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Coolbits 'Optimum' - Page 2

post #11 of 25
yeah, I pushed mine pretty far, but I've found that I'll get 1 more FPS when i puch it up 10MHz, and the noise just doesn't make it worth it. It's at stock now.(Ha, 490/1300 is a pretty damn good stock speed )
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post #12 of 25
That optimum feature never worked for me. It freezes my PC and eventually reboots by itself...
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post #13 of 25
Set it high as you can...run the test...benchmark....
if it freezes...lower 5mhz....test...benchmark...until you see no artifacts and your scores start to level out....
I know with my 5700...if I clock it too high I get lower scores...
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post #14 of 25
Quote:
Originally Posted by Kahuna513
The magic button in Coolbits: "Detect Optimal Frequencies"... What exactly does it do? I know it finds a balance between Core speed and Memory speed, but I know that I can increase both slightly more then 'Optimum'. Is it like... on a car, a power graph has a peak,so the maximum power isn't at the highest RPM, it's at a certain RPM? Does OC'ing have a peak performance..?
OK, It's not very clear, but I'm trying here.
Lets say an increase of 50MHz on clock speed has a 25% Increase on Performance (rough figures here guys lol). That's 25% for 50MHz. Say if you pushed it a bit more, to say 60 Mhz, would there be less performance gain? (I mean, more performance, but less bang for buck)
Thanks guys, I've just been wondering.
no overclocking is very much linear, if you get a 10% gain on 50mhz over you'll get a 20% gain on 100mhz over (unless you start screwing with timings etc, but assuming everything stays the same (all external variables, including heat) except the frequency of the gpu/ram)
post #15 of 25
Well, I recently learned this when I couldn't overclock my memory more than 5MHz over than what I got in Detect Optimal frequencies. The core clock is dependant on memory clock; "How do you know this?" you say, well it overclocked my memory to 534 and my core clock was 341, I was using ATi Tool and I overclocked my core all the way to 415 (max allowed for the card) and didn't get any artifacts and still don't but if I go to 540MHz I can't even get no artifacts for less than 10 seconds.
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post #16 of 25
Thread Starter 
Thanks a lot guys, didn't expect that much of a response lol.
Thanks again, it's all a lot clearer now, before OC'ing was a 'Mysterious Art' known only by you guys and possibly Ninjas... Heat is a problem, especially with stock cooling. I've got the air flow sorted, but really need to look in to a new HSF. Would that 'unlock' higher clockspeeds? Or just make performance better at current clock speeds? I understand the whole Temperature affecting Resistance thing perfectly, but would higher clock speeds be attainable?
I know that Japanese guys and Toms have got a P4 up to 5Ghz with extreme cooling, but I can't see how the cooling would make the 'Test' feature work better.
Basically, does the temperature affect the 'Test' feature on Coolbits?
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post #17 of 25
Quote:
Originally Posted by lightsource
Well, I recently learned this when I couldn't overclock my memory more than 5MHz over than what I got in Detect Optimal frequencies. The core clock is dependant on memory clock; "How do you know this?" you say, well it overclocked my memory to 534 and my core clock was 341, I was using ATi Tool and I overclocked my core all the way to 415 (max allowed for the card) and didn't get any artifacts and still don't but if I go to 540MHz I can't even get no artifacts for less than 10 seconds.
just because you're memory was the bottlneck, also on some ati card's the atitool artifact scanner doesn't work properly but if you run a game you'll definately notice it.
post #18 of 25
Quote:
Originally Posted by Kahuna513
Thanks a lot guys, didn't expect that much of a response lol.
Thanks again, it's all a lot clearer now, before OC'ing was a 'Mysterious Art' known only by you guys and possibly Ninjas... Heat is a problem, especially with stock cooling. I've got the air flow sorted, but really need to look in to a new HSF. Would that 'unlock' higher clockspeeds? Or just make performance better at current clock speeds? I understand the whole Temperature affecting Resistance thing perfectly, but would higher clock speeds be attainable?
I know that Japanese guys and Toms have got a P4 up to 5Ghz with extreme cooling, but I can't see how the cooling would make the 'Test' feature work better.
Basically, does the temperature affect the 'Test' feature on Coolbits?
If you care to know, the nvidia coolbits "detect optimal frequencies" runs on an algorithm dependant on heat and rendering accuracy, when it detects either too much heat being produced, or a loss in rendering accuracy (artifacts or otherwise) then it'll back down 5mhz and stay there. If your card is cooler, there is less resistance, better conductivity, and therefore you can almost always attain a higher clockspeed than without.

btw the 5ghz was nothing compared to some 8ghz overclocks they have running without having to fill up a tube with liquid nitrogen (using phase-shift cooling instead).
post #19 of 25
It's really just a safety feature to prolong the life of the product...
Here the product is nothing if it can't be almost burnt...and still work!
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post #20 of 25
Quote:
Originally Posted by Kahuna513
Thanks a lot guys, didn't expect that much of a response lol.
Thanks again, it's all a lot clearer now, before OC'ing was a 'Mysterious Art' known only by you guys and possibly Ninjas... Heat is a problem, especially with stock cooling. I've got the air flow sorted, but really need to look in to a new HSF. Would that 'unlock' higher clockspeeds? Or just make performance better at current clock speeds? I understand the whole Temperature affecting Resistance thing perfectly, but would higher clock speeds be attainable?
I know that Japanese guys and Toms have got a P4 up to 5Ghz with extreme cooling, but I can't see how the cooling would make the 'Test' feature work better.
Basically, does the temperature affect the 'Test' feature on Coolbits?

Heat is major factor on any kind of overclock, but also beware that all cards will overclock differantly, better cooling, ram sinks for the memory, and good air flow in the case.
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