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~~The GTX 670 Overclocking Master-Guide~~ - Page 183

post #1821 of 3357
Quote:
Originally Posted by Forceman View Post

I mean the low FPS you get when you run the benchmark. So instead of a min FPS of 22 FPS, you'd get a min of 26 FPS (for example). Here's what I'm talking about. Same settings, but one run was just load it and press F9, the other was load it, cycle through with enter, then hit F9. I just got tired of running them, and sometimes for no reason you'd get a min FPS that was like 7.5 or something. Doing the Enter thing seems to prevent that.




Oh ok. Got it, thanks.
post #1822 of 3357
The Kepler Boost is a static number per card right? Because last night I was ending up with a Kepler Boost of 130 (+170 for 1150 boost pegged off at 1280, unstable) and 117 (+165 for 1145 boost, pegged off at 1262, stable). I never went above 65C so it wasn't thermal throttling. Is there something else that would cause it to throttle? I'm at max power target and voltage in Precision. Is a varying Kepler boost a sign of instability, or am I doing something wrong and my true Kepler boost really is 130?

At +170, I was trying to play around with my mem clock between +660-680 to get it stable and I was able to get through Heaven but it was crashing on other things (ended up at +170 +675). So I dropped the core to +165 and seem to be stable with +673 mem clock. My Kepler boost is 117 like this.
Edited by omega2551 - 3/1/13 at 11:33am
post #1823 of 3357
Quote:
Originally Posted by Forceman View Post

It'll have higher temps when the clocks are higher, so that's normal. Have you tried dropping the memory overclock a little and retrying Heaven? If you put the memory too high you can lose performance because of the error correction, so check to see if your memory overclock is actually adding performance. It also helps to use Enter to cycle through all the Heaven zones before you start the benchmark - helps prevent the crazy low mins you sometimes get when it starts a new zone the first time, and that can help your score also.

No I mean the temps and performance changed when the settings were identical. That's why I was saying it seemed weird that I would get the higher score when my temp pegged off higher. Maybe it does have to do with the enter thing though, but my min between the 2 was exactly the same only the max changed.


post #1824 of 3357
Quote:
Originally Posted by omega2551 View Post

The Kepler Boost is a static number per card right? Because last night I was ending up with a Kepler Boost of 130 (+170 for 1150 boost pegged off at 1280, unstable) and 117 (+165 for 1145 boost, pegged off at 1262, stable). I never went above 65C so it wasn't thermal throttling. Is there something else that would cause it to throttle? I'm at max power target and voltage in Precision. Is a varying Kepler boost a sign of instability, or am I doing something wrong and my true Kepler boost really is 130?

At +170, I was trying to play around with my mem clock between +660-680 to get it stable and I was able to get through Heaven but it was crashing on other things (ended up at +170 +675). So I dropped the core to +165 and seem to be stable with +673 mem clock. My Kepler boost is 117 like this.

There's no need to worry about what the Kepler boost is on your card, just worry about the final load clock speed. The clock speeds work on 13MHz levels, so if you had 1280 with +170, then even going to +169 might drop the clock speed all the way to 1267 if it puts it at the next level down. That sounds like what is happening to you, since you had +170/1280 and +165/1262 (which is 5+13 below 1280).
post #1825 of 3357
Hi, First time OCing so i have a few questions, managed to +135MHz on core clock and +435 on memory clock and found them to be my stable amounts however when attempting the furmark benchmark i had driver crashes, is heaven not a reliable benchmark tool any more? also after restarting my computer i realised that precision x's settings were default again do i need to put in the clock speeds,power target and voltage in the nvidia drivers themselves?
Edited by anon123 - 3/1/13 at 2:16pm
post #1826 of 3357
Quote:
Originally Posted by anon123 View Post

Hi, First time OCing so i have a few questions, managed to +135MHz on core clock and +435 on memory clock and found them to be my stable amounts however when attempting the furmark benchmark i had driver crashes, is heaven not a reliable benchmark tool any more? also after restarting my computer i realised that precision x's settings were default again do i need to put in the clock speeds,power target and voltage in the nvidia drivers themselves?

Post your actual clockspeed instead of the offsets, since every card boost differently the offset alone doesn't tell much. Are you talking abotu Furmark or Heaven, because your sentence mentions both. I owuldn't use Furmark, but Heaven is still a pretty decent initial test for stability. If it is crashing in Heaven it will probably also crash in games, so you probably need to turn down the offset a little. Make sure you check the apply on startup box in Precision, it should keep the settings over a restart.
post #1827 of 3357
Quote:
Originally Posted by Forceman View Post

Post your actual clockspeed instead of the offsets, since every card boost differently the offset alone doesn't tell much. Are you talking abotu Furmark or Heaven, because your sentence mentions both. I owuldn't use Furmark, but Heaven is still a pretty decent initial test for stability. If it is crashing in Heaven it will probably also crash in games, so you probably need to turn down the offset a little. Make sure you check the apply on startup box in Precision, it should keep the settings over a restart.

Ah, sorry. My core clock is stable at 1220 MHz and my memory is at 1765, I mentioned both furmark and heaven because as said in the guide i ran heaven to find my ideal clockspeeds then went to furmark to find ideal fanspeeds. It ran heaven fine at these settings but it crashed on furmark, covering my screen with artefacts then the drivers would crash and restore.

Another noob question is do i keep my power target and voltage maxed out constantly or should I revert them?
post #1828 of 3357
1220 is a pretty good overclock. I would leave the power limit maxed, but, unless you have one of a few cards, increasing the voltage doesn't really do anything so I would just set that back to default.
post #1829 of 3357
Setting the voltage at max does do something. It keeps the voltage at 1.175v during 3d clocks so you dont get crashes because the chip wants more voltage quick fast and in a hurry. If it cant respond fast enough it will crash. Keeping them maxed helps prevent this. I know for a fact i crash at max overclocks without the voltage slider maxed.
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post #1830 of 3357
Quote:
Originally Posted by pc-illiterate View Post

Setting the voltage at max does do something. It keeps the voltage at 1.175v during 3d clocks so you dont get crashes because the chip wants more voltage quick fast and in a hurry. If it cant respond fast enough it will crash. Keeping them maxed helps prevent this. I know for a fact i crash at max overclocks without the voltage slider maxed.

Agreed with this.
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