/30.html
Edited by TheHunter - 3/31/12 at 6:54am
post #494 of 1059
Quote:
Originally Posted by TheHunter View Post

Maybe its something with this + build-in power limiter, and yeah driver can also be tricky with all that sw monitoring..
341
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_680/30.html

I'll keep them on stock for now, I lowered them to 1240MHz (Instead of 1250MHz) and +400MHz Memory (Instead of +450) and doing 130% Power Target (Instead of 132%) it seems to be fine now, we'll see if it happens again, although I will leave them at stock for now.
    
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post #495 of 1059
BTW to clarify my previous post. I was referring to the TDP usage measured in real time, not "power limit" slider in AB.

I will try moving the slider from 132% - 130% to see if that makes any difference.

I'm also a bit confused about the wording. It's labeled "power limit" not "power target"

Is the Precision X slider labeled "target"? I simply thought this slider was the same as sandy OC "allow over TDP limit" for turbo boost style overclocking.
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post #496 of 1059
It's a limit. You can run Heaven at stock and then just boost the target and it will use up to 105% or so. The key is to scroll across the graph and see if it ever matches your power target. If it does you can raise the power target setting. I have seen it downclock in Heaven and then boosted it and it won't downclock. Most games don't go over 110% though. I left mine at 120%. If someone wanted a quieter setup they can lower it and it will throttle the card.
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post #497 of 1059
Thanks for clarifying! Most of the games I've played so far use 120-125%. At my 1277mhz and 1.175v

Also, I got my EVGA high-flo plate today. Let's see if it really does 3c less tongue.gif
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post #498 of 1059
Quote:
Originally Posted by JKDC View Post

It's a limit. You can run Heaven at stock and then just boost the target and it will use up to 105% or so. The key is to scroll across the graph and see if it ever matches your power target. If it does you can raise the power target setting. I have seen it downclock in Heaven and then boosted it and it won't downclock. Most games don't go over 110% though. I left mine at 120%. If someone wanted a quieter setup they can lower it and it will throttle the card.

The thing is I did set mine to 132% so I don't understand why this is happening. tongue.gif

I will try lower TDP (Maybe 125% or 130%) and see if that helps, it was fine for 2 days, weird.
    
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post #499 of 1059
What overclock is stable on stock volts?
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post #500 of 1059
I thought a reboot fixed the low usage problem? I set mine back to 50/200 and I get 1177. The SC's clocks are the same I believe.
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