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~~The GTX 670 Overclocking Master-Guide~~ - Page 255

post #2541 of 3357
Quote:
Originally Posted by Forceman View Post

No. Each card boosts to a different speed, that's just the nature of the Kepler boost technology. So you have the base boost clock (which is what is on the box, so 1006 for GTX 680s, for example), then you have your card's actual boost clock speed (the difference from the base boost clock to your boost clock is called the Kepler boost by some), and then you have the overclocked speed, which is your card's boost clock plus the offset you specify in Afterburner/Precision.

In your case it looks like your base boost clock is 980, your card's actual boost clock is 1105, and your overclocked speed is 1175. The 1050 in the screenshot is just the base clock plus the offset, which is what non-aware software reports (it uses the base boost clock instead of your card's actual boost clock - so 980+70=1050).
Ahh that makes sense so my stock boost is +125. and a +70 overclock.
So when considering the maximum safe overclock is the 1105 number more important or the 1175 number? I'm not sure how far to take this thing, but it seems to be plenty reliable right now. I haven't touched the memory. What is generally considered safe to overclock to on these 670s and what starts to become risky?
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post #2542 of 3357
Quote:
Originally Posted by michael-ocn View Post

one way is to keep the temps under 70c with a good cooling solution smile.gif

I know there is a way to do it by modding the bios.
post #2543 of 3357
Quote:
Originally Posted by ZeVo View Post

Hey guys. I got a question about two unusual things I got with my card.

1) My 670, for whatever reason, only reaches a max of 70% power usage. I have done tests in BF3 with 64 players, did about 20 Valley/Heaven benchmarks, and it still only reaches 70%. Thing is, if I use any other driver besides 320.18, the power % goes down to 30%. I messaged ASUS and they said it shouldn't have any affect on performance, but how would I know if I was hitting the TDP limit if it shows an incorrect reading?

2) This question I believe has something to do with my first one. So far, I can only get +65 on my core offset without it showing me a ridiculous clock speed in games. So my card boosts up to 1032MHz if temps stay under 58C and boosts up another 13MHz when it goes over, so +65 makes my card go up to 1097MHz with temps below 58C, and once again boosts up 13MHz with temps over 58C to 1100MHz. I overclock by +13MHz each time, but if I go, for example +77 or +90 and continue with +13, my card goes up to 1150MHz. Isn't that odd? If I put +77 shouldn't it be at 1100MHz and then 1113MHz if my temps go past 58C?

I don't fully understand how to overclock Kepler 100% but I don't think that is normal behavior.

Any help?
Anyone?

frown.gif
post #2544 of 3357
Quote:
Originally Posted by ZeVo View Post

Hey guys. I got a question about two unusual things I got with my card.

1) My 670, for whatever reason, only reaches a max of 70% power usage. I have done tests in BF3 with 64 players, did about 20 Valley/Heaven benchmarks, and it still only reaches 70%. Thing is, if I use any other driver besides 320.18, the power % goes down to 30%. I messaged ASUS and they said it shouldn't have any affect on performance, but how would I know if I was hitting the TDP limit if it shows an incorrect reading?

2) This question I believe has something to do with my first one. So far, I can only get +65 on my core offset without it showing me a ridiculous clock speed in games. So my card boosts up to 1032MHz if temps stay under 58C and boosts up another 13MHz when it goes over, so +65 makes my card go up to 1097MHz with temps below 58C, and once again boosts up 13MHz with temps over 58C to 1100MHz. I overclock by +13MHz each time, but if I go, for example +77 or +90 and continue with +13, my card goes up to 1150MHz. Isn't that odd? If I put +77 shouldn't it be at 1100MHz and then 1113MHz if my temps go past 58C?

I don't fully understand how to overclock Kepler 100% but I don't think that is normal behavior.

Any help?

I have a hard time understanding what you're saying, maybe nobody has replied because they don't get what you're saying either.

1) What are you gpu usage and clocks when power usage is low on a valley run? Pics of the precx performance log might help explain what's going on. What kind of score and framerate do you get on valley on the extremehd setting? Is it grossly underperforming?

2) 58c is not a thermal throttling point, above and below 58c mox nix... did you mean 70c? All that matters is max boost clock and that you run at that max boost by virtue of not exceeding temp or power limits. Sounds like you are no where near you power limit and you say your card clocks to 1150MHz... what's the problem with that?

> So far, I can only get +65 on my core offset without it showing me a ridiculous clock speed in games

What does "showing ridiculous clock speed in games" mean?
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post #2545 of 3357
Quote:
Originally Posted by michael-ocn View Post

I have a hard time understanding what you're saying, maybe nobody has replied because they don't get what you're saying either.

1) What are you gpu usage and clocks when power usage is low on a valley run? Pics of the precx performance log might help explain what's going on. What kind of score and framerate do you get on valley on the extremehd setting? Is it grossly underperforming?

2) 58c is not a thermal throttling point, above and below 58c mox nix... did you mean 70c? All that matters is max boost clock and that you run at that max boost by virtue of not exceeding temp or power limits. Sounds like you are no where near you power limit and you say your card clocks to 1150MHz... what's the problem with that?

> So far, I can only get +65 on my core offset without it showing me a ridiculous clock speed in games

What does "showing ridiculous clock speed in games" mean?
Alright, sorry if I didn't include any pictures. Maybe I'll make more sense this time.

So I overclock by increments of +13 on the core clock. My boost clock is 980MHz while my max boost is 1032MHz with it going up to 1045MHz when temps reach 58C or higher. I don't know if this was mentioned in the guide, but it's not that I'm oscillating or downclocking. If my temps are under 58C on stock while not being OCed, my max core clock will be 1032MHz. If it goes over 58C, it boosts itself up 13MHz to 1045.

Now my issue with overclocking:



This imagine here looks perfectly fine to me. If my max boost is 1032, then adding +78 to the core gives me 1110MHz as it shows in Precision. No problems here.



This is where I get confused at. Like I said I overclock by +13, so I put +91 for my core now. Precision is still reporting 1110MHz.. if I added it by +13 shouldn't it be showing 1123MHz?



And finally this is where I stopped and asked myself what is going on. Adding +120 core now gives me a core clock of 1150MHz. In fact, adding anything over +120 still reports me at 1150MHz. If I am at +120, shouldn't my core clock be at 1152? I don't know if that 2MHz matters, but I'm confused as to why it still reports 1150MHz even if I put my OC at +140, for example.

I tried to keep it as short as I could but I am honestly lost as to why this is happening. It is probably nothing but I am not familiar with Kepler at all so hopefully you can help me out.
post #2546 of 3357
Your focused on how kepler boost figures out where to boost to. I don't really care about that myself and haven't bothered understand how it gets to its max boost clock. It's all gonna change with boost 2.0 anyway. I just focus on making the max boost achieved under full load as high as possible and stable.
Quote:
Originally Posted by ZeVo View Post

.... My boost clock is 980MHz while my max boost is 1032MHz with it going up to 1045MHz when temps reach 58C or higher...

The important number is 1045 (at least to me). The others, meh. I think you've got causality reversed regarding temps and clocks. The higher temp does not cause the higher clock. When the GPU boost up to the higher speed due to demand... it gets hotter.

The really odd thing about your charts is how low the power usage is? What scores do you get on the valley bench mark if you run the full benchmark loop? Are they in the ballpark or completely off?
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post #2547 of 3357
The low power usage doesn't make sense. I think its worth understand that before delving into what overclocking offsets to dial in.

I don't know if this helps, but here's what i got for gpuz and precx. Results in a max boost of 1267.

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post #2548 of 3357
I can compare numbers if you want to see my 670 4gb just post what you want screens of.
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post #2549 of 3357
Ok, +78 on the GPU clock and +200 on the memory clock got me this:



Here is my GPU-Z:



And here is what Precision shows me after a run of Valley. No downlocking or anything odd:



As for the messed up power percent. I know that. I already talked with ASUS a while ago and they said if it has no affect on performance that I shouldn't worry.
post #2550 of 3357
I think you are fine. I will have to improve my scores now.

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