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How to: 680 overclocking fundamentals - Page 11

post #101 of 115
Quote:
Originally Posted by Arizonian View Post

@qwwwizx - I see why you would have thought that. smile.gif
Yeah I was excited to post my incoming system. I finished the hardware build last night. Software tonight. I should have a new bench with the sand card sane clocks to do a comparison. Ill need to learn a little about Ivy OC'ing first though. Going to do it at 4.0 Ghz like my i7 950 4.0 Ghz and compare clocks. I'm not going to try for anything over 4.50 Ghz. I hear Ivy at 4.5 Ghz is like Sandy at 5.0 Ghz. I'd be more than happy. wink.gif

 

"'I hear Ivy at 4.5 Ghz is like Sandy at 5.0 Ghz.'"

I keep hearing variations of this statement. What, exactly, does it mean?

Either a benchmark reads one value or another, so how could 4.5GHz. possibly equal 5GHz.?

They're both absolute values, completely unlike each other. One has a value of .5GHz. less than the other.

(There is a spoon! Always has been.)

post #102 of 115
its like saying 1 gpu with clocks of 850 core will get the same score in heaven as a different gpu with a 950 core on the same machine. the chips have different architecture and are made in different ways to make one perform better

ivy at 4.5 might just me more efficient and have quicker ways of getting from point A to point B but if a sandy chip is at 5.0 it will make up what it might be lacking in different areas with pure speed and achieve the same goal ( aka, same benchmark score)
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post #103 of 115
Quote:
Originally Posted by whipple16 View Post

its like saying 1 gpu with clocks of 850 core will get the same score in heaven as a different gpu with a 950 core on the same machine. the chips have different architecture and are made in different ways to make one perform better
ivy at 4.5 might just me more efficient and have quicker ways of getting from point A to point B but if a sandy chip is at 5.0 it will make up what it might be lacking in different areas with pure speed and achieve the same goal ( aka, same benchmark score)

 

I get it.

It's like a pair of dragsters.

One may hit a higher speed for a split-second, and lose, because it couldn't cross the finish line first.

So you're saying Ivy Bridge is a loser, because it can never beat a Sandy Bridge cpu in the real world?

post #104 of 115
No I think what he meant was Ivy only needs to be at 4.5ghz to perform the same as sandy does at 5ghz.

Although I had a friend go from a 2500k to a 3570k and he did some comparison benches between them. I think the margin was even closer than that.
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post #105 of 115
nice article man , i got my card , ran a base run in 3dmark , then cranked the power to max and oced to what might be a rediculous first attempt. completed 3dmark , 300 marks below base smile.gif . I eventually figured it out tho .+100/+500 no power boost . on a gigabyte oc 670 thats 1302 boost clock wink.gif
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post #106 of 115
Thank you very much for this excellent post.

+1 REP
post #107 of 115
This is my first time overclocking. And my 680 SC wont go pass 60+ gpu core clock. Anything above and it will either artifact and sometimes complete or just fail after a couple of minutes. I'm using evgas stock cooler, which isnt too well to overclock with.

I'm currently using 132% power target (max), +60 gpu clock offset, +178 mem clock off set. When im running heaven, its stable @ 1249mhz, doesnt drop at all, power @ 97-100, and temp doesnt go above 70c. I believe thats stable. Would a better cooler, say a mod bracket with a h100 / kuhler 920 make be able to push the card further, or do i have a not so good oc card?
post #108 of 115
Quote:
Originally Posted by Dutambalu View Post

This is my first time overclocking. And my 680 SC wont go pass 60+ gpu core clock. Anything above and it will either artifact and sometimes complete or just fail after a couple of minutes. I'm using evgas stock cooler, which isnt too well to overclock with.
I'm currently using 132% power target (max), +60 gpu clock offset, +178 mem clock off set. When im running heaven, its stable @ 1249mhz, doesnt drop at all, power @ 97-100, and temp doesnt go above 70c. I believe thats stable. Would a better cooler, say a mod bracket with a h100 / kuhler 920 make be able to push the card further, or do i have a not so good oc card?

Have you tried dropping memory offset to 0 and just upping the core clock offset to get the max before messing with memory? If not, give it a shot. I found that mine doesn't like memory offset too much.
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post #109 of 115
Reading through this whole post to try and get an idea of what people are doing. Thanks for this!
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post #110 of 115
Quote:
Originally Posted by Dutambalu View Post

This is my first time overclocking. And my 680 SC wont go pass 60+ gpu core clock. Anything above and it will either artifact and sometimes complete or just fail after a couple of minutes. I'm using evgas stock cooler, which isnt too well to overclock with.
I'm currently using 132% power target (max), +60 gpu clock offset, +178 mem clock off set. When im running heaven, its stable @ 1249mhz, doesnt drop at all, power @ 97-100, and temp doesnt go above 70c. I believe thats stable. Would a better cooler, say a mod bracket with a h100 / kuhler 920 make be able to push the card further, or do i have a not so good oc card?

Hey I've also been attempting to OC mine as well, as another user said you can just try altering the core clock, I've found that when I tried increasing memory clocks along with a high core clock offset (eg. +100 / +35) I crash 99% of the time in heaven. I'm also using the multi-monitor benchm as well cause I have a surround setup & need to be stable using 5760x1080 res.

Using 'the mod' did help me a little cause I did manage a +100 / 0 offset, 100% power target in heaven w/o any crashes, using my stock cooler bf this was not possible (couldve only managed small OC like + 50/ +25, 100% power target). I mainly did mine for a quieter PC & lower temps which is the most significant of benefits (idle temps w/ mod 32-34°, load 52-53°) & most importantly it all depends if ur GPU chip is a good overclocker.
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