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~~The GTX 670 Overclocking Master-Guide~~ - Page 146

post #1451 of 3357
i have a evga gtx 670 sc 4gb
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post #1452 of 3357
Quote:
Originally Posted by Mr Mari0o View Post

is it possible to have a K boost of 1? if not i'm doing something way wrong lol. im taking my boost clock which is 1046 and subtracting my max boost which gpu-z is telling me is 1045 thinking.gif

I don't think so because 13MHz should be the interval between these two values. And if you did it right, you actually have a K boost of -1, lol. In most cases, the max boost clock should be higher than the boost clock displayed in GPU-Z.
post #1453 of 3357
Quote:
Originally Posted by beekermartin View Post

Well guess what? Crysis crashed again. This time I noticed the max clock had jumped to 1202 mhz when it crashed.

So something in Crysis is causing my card to run faster randomly for a split second and causing crashes. I assume this is driver related but I find that odd for such an old game.

You're not listing temps but I've seen this across 3 cards now (out of 4) so it's not uncommon. My first card appear to run 1097Mhz for it to then suddenly jump to 1110Mhz when the temps hit ~62 degrees. Of course once I put it under water, I never saw that temperature and I never saw that 1110Mhz again (this is with no OC obviously).

Since then I've RMAed both my cards and now both exhibit this same behaviour but thankfully already at around ~38 degrees which even under water they reach.

I've seen others mention this too but all that said - this weird jump didn't cause a BSOD or game falling over (for me) and wasn't specific to a game.
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post #1454 of 3357
Quote:
Originally Posted by kevindd992002 View Post

I don't think so because 13MHz should be the interval between these two values. And if you did it right, you actually have a K boost of -1, lol. In most cases, the max boost clock should be higher than the boost clock displayed in GPU-Z.

well i just ran the test 3 times and i keep getting 1045.2 as my max boost and my boost is 1046 questionmark.gif
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post #1455 of 3357
This guide looks very good but why does the OP tell you to MAX your Vcore/Power target? I have read most of the guide but I still don't fully understand. Wouldn't the card burn up instantly if I were to set the Vcore to max? rolleyes.gif
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post #1456 of 3357
Quote:
Originally Posted by Uzanar View Post

This guide looks very good but why does the OP tell you to MAX your Vcore/Power target? I have read most of the guide but I still don't fully understand. Wouldn't the card burn up instantly if I were to set the Vcore to max? rolleyes.gif

You can not overvolt these cards, without either a BIOS or Hardware mod. The voltage slider merely changes how the voltage reacts to load. Maxing out the voltage slider will make the average voltage be higher, and it will max out on a lesser load. This increases stability, but does not increase voltage.

In regards to the power target; there is no reason not to max it. You might get the same results on 105% as 110%, but setting it to 110% won't increase the power draw. Max it out, so that you do not need to worry about it at all, the card will only draw as much power as it needs, nomatter what your power limit is set to.
post #1457 of 3357
Quote:
Originally Posted by iRandomize View Post

You can not overvolt these cards, without either a BIOS or Hardware mod. The voltage slider merely changes how the voltage reacts to load. Maxing out the voltage slider will make the average voltage be higher, and it will max out on a lesser load. This increases stability, but does not increase voltage.

In regards to the power target; there is no reason not to max it. You might get the same results on 105% as 110%, but setting it to 110% won't increase the power draw. Max it out, so that you do not need to worry about it at all, the card will only draw as much power as it needs, nomatter what your power limit is set to.

Not saying you're wrong or anything but you have any proof to this claim? I've been stuck at 1163 stock max core for the longest until I started messing with the core voltage slider. With +50 I was able to reach 1267 without crashing so far. Only reason I don't leave it there is because I don't know if the actual voltage is being increased past what is monitored. I've read the pe 670 cards can't be monitored. Just wondering because I don't want to kill my card but if it doesn't really raise voltage but instead stabilizes the voltage to to 1.175 would make me not have to worry as much.
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post #1458 of 3357
just raise it. raise them both. its perfectly fine and safe. no one has killed their card running full power target nor full voltage adjustment.
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post #1459 of 3357
My advice to fellow 670 overclockers:

core offset is overrated. Memory offset can do equally much difference. So if you guys are having a hard time finding a stable core offset that isn't too low, try lowering the offset a lot, and highering the memory offset instead.

Like in my case: I thought I had a stable overclock at +65 and +565 on memory, but no. After like hours of playing AC3, the graphics drivers finally crashed And I just didn't want to go lower than +65 (I had tried only lowering the memory offset and leaving it at +65 many times, but it just didn't want to be stable at +65 no matter how much I lowered memory offset), so what I did was I lowered my gpu offset to +53, and highered my memory all the way up to +705, and that proved to be 100% stable with even better performance results than on my +65 on core.

Yeah, that's my advice of the day xD
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post #1460 of 3357
In Far cry 3 my mhz jumps all over the place but it stays fixed and stable in Heaven. Any ideas why?
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